QQTabBarController

一个自定义UITabBarController可以自定义tabBar的高度，添加中间的按钮，超出tabBar的bounds的按钮，超出范围也能响应点击。并且可以适配原生的UITabBarItem模型

Example

To run the example project, clone the repo, and run pod install from the Example directory first. 将整个仓库clone下来，在 Example 文件夹的目录下执行 pod install ，然后运行Example

Installation

QQTabBarController is available through CocoaPods. To install it, simply add the following line to your Podfile:

QQCorner 支持通过 CocoaPods 安装，简单地添加下面这一行到你的 Podfile 中

pod 'QQTabBarController'

Useage

Swift Version

创建一个控制器，继承于QQTabBarController，如需更多自定义设置，可实现协议QQTabBarConfiguration，可以设置tabBarButton中的文字frame和图片frame，设置tabBar的高度，以及额外高度。

import QQTabBarController

class ExampleViewController: QQTabBarController {

    override func viewDidLoad() {
        
        //要在super之前给config赋值
        config = self
        
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        tabBar.backgroundImage = UIImage.qq_withColor(UIColor.cyan)
        tabBar.shadowImage = UIImage()
        
        for i in 0..<4 {
            let vc = UIViewController()
            vc.title = "根控制器" + String(i)
            let nav = UINavigationController(rootViewController: vc)
            nav.title = "导航" + String(i)
            nav.tabBarItem.image = UIImage.qq_withColor(UIColor.blue)
            nav.tabBarItem.selectedImage = UIImage.qq_withColor(UIColor.magenta)
            nav.tabBarItem.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.gray], for: .normal)
            nav.tabBarItem.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.red], for: .selected)
            addChild(nav)
        }
        
        let centerBtn = UIButton(type: .custom)
        centerBtn.frame = CGRect(x: 0, y: 0, width: 77, height: 77)
        centerBtn.setBackgroundImage(UIImage.qq_withColor(UIColor.red), for: .normal)
        centerBtn.addTarget(self, action: #selector(centerBtnClicked(_:)), for: .touchUpInside)
        addCenterBtn(centerBtn)
    }
    
    @objc private func centerBtnClicked(_ btn: UIButton) {
        print("centerBtnClicked")
    }

}

extension ExampleViewController: QQTabBarConfiguration {
    
    func heightForTabBar() -> CGFloat {
        return 60
    }
    
}

Objective-C Version

因为需要继承，OC是不可以继承Swift的类的，所以OC中，我们创建一个工具类来专门处理它。当然在Swift中也可以这么做。

TabbarTool.h

#import <UIKit/UIKit.h>

@interface TabBarTool : NSObject

+ (UIViewController *)tabBarController;
    
@end

TabbarTool.m

#import "TabBarTool.h"
#import "QQTabBarController-Swift.h"
#import "QQCorner.h"

@interface TabBarTool () <QQTabBarConfiguration>

@end

@implementation TabBarTool

static TabBarTool *tool;

+ (instancetype)allocWithZone:(struct _NSZone *)zone {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        tool = [super allocWithZone:zone];
    });
    return tool;
}

+ (UIViewController *)tabBarController {
    //这里的tool是单例哦~一定要有值，否则被释放了协议中的方法就不会走了。
    TabBarTool *tool = [[TabBarTool alloc] init];
    QQTabBarController *tabBarVC = [[QQTabBarController alloc] init];
    tabBarVC.config = tool;
    tabBarVC.tabBar.backgroundImage = [[UIImage imageNamed:@"tabbar_bg"] resizableImageWithCapInsets:UIEdgeInsetsMake(30, 0, 0, 0) resizingMode:UIImageResizingModeStretch];
    tabBarVC.tabBar.shadowImage = [[UIImage alloc] init];
    
    for (int i = 0; i < 4; i++) {
        UIViewController *vc = [[UIViewController alloc] init];
        vc.title = [NSString stringWithFormat:@"跟控制器%d", i];
        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
        nav.title = [NSString stringWithFormat:@"导航%d", i];
        
        nav.tabBarItem.image = [UIImage imageWithQQCorner:^(QQCorner *corner) {
            corner.fillColor = [UIColor magentaColor];
            corner.radius = QQRadiusMakeSame(10);
        } size:CGSizeMake(20, 20)];
        nav.tabBarItem.selectedImage = [UIImage imageWithQQCorner:^(QQCorner *corner) {
            corner.fillColor = [UIColor greenColor];
            corner.radius = QQRadiusMakeSame(10);
        } size:CGSizeMake(20, 20)];
        
        [nav.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor grayColor]} forState:UIControlStateNormal];
        [nav.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor redColor]} forState:UIControlStateSelected];
        
        [tabBarVC addChildViewController:nav];
    }
    
    UIButton *centerBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    //x值是无效的，这个按钮一定是居中的
    centerBtn.frame = CGRectMake(0, -8, 60, 60);
    [centerBtn setBackgroundImage:[UIImage imageWithColor:[UIColor redColor] size:centerBtn.bounds.size cornerRadius:QQRadiusMakeSame(30)] forState:UIControlStateNormal];
    [centerBtn addTarget:self action:@selector(centerBtnClicked:) forControlEvents:UIControlEventTouchUpInside];
    
    [tabBarVC addCenterBtn:centerBtn];

    return tabBarVC;
}

+ (void)centerBtnClicked:(UIButton *)btn {
    NSLog(@"centerBtnClicked");
}

#pragma mark - QQTabBarConfiguration
- (CGFloat)heightForTabBar {
    return 60;
}

- (CGFloat)extraTopMargin {
    return 15;
}

- (CGRect)imageRectForContentRect:(CGRect)contentRect {
    return CGRectMake(0, 5, contentRect.size.width, contentRect.size.height * 0.6);
}

- (CGRect)titleRectForContentRect:(CGRect)contentRect {
    CGFloat titleY = contentRect.size.height * 0.6;
    return CGRectMake(0, titleY, contentRect.size.width, contentRect.size.height - titleY - 10);
}

@end

AppDelegate 中，设置rootVC

#import "TabBarTool.h"
self.window.rootViewController = [TabBarTool tabBarController];

Author

qinqi777, [email protected]

License

QQTabBarController is available under the MIT license. See the LICENSE file for more info.