相信很多朋友会遇到在TabBar中添加按钮,并要求点击按钮能够实现一些功能,但是当我们自定义的时候,怎么才能在控制器中响应?通常我会用代理或者block,block性能更好,建议使用.
自定义TabBar类 .h
#import <UIKit/UIKit.h>typedef void(^myBlock) (NSArray *composeButton);//给block起别名,用数组来存放点击的Button@interface ZSTabBar : UITabBar@property (nonatomic,strong) myBlock composeButtonBlock;//定义block@end
.m
#import "ZSTabBar.h"@interface ZSTabBar ()@property (nonatomic,strong) UIButton *composeButton;//TabBar中间的撰写按钮@end
@implementation ZSTabBar-(instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame]; [self addSubview:self.composeButton]; return self;
}
//设置TabBar的子控件
-(void)layoutSubviews{
[super layoutSubviews]; CGFloat tabBarW = [UIScreen mainScreen].bounds.size.width / ; int index = ; UIView *tabbar = [[UIView alloc]init]; for (tabbar in self.subviews) {
//如果TabBar子控件类型是UITabBarButton,这里是判断的关键
Class class = NSClassFromString(@"UITabBarButton"); if ([tabbar isKindOfClass:class]) { //给类型属于UITabBarButton设置frame.高一定不能写0
tabbar.frame = CGRectMake(tabBarW * index, , tabBarW, self.bounds.size.height); index ++;
//因为中间的撰写按钮不属于UITabBarButton类,所以要另进行判断
if (index == ) {
index ++;
}
}
} self.composeButton.center = CGPointMake(self.frame.size.width / , self.frame.size.height / );
}#pragma mark -- 对撰写按钮懒加载
-(UIButton *)composeButton{
if (_composeButton == nil) {
_composeButton = [[UIButton alloc]init];
//设置背景图
[_composeButton setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button"] forState:UIControlStateNormal]; [_composeButton setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button_highlighted"] forState:UIControlStateHighlighted];
//设置图片
[_composeButton setImage:[UIImage imageNamed:@"tabbar_compose_icon_add"] forState:UIControlStateNormal];
[_composeButton setImage:[UIImage imageNamed:@"tabbar_compose_icon_add_highlighted"] forState:UIControlStateHighlighted]; [_composeButton sizeToFit]; //点击事件
[_composeButton addTarget:self action:@selector(composeButtonClick:) forControlEvents:UIControlEventTouchUpInside]; }
return _composeButton;
}#pragma mark --撰写按钮的点击事件-(void)composeButtonClick: (UIButton *)send{
//最好要判断一下block
if (self.composeButtonBlock) {
//将按钮添加到block中
self.composeButtonBlock(@[send]);
}
}@end
标签控制器的.m文件
#import "ZSMainFrameController.h"
#import "ZSHomeViewController.h"
#import "ZSDiscoveryViewController.h"
#import "ZSMessageViewController.h"
#import "ZSMineViewController.h"
#import "ZSTabBar.h"//自定义TabBar
@implementation ZSMainFrameController-(void)viewDidLoad{
[super viewDidLoad]; self.view.backgroundColor = [UIColor whiteColor]; ZSTabBar *tabBar = [[ZSTabBar alloc]init];
//TabBar是ZSTabBar类中私有属性,通过KVC赋值 关键
[self setValue:tabBar forKey:@"tabBar"];
//自定义TabBar的block
tabBar.composeButtonBlock = ^(NSArray *composeButton){
//从数组取出Button
UIButton *compoeButton = composeButton[];
//按钮的点击事件
[self composeButtonClick:compoeButton];
}; ZSHomeViewController *homeVC = [[ZSHomeViewController alloc]init];
[self addChildVC:homeVC title:@"首页" imageName:@"tabbar_home"]; ZSMessageViewController *messageVC = [[ZSMessageViewController alloc]init];
[self addChildVC:messageVC title:@"消息" imageName:@"tabbar_message_center"]; ZSDiscoveryViewController *discoverVC = [[ZSDiscoveryViewController alloc]init];
[self addChildVC:discoverVC title:@"发现" imageName:@"tabbar_discover"]; ZSMineViewController *mineVC = [[ZSMineViewController alloc]init];
[self addChildVC:mineVC title:@"我" imageName:@"tabbar_profile"];}#pragma mark -- 添加子控制器
-(void)addChildVC:(UIViewController *)childVC title:(NSString *)title imageName:(NSString *)imageName{ childVC.title = title;
//未选中图片
childVC.tabBarItem.image = [UIImage imageNamed:imageName];
//选中图片
NSString *selectedImageName = [NSString stringWithFormat:@"%@_selected",imageName];
childVC.tabBarItem.selectedImage = [UIImage imageNamed:selectedImageName]; UINavigationController *naVC = [[UINavigationController alloc]initWithRootViewController:childVC]; [self addChildViewController:naVC];}#pragma mark -- 中间撰写按钮的点击事件
-(void)composeButtonClick:(UIButton *)send{
在这里就可以实现撰写按钮的方法
}@end
内容比较简单,希望能给一些新手提供帮助,如果有更好的方法希望大家一起谈论分享.
