一个UIButton控件的状态设置和事件的执行

[btnCountDown setTitle:@"重新发送短信" forState:UIControlStateDisabled];//禁用的状态显示,这个状态下的btn按钮是不可以监听事件的

 

//下面的btn按钮是可以监听事件的

[btnCountDown setTitle:@"发送验证码" forState:UIControlStateNormal];

[btnCountDown setTitle:@"发送验证码" forState:UIControlStateHighlighted];

[btnCountDown setTitle:@"发送验证码" forState:UIControlStateDisabled];

btnCountDown.enabled = YES;