Xcode UIActionSheet

.h UIActionSheetDelegate 記得加 否則delegate:self warning

 
@interface ViewController : UIViewController
- (IBAction)displaySheet:(id)sender;

@end

.m

 
- (IBAction)displaySheet:(id)sender {
    UIActionSheet *sheet = [[UIActionSheet alloc]
       initWithTitle:@"你要怎麽處理檔案呢?"
       delegate:self
       cancelButtonTitle:@"取消"
       destructiveButtonTitle:@"載入"
       otherButtonTitles:@"儲存",@"刪除",nil];
 [sheet showInView:self.view];
}

// 反應使用者的動作
-(void) actionSheet:(UIActionSheet *) actionSheet 
clickedButtonAtIndex:(NSInteger) buttonIndex{