加入代理

@interface ImagePickeriewController ()<UIActionSheetDelegate>

@end

新增button的點選響應，響應事件中程式碼如下

-(void) photoImageClicked{

    UIActionSheet *photoSheet;
    photoSheet = [[UIActionSheet alloc] initWithTitle:@"選擇" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照"
 
, @"從相簿選擇", nil];
    photoSheet.tag = 255;
    [photoSheet showInView:_photoView];
}

delegate

-(void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

    if(actionSheet.tag == 255){

        if (buttonIndex == 0) {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil
 
 message:@"拍照" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:NULL];
                [alert show];
        }else if (buttonIndex == 1){
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"從相簿選擇" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:NULL];
                [alert show];
        }else
 
{
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"取消" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:NULL];
                [alert show];
        }
    }
}