func a(){
let alert = UIAlertView(title:"注意", message:"放棄當前修改？", delegate:self, cancelButtonTitle:"取消", otherButtonTitles:"確定")
alert.show()
alert.tag = 111
alert.show()
}
func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int) {
if alertView.tag == 111 {
if buttonIndex == 1 {
}else {
}
}
}
UIAlertViewDelegate 代理協議別忘了加上
