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使用UIButton时需要注意的是:
1.UIButton的创建有专门的类方法(buttonWithType:,UILabel没有);
2.UIButton常用的属性包括:frame、titile、tag等;
3.UIButton使用addTarget方法关联处理方法,一个UIButton可以有多个不同的按钮响应方法,多个UIButton也可以共享一个处理方法(用tag做区分);
// 创建文件按钮 - (void) createRectUI { // 穿件圆角矩形按钮 UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn1.frame = CGRectMake(100, 100, 100, 50); [btn1 setTitle:@"按钮1" forState:UIControlStateNormal]; btn1.titleLabel.font = [UIFont systemFontOfSize:18]; [self.view addSubview:btn1]; UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn2.frame = CGRectMake(100, 200, 100, 50); [btn2 setTitle:@"按钮2" forState:UIControlStateNormal]; btn2.titleLabel.font = [UIFont systemFontOfSize:18]; [self.view addSubview:btn2]; btn1.tag = 101; [btn1 addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside]; btn2.tag = 102; [btn2 addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside]; } - (void) btnPressed : (UIButton*) btn { NSInteger tag = btn.tag; if(tag == 101){ NSLog(@"btn1 pressed!"); }else{ NSLog(@"btn2 pressed!"); } }
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原文地址:http://www.cnblogs.com/sunzhenxing19860608/p/5840138.html