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TITokenField.m
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//
// TITokenField.m
// TITokenField
//
// Created by Tom Irving on 16/02/2010.
// Copyright 2012 Tom Irving. All rights reserved.
//
#import "TITokenField.h"
#import <QuartzCore/QuartzCore.h>
@interface TITokenField ()
@property (nonatomic, assign) BOOL forcePickSearchResult;
@property (nonatomic, assign) BOOL alwaysShowSearchResult;
@end
//==========================================================
#pragma mark - TITokenFieldView -
//==========================================================
@interface TITokenFieldView (Private)
- (void)setup;
- (NSString *)displayStringForRepresentedObject:(id)object;
- (NSString *)searchResultStringForRepresentedObject:(id)object;
- (void)setSearchResultsVisible:(BOOL)visible;
- (void)resultsForSearchString:(NSString *)searchString;
- (void)presentpopoverAtTokenFieldCaretAnimated:(BOOL)animated;
@end
@implementation TITokenFieldView {
UIView * _contentView;
NSMutableArray * _resultsArray;
UIPopoverController * _popoverController;
}
@dynamic delegate;
@synthesize showAlreadyTokenized = _showAlreadyTokenized;
@synthesize searchSubtitles = _searchSubtitles;
@synthesize subtitleIsPhoneNumber = _subtitleIsPhoneNumber;
@synthesize forcePickSearchResult = _forcePickSearchResult;
@synthesize alwaysShowSearchResult = _alwaysShowSearchResult;
@synthesize shouldSortResults = _shouldSortResults;
@synthesize shouldSearchInBackground = _shouldSearchInBackground;
@synthesize shouldAlwaysShowSeparator = _shouldAlwaysShowSeparator;
@synthesize permittedArrowDirections = _permittedArrowDirections;
@synthesize tokenField = _tokenField;
@synthesize resultsTable = _resultsTable;
@synthesize contentView = _contentView;
@synthesize separator = _separator;
@synthesize tableHeader = _tableHeader;
@synthesize sourceArray = _sourceArray;
#pragma mark Init
- (instancetype)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])){
[self setup];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])){
[self setup];
}
return self;
}
- (void)setup {
[self setBackgroundColor:[UIColor clearColor]];
[self setDelaysContentTouches:NO];
[self setMultipleTouchEnabled:NO];
_showAlreadyTokenized = NO;
_searchSubtitles = YES;
_subtitleIsPhoneNumber = NO;
_forcePickSearchResult = NO;
_alwaysShowSearchResult = NO;
_shouldSortResults = YES;
_shouldSearchInBackground = NO;
_shouldAlwaysShowSeparator = YES;
_permittedArrowDirections = UIPopoverArrowDirectionUp;
_resultsArray = [NSMutableArray array];
_tokenField = [[TITokenField alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 42)];
[_tokenField addTarget:self action:@selector(tokenFieldDidBeginEditing:) forControlEvents:UIControlEventEditingDidBegin];
[_tokenField addTarget:self action:@selector(tokenFieldDidEndEditing:) forControlEvents:UIControlEventEditingDidEnd];
[_tokenField addTarget:self action:@selector(tokenFieldTextDidChange:) forControlEvents:UIControlEventEditingChanged];
[_tokenField addTarget:self action:@selector(tokenFieldFrameWillChange:) forControlEvents:(UIControlEvents)TITokenFieldControlEventFrameWillChange];
[_tokenField addTarget:self action:@selector(tokenFieldFrameDidChange:) forControlEvents:(UIControlEvents)TITokenFieldControlEventFrameDidChange];
[_tokenField setDelegate:self];
[self addSubview:_tokenField];
CGFloat tokenFieldBottom = CGRectGetMaxY(_tokenField.frame);
_separator = [[UIView alloc] initWithFrame:CGRectMake(0, tokenFieldBottom, self.bounds.size.width, 1)];
[_separator setBackgroundColor:[UIColor colorWithWhite:0.7 alpha:1]];
_tableHeader = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 1)];
[_tableHeader setBackgroundColor:[UIColor colorWithWhite:0.7 alpha:1]];
[self addSubview:_separator];
// This view is created for convenience, because it resizes and moves with the rest of the subviews.
_contentView = [[UIView alloc] initWithFrame:CGRectMake(0, tokenFieldBottom + 1, self.bounds.size.width,
self.bounds.size.height - tokenFieldBottom - 1)];
[_contentView setBackgroundColor:[UIColor clearColor]];
[self addSubview:_contentView];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){
UITableViewController * tableViewController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
[tableViewController.tableView setDelegate:self];
[tableViewController.tableView setDataSource:self];
[tableViewController setContentSizeForViewInPopover:CGSizeMake(400, 400)];
_resultsTable = tableViewController.tableView;
_popoverController = [[UIPopoverController alloc] initWithContentViewController:tableViewController];
}
else
{
_resultsTable = [[UITableView alloc] initWithFrame:CGRectMake(0, tokenFieldBottom + 1, self.bounds.size.width, 10)];
[_resultsTable setSeparatorColor:[UIColor colorWithWhite:0.85 alpha:1]];
[_resultsTable setBackgroundColor:[UIColor colorWithRed:0.92 green:0.92 blue:0.92 alpha:1]];
[_resultsTable setDelegate:self];
[_resultsTable setDataSource:self];
[_resultsTable setHidden:YES];
[self addSubview:_resultsTable];
_popoverController = nil;
}
if (_shouldAlwaysShowSeparator) {
[self bringSubviewToFront:_separator];
} else {
_separator.hidden = YES;
_resultsTable.tableHeaderView = _tableHeader;
}
[self bringSubviewToFront:_tokenField];
[self updateContentSize];
}
#pragma mark Property Overrides
- (void) setChildFrames:(CGRect)frame {
CGFloat width = frame.size.width;
[_separator setFrame:((CGRect){_separator.frame.origin, {width, _separator.bounds.size.height}})];
[_resultsTable setFrame:((CGRect){_resultsTable.frame.origin, {width, _resultsTable.bounds.size.height}})];
[_contentView setFrame:((CGRect){_contentView.frame.origin, {width, (frame.size.height - CGRectGetMaxY(_tokenField.frame))}})];
[_tokenField setFrame:((CGRect){_tokenField.frame.origin, {width, _tokenField.bounds.size.height}})];
}
- (void)setFrame:(CGRect)frame {
[super setFrame:frame];
[self setChildFrames:frame];
if (_popoverController.popoverVisible){
[_popoverController dismissPopoverAnimated:NO];
[self presentpopoverAtTokenFieldCaretAnimated:NO];
}
[self updateContentSize];
[self setNeedsLayout];
}
- (void)setContentOffset:(CGPoint)offset {
[super setContentOffset:offset];
[self setNeedsLayout];
}
- (NSArray *)tokenTitles {
return _tokenField.tokenTitles;
}
- (void)setForcePickSearchResult:(BOOL)forcePickSearchResult
{
_tokenField.forcePickSearchResult = forcePickSearchResult;
_forcePickSearchResult = forcePickSearchResult;
}
- (void)setAlwaysShowSearchResult:(BOOL)alwaysShowSearchResult
{
_tokenField.alwaysShowSearchResult = alwaysShowSearchResult;
_alwaysShowSearchResult = alwaysShowSearchResult;
if (_alwaysShowSearchResult) [self resultsForSearchString:_tokenField.text];
}
- (void) setShouldAlwaysShowSeparator:(BOOL)shouldAlwaysShowSeparator
{
_shouldAlwaysShowSeparator = shouldAlwaysShowSeparator;
if (_shouldAlwaysShowSeparator) {
_resultsTable.tableHeaderView = nil;
_separator.hidden = NO;
[self bringSubviewToFront:_separator];
} else {
_separator.hidden = YES;
_resultsTable.tableHeaderView = _tableHeader;
}
}
#pragma mark Event Handling
- (void)layoutSubviews {
[super layoutSubviews];
[self setChildFrames:self.frame];
CGFloat relativeFieldHeight = CGRectGetMaxY(_tokenField.frame) - self.contentOffset.y;
CGFloat newHeight = self.bounds.size.height - relativeFieldHeight;
if (newHeight > -1) [_resultsTable setFrame:((CGRect){_resultsTable.frame.origin, {_resultsTable.bounds.size.width, newHeight}})];
}
- (void)updateContentSize {
[self setContentSize:CGSizeMake(self.bounds.size.width, CGRectGetMaxY(_contentView.frame) + 1)];
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (BOOL)becomeFirstResponder {
return [_tokenField becomeFirstResponder];
}
- (BOOL)resignFirstResponder {
return [_tokenField resignFirstResponder];
}
#pragma mark TableView Methods
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:resultsTableView:heightForRowAtIndexPath:)]){
return [_tokenField.delegate tokenField:_tokenField resultsTableView:tableView heightForRowAtIndexPath:indexPath];
}
return 44;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:didFinishSearch:)]){
[_tokenField.delegate tokenField:_tokenField didFinishSearch:_resultsArray];
}
return _resultsArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
id representedObject = [_resultsArray objectAtIndex:indexPath.row];
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:resultsTableView:cellForRepresentedObject:)]){
return [_tokenField.delegate tokenField:_tokenField resultsTableView:tableView cellForRepresentedObject:representedObject];
}
static NSString * CellIdentifier = @"ResultsCell";
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
NSString * subtitle = [self searchResultSubtitleForRepresentedObject:representedObject];
if (!cell) cell = [[UITableViewCell alloc] initWithStyle:(subtitle ? UITableViewCellStyleSubtitle : UITableViewCellStyleDefault) reuseIdentifier:CellIdentifier];
[cell.imageView setImage:[self searchResultImageForRepresentedObject:representedObject]];
[cell.textLabel setText:[self searchResultStringForRepresentedObject:representedObject]];
[cell.detailTextLabel setText:subtitle];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
id representedObject = [_resultsArray objectAtIndex:indexPath.row];
TIToken * token = [[TIToken alloc] initWithTitle:[self displayStringForRepresentedObject:representedObject] representedObject:representedObject];
[_tokenField addToken:token];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if (!_alwaysShowSearchResult) [self setSearchResultsVisible:NO];
}
#pragma mark TextField Methods
- (void)tokenFieldDidBeginEditing:(TITokenField *)field {
if (!_alwaysShowSearchResult) [_resultsArray removeAllObjects];
[_resultsTable reloadData];
}
- (void)tokenFieldDidEndEditing:(TITokenField *)field {
[self tokenFieldDidBeginEditing:field];
}
- (void)tokenFieldTextDidChange:(TITokenField *)field {
[self resultsForSearchString:_tokenField.text];
if (_forcePickSearchResult || _alwaysShowSearchResult) [self setSearchResultsVisible:YES];
else [self setSearchResultsVisible:(_resultsArray.count > 0)];
}
- (void)tokenFieldFrameWillChange:(TITokenField *)field {
CGFloat tokenFieldBottom = CGRectGetMaxY(_tokenField.frame);
[_separator setFrame:((CGRect){{_separator.frame.origin.x, tokenFieldBottom}, _separator.bounds.size})];
[_resultsTable setFrame:((CGRect){{_resultsTable.frame.origin.x, (tokenFieldBottom + 1)}, _resultsTable.bounds.size})];
[_contentView setFrame:((CGRect){{_contentView.frame.origin.x, (tokenFieldBottom + 1)}, _contentView.bounds.size})];
}
- (void)tokenFieldFrameDidChange:(TITokenField *)field {
[self updateContentSize];
}
#pragma mark Results Methods
- (NSString *)displayStringForRepresentedObject:(id)object {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:displayStringForRepresentedObject:)]){
return [_tokenField.delegate tokenField:_tokenField displayStringForRepresentedObject:object];
}
if ([object isKindOfClass:[NSString class]]){
return (NSString *)object;
}
return [NSString stringWithFormat:@"%@", object];
}
- (NSString *)searchResultStringForRepresentedObject:(id)object {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:searchResultStringForRepresentedObject:)]){
return [_tokenField.delegate tokenField:_tokenField searchResultStringForRepresentedObject:object];
}
return [self displayStringForRepresentedObject:object];
}
- (NSString *)searchResultSubtitleForRepresentedObject:(id)object {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:searchResultSubtitleForRepresentedObject:)]){
return [_tokenField.delegate tokenField:_tokenField searchResultSubtitleForRepresentedObject:object];
}
return nil;
}
- (UIImage *)searchResultImageForRepresentedObject:(id)object {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:searchResultImageForRepresentedObject:)]) {
return [_tokenField.delegate tokenField:_tokenField searchResultImageForRepresentedObject:object];
}
return nil;
}
- (void)setSearchResultsVisible:(BOOL)visible {
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){
if (visible) [self presentpopoverAtTokenFieldCaretAnimated:YES];
else [_popoverController dismissPopoverAnimated:YES];
}
else
{
[_resultsTable setHidden:!visible];
[_tokenField setResultsModeEnabled:visible];
}
}
- (void)resultsForSearchString:(NSString *)searchString {
// The brute force searching method.
// Takes the input string and compares it against everything in the source array.
// If the source is massive, this could take some time.
// You could always subclass and override this if needed or do it on a background thread.
// GCD would be great for that.
[_resultsArray removeAllObjects];
[_resultsTable reloadData];
searchString = [searchString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if (searchString.length || _forcePickSearchResult || _alwaysShowSearchResult){
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:shouldUseCustomSearchForSearchString:)] && [_tokenField.delegate tokenField:_tokenField shouldUseCustomSearchForSearchString:searchString]) {
if ([_tokenField.delegate respondsToSelector:@selector(tokenField:performCustomSearchForSearchString:withCompletionHandler:)]) {
[_tokenField.delegate tokenField:_tokenField performCustomSearchForSearchString:searchString withCompletionHandler:^(NSArray *results) {
[self searchDidFinish:results];
}];
}
} else {
if (_shouldSearchInBackground) {
[self performSelectorInBackground:@selector(performSearch:) withObject:searchString];
} else {
[self performSearch:searchString];
}
}
}
}
- (void) performSearch:(NSString *)searchString {
NSMutableArray * resultsToAdd = [[NSMutableArray alloc] init];
[_sourceArray enumerateObjectsUsingBlock:^(id sourceObject, NSUInteger idx, BOOL *stop){
NSString * query = [self searchResultStringForRepresentedObject:sourceObject];
NSString * querySubtitle = [self searchResultSubtitleForRepresentedObject:sourceObject];
if (!querySubtitle || !_searchSubtitles) {
querySubtitle = @"";
} else if (_subtitleIsPhoneNumber) {
querySubtitle = [querySubtitle stringByReplacingOccurrencesOfString:@" " withString:@""];
}
if ([query rangeOfString:searchString options:NSCaseInsensitiveSearch].location != NSNotFound ||
[querySubtitle rangeOfString:searchString options:NSCaseInsensitiveSearch].location != NSNotFound ||
(_forcePickSearchResult && searchString.length == 0) ||
(_alwaysShowSearchResult && searchString.length == 0)){
__block BOOL shouldAdd = ![resultsToAdd containsObject:sourceObject];
if (shouldAdd && !_showAlreadyTokenized){
[_tokenField.tokens enumerateObjectsUsingBlock:^(TIToken * token, NSUInteger idx, BOOL *secondStop){
if ([token.representedObject isEqual:sourceObject]){
shouldAdd = NO;
*secondStop = YES;
}
}];
}
if (shouldAdd) [resultsToAdd addObject:sourceObject];
}
}];
[self searchDidFinish:resultsToAdd];
}
- (void)searchDidFinish:(NSArray *)results
{
[_resultsArray addObjectsFromArray:results];
if (_resultsArray.count > 0) {
if (_shouldSortResults) {
[_resultsArray sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {
return [[self searchResultStringForRepresentedObject:obj1] localizedCaseInsensitiveCompare:[self searchResultStringForRepresentedObject:obj2]];
}];
}
[self performSelectorOnMainThread:@selector(reloadResultsTable) withObject:nil waitUntilDone:YES];
}
}
-(void) reloadResultsTable {
[_resultsTable setHidden:NO];
[_resultsTable reloadData];
}
- (void)presentpopoverAtTokenFieldCaretAnimated:(BOOL)animated {
UITextPosition * position = [_tokenField positionFromPosition:_tokenField.beginningOfDocument offset:2];
[_popoverController presentPopoverFromRect:[_tokenField caretRectForPosition:position]
inView:_tokenField
permittedArrowDirections:[self permittedArrowDirections]
animated:animated];
}
#pragma mark Other
- (NSString *)description {
return [NSString stringWithFormat:@"<TITokenFieldView %p; Token count = %d>", self, self.tokenTitles.count];
}
- (void)dealloc {
[self setDelegate:nil];
}
@end
//==========================================================
#pragma mark - TITokenField -
//==========================================================
NSString * const kTextEmpty = @"\u200B"; // Zero-Width Space
NSString * const kTextHidden = @"\u200D"; // Zero-Width Joiner
@interface TITokenFieldInternalDelegate ()
@property (nonatomic, weak) id <UITextFieldDelegate> delegate;
@property (nonatomic, weak) TITokenField * tokenField;
@end
@interface TITokenField ()
@property (nonatomic, readonly) CGFloat leftViewWidth;
@property (nonatomic, readonly) CGFloat rightViewWidth;
@property (weak, nonatomic, readonly) UIScrollView * scrollView;
@end
@interface TITokenField (Private)
- (void)setup;
- (CGFloat)layoutTokensInternal;
@end
@implementation TITokenField {
id __weak delegate;
TITokenFieldInternalDelegate * _internalDelegate;
NSMutableArray * _tokens;
CGPoint _tokenCaret;
UILabel * _placeHolderLabel;
}
@synthesize delegate = delegate;
@synthesize editable = _editable;
@synthesize resultsModeEnabled = _resultsModeEnabled;
@synthesize removesTokensOnEndEditing = _removesTokensOnEndEditing;
@synthesize numberOfLines = _numberOfLines;
@synthesize selectedToken = _selectedToken;
@synthesize tokenizingCharacters = _tokenizingCharacters;
@synthesize forcePickSearchResult = _forcePickSearchResult;
@synthesize alwaysShowSearchResult = _alwaysShowSearchResult;
#pragma mark Init
- (instancetype)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])){
[self setup];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])){
[self setup];
}
return self;
}
- (void)setup {
[self setBorderStyle:UITextBorderStyleNone];
[self setFont:[UIFont systemFontOfSize:14]];
[self setBackgroundColor:[UIColor whiteColor]];
[self setAutocorrectionType:UITextAutocorrectionTypeNo];
[self setAutocapitalizationType:UITextAutocapitalizationTypeNone];
[self setContentVerticalAlignment:UIControlContentVerticalAlignmentTop];
[self addTarget:self action:@selector(didBeginEditing) forControlEvents:UIControlEventEditingDidBegin];
[self addTarget:self action:@selector(didEndEditing) forControlEvents:UIControlEventEditingDidEnd];
[self addTarget:self action:@selector(didChangeText) forControlEvents:UIControlEventEditingChanged];
[self.layer setShadowColor:[[UIColor blackColor] CGColor]];
[self.layer setShadowOpacity:0.6];
[self.layer setShadowRadius:12];
[self setPromptText:@"To:"];
[self setText:kTextEmpty];
self.promptColor = [UIColor colorWithWhite:0.5 alpha:1];
_internalDelegate = [[TITokenFieldInternalDelegate alloc] init];
[_internalDelegate setTokenField:self];
[super setDelegate:_internalDelegate];
_tokens = [NSMutableArray array];
_editable = YES;
_removesTokensOnEndEditing = YES;
_tokenizingCharacters = [NSCharacterSet characterSetWithCharactersInString:@","];
_tokenLimit = -1;
}
#pragma mark Property Overrides
- (void)setFrame:(CGRect)frame {
[super setFrame:frame];
[self.layer setShadowPath:[[UIBezierPath bezierPathWithRect:self.bounds] CGPath]];
[self layoutTokensAnimated:NO];
}
- (void)setText:(NSString *)text {
[super setText:(text.length == 0 ? kTextEmpty : text)];
}
- (void)setFont:(UIFont *)font {
[super setFont:font];
if ([self.leftView isKindOfClass:[UILabel class]]){
[self setPromptText:((UILabel *)self.leftView).text];
}
}
- (void)setDelegate:(id<TITokenFieldDelegate>)del {
delegate = del;
[_internalDelegate setDelegate:delegate];
}
- (NSArray *)tokens {
return [_tokens copy];
}
- (NSArray *)tokenTitles {
NSMutableArray * titles = [NSMutableArray array];
[_tokens enumerateObjectsUsingBlock:^(TIToken * token, NSUInteger idx, BOOL *stop){
if (token.title) [titles addObject:token.title];
}];
return titles;
}
- (NSArray *)tokenObjects {
NSMutableArray * objects = [NSMutableArray array];
[_tokens enumerateObjectsUsingBlock:^(TIToken * token, NSUInteger idx, BOOL *stop){
if (token.representedObject) [objects addObject:token.representedObject];
else if (token.title) [objects addObject:token.title];
}];
return objects;
}
- (UIScrollView *)scrollView {
return ([self.superview isKindOfClass:[UIScrollView class]] ? (UIScrollView *)self.superview : nil);
}
#pragma mark Event Handling
- (BOOL)becomeFirstResponder {
return (_editable ? [super becomeFirstResponder] : NO);
}
- (void)didBeginEditing {
if (_removesTokensOnEndEditing) {
[_tokens enumerateObjectsUsingBlock:^(TIToken * token, NSUInteger idx, BOOL *stop){[self addTokenToView:token];}];
}
}
- (void)didEndEditing {
[_selectedToken setSelected:NO];
_selectedToken = nil;
[self tokenizeText];
if (_removesTokensOnEndEditing){
[_tokens enumerateObjectsUsingBlock:^(TIToken * token, NSUInteger idx, BOOL *stop){[token removeFromSuperview];}];
NSString * untokenized = kTextEmpty;
if (_tokens.count){
NSArray * titles = self.tokenTitles;
untokenized = [titles componentsJoinedByString:@", "];
CGSize untokSize = [untokenized sizeWithFont:[UIFont systemFontOfSize:14]];
CGFloat availableWidth = self.bounds.size.width - self.leftView.bounds.size.width - self.rightView.bounds.size.width;
if (_tokens.count > 1 && untokSize.width > availableWidth){
untokenized = [NSString stringWithFormat:@"%d recipients", titles.count];
}
}
[self setText:untokenized];
}
[self setResultsModeEnabled:NO];
if (_tokens.count < 1 && self.forcePickSearchResult) {
[self becomeFirstResponder];
}
}
- (void)didChangeText {
if (!self.text.length)[self setText:kTextEmpty];
[self showOrHidePlaceHolderLabel];
}
- (void) showOrHidePlaceHolderLabel {
[_placeHolderLabel setHidden:!(([self.text isEqualToString:kTextEmpty]) && !_tokens.count)];
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
// Stop the cut, copy, select and selectAll appearing when the field is 'empty'.
if (action == @selector(cut:) || action == @selector(copy:) || action == @selector(select:) || action == @selector(selectAll:))
return ![self.text isEqualToString:kTextEmpty];
return [super canPerformAction:action withSender:sender];
}
- (BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
if (_selectedToken && touch.view == self) [self deselectSelectedToken];
return [super beginTrackingWithTouch:touch withEvent:event];
}
#pragma mark Token Handling
- (TIToken *)addTokenWithTitle:(NSString *)title {
return [self addTokenWithTitle:title representedObject:nil];
}
- (TIToken *)addTokenWithTitle:(NSString *)title representedObject:(id)object {
if (title.length){
TIToken * token = [[TIToken alloc] initWithTitle:title representedObject:object font:self.font];
[self addToken:token];
return token;
}
return nil;
}
- (void)addTokensWithTitleList:(NSString *)titleList {
if ([titleList length] > 0) {
self.text = titleList;
[self tokenizeText];
}
}
- (void)addTokensWithTitleArray:(NSArray *)titleArray {
for (NSString *title in titleArray) {
[self addTokenWithTitle:title];
}
}
- (void)addToken:(TIToken *)token {
BOOL shouldAdd = YES;
if ([delegate respondsToSelector:@selector(tokenField:willAddToken:)]){
shouldAdd = [delegate tokenField:self willAddToken:token];
}
if (shouldAdd){
//[self becomeFirstResponder];
if (![_tokens containsObject:token]) {
[_tokens addObject:token];
if ([delegate respondsToSelector:@selector(tokenField:didAddToken:)]){
[delegate tokenField:self didAddToken:token];
}
}
[self addTokenToView:token];
}
}
- (void) addTokenToView:(TIToken *)token
{
[token addTarget:self action:@selector(tokenTouchDown:) forControlEvents:UIControlEventTouchDown];
[token addTarget:self action:@selector(tokenTouchUpInside:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:token];
[self layoutTokensAnimated:YES];
[self showOrHidePlaceHolderLabel];
[self setResultsModeEnabled:NO];
[self deselectSelectedToken];
}
- (void)removeToken:(TIToken *)token {
if (token == _selectedToken) [self deselectSelectedToken];
BOOL shouldRemove = YES;
if ([delegate respondsToSelector:@selector(tokenField:willRemoveToken:)]){
shouldRemove = [delegate tokenField:self willRemoveToken:token];
}
if (shouldRemove){
[token removeFromSuperview];
[_tokens removeObject:token];
[self layoutTokensAnimated:YES];
if ([delegate respondsToSelector:@selector(tokenField:didRemoveToken:)]){
[delegate tokenField:self didRemoveToken:token];
}
[self showOrHidePlaceHolderLabel];
[self setResultsModeEnabled:_forcePickSearchResult || _alwaysShowSearchResult];
}
}
- (void)removeAllTokens {
[_tokens enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(TIToken * token, NSUInteger idx, BOOL *stop) {
[self removeToken:token];
}];
[self setText:@""];
}
- (void)selectToken:(TIToken *)token {
[self deselectSelectedToken];
_selectedToken = token;
[_selectedToken setSelected:YES];
[self becomeFirstResponder];
[self setText:kTextHidden];
}
- (void)deselectSelectedToken {
[_selectedToken setSelected:NO];
_selectedToken = nil;
[self setText:kTextEmpty];
}
- (void)tokenizeText {
__block BOOL textChanged = NO;
if (![self.text isEqualToString:kTextEmpty] && ![self.text isEqualToString:kTextHidden] && !_forcePickSearchResult){
[[self.text componentsSeparatedByCharactersInSet:_tokenizingCharacters] enumerateObjectsUsingBlock:^(NSString * component, NSUInteger idx, BOOL *stop){
[self addTokenWithTitle:[component stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
textChanged = YES;
}];
}
if (textChanged) [self sendActionsForControlEvents:UIControlEventEditingChanged];
}
- (void)tokenTouchDown:(TIToken *)token {
if (_selectedToken != token){
[_selectedToken setSelected:NO];
_selectedToken = nil;
}
}
- (void)tokenTouchUpInside:(TIToken *)token {
if (_editable) [self selectToken:token];
}
- (CGFloat)layoutTokensInternal {
CGFloat topMargin = floor(self.font.lineHeight * 4 / 7);
CGFloat leftMargin = self.leftViewWidth + 12;
CGFloat hPadding = 8;
CGFloat rightMargin = self.rightViewWidth + hPadding;
CGFloat lineHeight = ceilf(self.font.lineHeight) + topMargin + 5;
_numberOfLines = 1;
_tokenCaret = (CGPoint){leftMargin, (topMargin - 1)};
[_tokens enumerateObjectsUsingBlock:^(TIToken * token, NSUInteger idx, BOOL *stop){
[token setFont:self.font];
[token setMaxWidth:(self.bounds.size.width - rightMargin - (_numberOfLines > 1 ? hPadding : leftMargin))];
if (token.superview){
if (_tokenCaret.x + token.bounds.size.width + rightMargin > self.bounds.size.width){
_numberOfLines++;
_tokenCaret.x = (_numberOfLines > 1 ? hPadding : leftMargin);
_tokenCaret.y += lineHeight;
}
[token setFrame:(CGRect){_tokenCaret, token.bounds.size}];
_tokenCaret.x += token.bounds.size.width + 4;
if (self.bounds.size.width - _tokenCaret.x - rightMargin < 50){
_numberOfLines++;
_tokenCaret.x = (_numberOfLines > 1 ? hPadding : leftMargin);
_tokenCaret.y += lineHeight;
}
}
}];
return ceilf(_tokenCaret.y + lineHeight);
}
#pragma mark View Handlers
- (void)layoutTokensAnimated:(BOOL)animated {
CGFloat newHeight = [self layoutTokensInternal];
if (self.bounds.size.height != newHeight){
// Animating this seems to invoke the triple-tap-delete-key-loop-problem-thing™
[UIView animateWithDuration:(animated ? 0.3 : 0) animations:^{
[self setFrame:((CGRect){self.frame.origin, {self.bounds.size.width, newHeight}})];
[self sendActionsForControlEvents:(UIControlEvents)TITokenFieldControlEventFrameWillChange];
} completion:^(BOOL complete){
if (complete) [self sendActionsForControlEvents:(UIControlEvents)TITokenFieldControlEventFrameDidChange];
}];
}
}
- (void)setResultsModeEnabled:(BOOL)flag {
[self setResultsModeEnabled:flag animated:YES];
}
- (void)setResultsModeEnabled:(BOOL)flag animated:(BOOL)animated {
[self layoutTokensAnimated:animated];
if (_resultsModeEnabled != flag){
//Hide / show the shadow
[self.layer setMasksToBounds:!flag];
UIScrollView * scrollView = self.scrollView;
[scrollView setScrollsToTop:!flag];
[scrollView setScrollEnabled:!flag];
CGFloat offset = ((_numberOfLines == 1 || !flag) ? 0 : _tokenCaret.y - floor(self.font.lineHeight * 4 / 7) + 1);
[scrollView setContentOffset:CGPointMake(0, self.frame.origin.y + offset) animated:animated];
}
_resultsModeEnabled = flag;
}
#pragma mark Left / Right view stuff
- (void)setPromptText:(NSString *)text {
_promptText = text;
if (text){
UILabel * label = (UILabel *)self.leftView;
if (!label || ![label isKindOfClass:[UILabel class]]){
label = [[UILabel alloc] initWithFrame:CGRectZero];
[self setLeftView:label];
[self setLeftViewMode:UITextFieldViewModeAlways];
}
[label setTextColor:_promptColor];
[label setText:text];
[label setFont:[UIFont systemFontOfSize:(self.font.pointSize + 1)]];
[label sizeToFit];
}
else
{
[self setLeftView:nil];
}
[self layoutTokensAnimated:YES];
}
- (void)setPromptColor:(UIColor *)promptColor
{
_promptColor = promptColor;
[self setPromptText:_promptText];
}
- (void)setPlaceholder:(NSString *)placeholder {
if (placeholder){
UILabel * label = _placeHolderLabel;
if (!label || ![label isKindOfClass:[UILabel class]]){
label = [[UILabel alloc] initWithFrame:CGRectMake(_tokenCaret.x + 3, _tokenCaret.y + 2, self.rightView.bounds.size.width, self.rightView.bounds.size.height)];
[label setTextColor:[UIColor colorWithWhite:0.75 alpha:1]];
_placeHolderLabel = label;
[self addSubview: _placeHolderLabel];
}
[label setText:placeholder];
[label setFont:[UIFont systemFontOfSize:(self.font.pointSize + 1)]];
[label sizeToFit];
}
else
{
[_placeHolderLabel removeFromSuperview];
_placeHolderLabel = nil;
}
[self layoutTokensAnimated:YES];
}
#pragma mark Layout
- (CGRect)textRectForBounds:(CGRect)bounds {
if ([self.text isEqualToString:kTextHidden]) return CGRectMake(0, -20, 0, 0);
CGRect frame = CGRectOffset(bounds, _tokenCaret.x + 2, _tokenCaret.y + 3);
frame.size.width -= (_tokenCaret.x + self.rightViewWidth + 10);
return frame;
}
- (CGRect)editingRectForBounds:(CGRect)bounds {
return [self textRectForBounds:bounds];
}
- (CGRect)placeholderRectForBounds:(CGRect)bounds {
return [self textRectForBounds:bounds];
}
- (CGRect)leftViewRectForBounds:(CGRect)bounds {
return ((CGRect){{8, ceilf(self.font.lineHeight * 4 / 7)}, self.leftView.bounds.size});
}
- (CGRect)rightViewRectForBounds:(CGRect)bounds {
return ((CGRect){{bounds.size.width - self.rightView.bounds.size.width - 6,
bounds.size.height - self.rightView.bounds.size.height - 6}, self.rightView.bounds.size});
}
- (CGFloat)leftViewWidth {
if (self.leftViewMode == UITextFieldViewModeNever ||
(self.leftViewMode == UITextFieldViewModeUnlessEditing && self.editing) ||
(self.leftViewMode == UITextFieldViewModeWhileEditing && !self.editing)) return 0;
return self.leftView.bounds.size.width;
}
- (CGFloat)rightViewWidth {