UIActionSheet

UIActionSheet是在iOS弹出的选择按钮项，可以添加多项，并为每项添加点击事件。

-(IBAction)sheetshow:(id)sender{
    UIActionSheet *sheetnow=[[UIActionSheet alloc]initWithTitle:@"相片设置功能" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"相片移除" otherButtonTitles:@"确认", nil];
    [sheetnow showInView:self.view];
}
//代理

<UIActionSheetDelegate>
//代理方法

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    NSLog(@"%ld",buttonIndex);
    if (buttonIndex==1) {
        UIImageView *view=[[UIImageView alloc]initWithFrame:self.view.frame];
        view.backgroundColor=[UIColor blackColor];
        [self.view addSubview:view];
    }
}