触发UIButton长按事件

UIButton *aBtn=[UIButton buttonWithType:UIButtonTypeCustom];

    [aBtn setFrame:CGRectMake(40, 100, 60, 60)];

    [aBtn setBackgroundImage:[UIImage imageNamed:@"111.png"]forState:UIControlStateNormal];

//button点击事件

    [aBtn addTarget:self action:@selector(btnShort:)forControlEvents:UIControlEventTouchUpInside];

    //button长按事件

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizeralloc] initWithTarget:self action:@selector(btnLong:)]; 

    longPress.minimumPressDuration = 0.8; //定义按的时间

    [aBtn addGestureRecognizer:longPress];

-(void)btnLong:(UILongPressGestureRecognizer *)gestureRecognizer{

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan) {

        NSLog(@"长按事件");

        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"消息"message:@"确定删除该模式吗？" delegate:self cancelButtonTitle:@"取消"otherButtonTitles:@"删除", nil];

        [alert show];

    }

}