【深入浅出IOS开发】重写按钮控件2

来源：互联网发布：大学男生鞋子推荐知乎编辑：程序博客网时间：2024/06/11 23:23

对这里的内容进行第二次封装：

http://blog.csdn.net/ayaseeli/article/details/42204397

#import "MJTabBar.h"#import "MJTabBarButton.h"@interface MJTabBar()/** *  记录当前选中的按钮 */@property (nonatomic, weak) MJTabBarButton *selectedButton;@end@implementation MJTabBar- (void)addTabButtonWithName:(NSString *)name selName:(NSString *)selName{    // 创建按钮    MJTabBarButton *button = [MJTabBarButton buttonWithType:UIButtonTypeCustom];        // 设置图片    [button setBackgroundImage:[UIImage imageNamed:name] forState:UIControlStateNormal];    [button setBackgroundImage:[UIImage imageNamed:selName] forState:UIControlStateSelected];        // 添加    [self addSubview:button];    #warning UIControlEventTouchDown : 手指一按下去就会触发这个事件    // 监听    [button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchDown];        // 默认选中第0个按钮    if (self.subviews.count == 1) {        [self buttonClick:button];    }}- (void)layoutSubviews{    [super layoutSubviews];    int count = self.subviews.count;    for (int i = 0; i<count; i++) {        MJTabBarButton *button = self.subviews[i];        button.tag = i;                // 设置frame        CGFloat buttonY = 0;        CGFloat buttonW = self.frame.size.width / count;        CGFloat buttonH = self.frame.size.height;        CGFloat buttonX = i * buttonW;        button.frame = CGRectMake(buttonX, buttonY, buttonW, buttonH);    }}/** *  监听按钮点击 */- (void)buttonClick:(MJTabBarButton *)button{    // 0.通知代理    if ([self.delegate respondsToSelector:@selector(tabBar:didSelectButtonFrom:to:)]) {        [self.delegate tabBar:self didSelectButtonFrom:self.selectedButton.tag to:button.tag];    }        // 1.让当前选中的按钮取消选中    self.selectedButton.selected = NO;        // 2.让新点击的按钮选中    button.selected = YES;        // 3.新点击的按钮就成为了"当前选中的按钮"    self.selectedButton = button;}@end

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