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#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//创建view对象
UIView *myview = [[UIView alloc]init];
myview.frame = CGRectMake(50, 100, 150, 100);
[self.view addSubview:myview];
//设置背景颜色
myview.backgroundColor = [UIColor greenColor];
//设置是否能接受事件,默认是YES
myview.userInteractionEnabled = NO;
//创建button
UIButton * btn = [[UIButton alloc]init];
btn.frame = CGRectMake(50, 100, 250, 40);
[myview addSubview:btn];
btn.backgroundColor = [UIColor redColor];
//注册事件
[btn addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchDown];
//1.如果父视图不能接受事件,则子视图也不能接受事件
//2.子视图超出父视图的部分不能接受事件
[btn removeFromSuperview];
[self.view addSubview:btn];
[self.view insertSubview:btn belowSubview:myview];
//3.如果上面视图覆盖下面视图而且能接受事件,则下面视图不会收到事件了
//4.UILabel和UIImageView 默认不能接受事件
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - button处理方法
- (void)onClick:(UIButton *)btn
{
NSLog(@"button press!");
}
@end
UIView-4-EventForViews(在view上加入button时候的事件处理)
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原文地址:http://www.cnblogs.com/wanghengheng/p/4814966.html