一个强大的UITextView子类，三大功能，让TextView自带placeholder属性、自动高度、监听编辑状态，支持UITableViewCell内嵌
pod 'ZYTextView', :git => 'https://github.com/xuzeyu/ZYTextView.git'
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
__weak typeof(self) weakSelf = self;
if (indexPath.row == 0) {
Test_Cell *cell = [tableView dequeueReusableCellWithIdentifier:@"Test_Cell"];
cell.textView.placeholder = @"固定高度";
cell.textView.returnKeyType = UIReturnKeyNext;
[cell.textView addTextDidChangeHandler:^(ZYTextView *textView) {
NSLog(@"内容改变了:%@", textView.text);
}];
[cell.textView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(60);
}];
return cell;
}else if (indexPath.row == 1) {
Test_Cell *cell = [tableView dequeueReusableCellWithIdentifier:@"Test_Cell"];
cell.textView.placeholder = @"固定高度，设置最大字符串长度为10";
cell.textView.returnKeyType = UIReturnKeyNext;
[cell.textView addTextDidChangeHandler:^(ZYTextView *textView) {
NSLog(@"内容改变了:%@", textView.text);
}];
cell.textView.maxLength = 10;
[cell.textView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(60);
}];
return cell;
}else if (indexPath.row == 2) {
Test_Cell *cell = [tableView dequeueReusableCellWithIdentifier:@"Test_Cell"];
cell.textView.placeholder = @"固定高度，禁止换行，禁止空格，点击return自动关闭键盘";
cell.textView.disableNewline = cell.textView.disableWhitespace = cell.textView.isResignFirstResponderAfterReturn = YES;
cell.textView.returnKeyType = UIReturnKeyDone;
[cell.textView addTextDidChangeHandler:^(ZYTextView *textView) {
NSLog(@"内容改变了:%@", textView.text);
}];
[cell.textView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(60);
}];
return cell;
}else if (indexPath.row == 3) {
Test_Cell *cell = [tableView dequeueReusableCellWithIdentifier:@"Test_Cell"];
cell.textView.placeholder = @"自动增加高度";
cell.textView.returnKeyType = UIReturnKeyNext;
[cell.textView addTextDidChangeHandler:^(ZYTextView *textView) {
NSLog(@"内容改变了:%@", textView.text);
}];
cell.textView.textViewHeightDidChanged = ^(ZYTextView *textView, CGFloat currentTextViewHeight) {
[textView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(currentTextViewHeight).priorityHigh();
}];
[weakSelf.tableView beginUpdates];
[weakSelf.tableView endUpdates];
};
cell.textView.text = @"";
return cell;
}else if (indexPath.row == 4) {
Test_Cell *cell = [tableView dequeueReusableCellWithIdentifier:@"Test_Cell"];
cell.textView.placeholder = @"自动增加高度，设置最小高度和最大高度";
cell.textView.returnKeyType = UIReturnKeyNext;
[cell.textView addTextDidChangeHandler:^(ZYTextView *textView) {
NSLog(@"内容改变了:%@", textView.text);
}];
cell.textView.textViewHeightDidChanged = ^(ZYTextView *textView, CGFloat currentTextViewHeight) {
[textView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(currentTextViewHeight).priorityHigh();
}];
[weakSelf.tableView beginUpdates];
[weakSelf.tableView endUpdates];
};
cell.textView.text = @"";
cell.textView.minHeight = 60;
cell.textView.maxHeight = 80;
return cell;
}
return nil;
}
@interface ZYTextView : UITextView
/**
便利构造器.
*/
+ (instancetype)textView;
/**
设定文本开始编辑Block回调. (切记弱化引用, 以免造成内存泄露.)
*/
- (void)addTextDidBeginEditingHandler:(ZYTextViewHandler)beginEditingHandler;
/**
设定文本改变Block回调. (切记弱化引用, 以免造成内存泄露.) 需要在setText:方法调用之前，不然获取不到setText:的改变
*/
- (void)addTextDidChangeHandler:(ZYTextViewHandler)eventHandler;
/**
设定文本结束编辑Block回调. (切记弱化引用, 以免造成内存泄露.)
*/
- (void)addTextDidEndEditingHandler:(ZYTextViewHandler)endEditingHandler;
/**
设定达到最大长度Block回调. (切记弱化引用, 以免造成内存泄露.)
*/
- (void)addTextLengthDidMaxHandler:(ZYTextViewHandler)maxHandler;
/**
最大限制文本长度, 默认为无穷大, 即不限制, 如果被设为 0 也同样表示不限制字符数.
*/
@property (nonatomic, assign) NSUInteger maxLength;
/**
圆角半径.
*/
@property (nonatomic, assign) IBInspectable CGFloat cornerRadius;
/**
边框宽度.
*/
@property (nonatomic, assign) IBInspectable CGFloat borderWidth;
/**
边框颜色.
*/
@property (nonatomic, strong) IBInspectable UIColor *borderColor;
/**
placeholder, 会自适应TextView宽高以及横竖屏切换, 字体默认和TextView一致.
*/
@property (nonatomic, copy) IBInspectable NSString *placeholder;
/**
placeholder文本颜色, 默认为#C7C7CD.
*/
@property (nonatomic, strong) IBInspectable UIColor *placeholderColor;
/**
placeholder文本字体, 默认为UITextView的默认字体.
*/
@property (nonatomic, strong) UIFont *placeholderFont;
/**
placeholder文本最大行数
*/
@property (nonatomic, assign) NSInteger placeholderMaximumNumberOfLines;
/**
placeholder文本换行模式， 默认为NSLineBreakByCharWrapping
*/
@property (nonatomic, assign) NSLineBreakMode placeholderLineBreakMode;
/**
UITextView的text和placeholder四边间距 默认UIEdgeInsetsMake(8, 3, 8, 3)
*/
@property (nonatomic, assign) IBInspectable UIEdgeInsets zy_textContainerInset;
/**
是否禁止换行 默认为NO
*/
@property (nonatomic, assign) BOOL disableNewline;
/**
是否禁止空格 默认为NO
*/
@property (nonatomic, assign) BOOL disableWhitespace;
/**
禁止第一个字符输入空格 默认为YES
*/
@property (nonatomic, assign) BOOL disableFirstWhitespace;
/**
是否点击Return按钮自动取消编辑状态 默认为NO
*/
@property (nonatomic, assign) BOOL isResignFirstResponderAfterReturn;
/**
是否允许长按弹出UIMenuController, 默认为YES.
*/
@property (nonatomic, assign, getter=isCanPerformAction) BOOL canPerformAction;
/**
获取自动高度的block回调
*/
@property (nonatomic, copy) ZYTextViewHeightDidChangedBlock textViewHeightDidChanged;
/**
最大高度，如果需要随文字改变高度的时候使用
*/
@property (nonatomic, assign) CGFloat maxHeight;
/**
最小高度，如果需要随文字改变高度的时候使用
*/
@property (nonatomic, assign) CGFloat minHeight;
/**
该属性返回一个经过处理的 `self.text` 的值, 去除了首位的空格和换行.
*/
@property (nonatomic, readonly) NSString *formatText;
@end