iOS之点击按钮切换背景图片
现在的项目的按钮切换的时候，都会添加一个效果，就是点击后更换一个背景图片，而原来被点击的按钮的图片恢复原来的背景图片
首先，在.h文件中写一个BOOL的属性，
@property(nonatomic ,strong) UIButton *landButton;
@property(nonatomic ,strong) UIButton * weiXinButton;
@property(nonatomic ,strong) UIButton * phoneButton;
@property(nonatomic ,assign) BOOL isClick;
然后在.m文件中：
- (void)viewDidLoad
{
[super viewDidLoad];
//self.view.backgroundColor = [UIColor redColor];
_landButton = [UIButton buttonWithType:UIButtonTypeCustom];
_landButton.frame = CGRectMake(150, 100, 60, 60);
[_landButton setBackgroundImage:[UIImage imageNamed:@"after.jpg"] forState:UIControlStateNormal];
_landButton.tag = 110;
[_landButton addTarget:self action:@selector(aa:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_landButton];
_weiXinButton = [UIButton buttonWithType:UIButtonTypeCustom];
_weiXinButton.frame = CGRectMake(150, 200, 60, 60);
[_weiXinButton setBackgroundImage:[UIImage imageNamed:@"before.jpg"] forState:UIControlStateNormal];
[_weiXinButton addTarget:self action:@selector(aa:) forControlEvents:UIControlEventTouchUpInside];
_weiXinButton.tag = 111;
[self.view addSubview:_weiXinButton];
_phoneButton = [UIButton buttonWithType:UIButtonTypeCustom];
_phoneButton.frame = CGRectMake(150, 300, 60, 60);
[_phoneButton setBackgroundImage:[UIImage imageNamed:@"before.jpg"] forState:UIControlStateNormal];
[_phoneButton addTarget:self action:@selector(aa:) forControlEvents:UIControlEventTouchUpInside];
_phoneButton.tag = 112;
[self.view addSubview:_phoneButton];
}
//点击按钮时触发的事件，思想就是，点击按钮时按钮更换背景图片，而其他图片恢复原始状态
-(void)changeBackImage:(UIButton *)sender
{