我有一個顯示9個UIImageViews的應用程序,我試圖添加用戶刪除它們的功能。因此,我將其全部設置完畢,併爲用戶設置了一個警報視圖,以確認他們想要刪除他們點擊的圖像。當我在警報視圖中單擊是,應用程序崩潰和調試狀態:UIControl和setImage問題
2012-04-04 18:19:44.311 AppName的[1857:F803] - [UIControl setImage:]:無法識別的選擇發送到實例0x6aac690
2012-04-04 18:19:44.312 AppName的[1857:F803]終止應用程序由於未捕獲的異常 'NSInvalidArgumentException',原因: ' - [UIControl setImage:]:無法識別的選擇發送到實例0x6aac690'
奇怪的部分是我沒有在我的任何代碼中調用setImage。這是我正在使用的代碼:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
if (imageView.image == nil) {
imageView.image = img;
self.array = [NSMutableArray arrayWithObject:[NSData dataWithData:UIImagePNGRepresentation(imageView.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView2.image == nil) {
imageView2.image = img;
NSLog(@"The image is a %@", imageView);
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView2.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
}
.....
- (IBAction)deleteButtonPressed:(id)sender {
NSLog(@"Sender is %@", sender);
UIAlertView *deleteAlertView = [[UIAlertView alloc] initWithTitle:@"Delete"
message:@"Are you sure you want to delete this photo?"
delegate:self
cancelButtonTitle:@"No"
otherButtonTitles:@"Yes", nil];
[deleteAlertView show];
int imageIndex = ((UIButton *)sender).tag;
deleteAlertView.tag = imageIndex;
}
- (void)alertView: (UIAlertView *) alertView
clickedButtonAtIndex: (NSInteger) buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex]) {
NSLog(@"User Clicked Yes. Deleting index %d of %d", alertView.tag, [array count]);
NSLog(@"The tag is %i", alertView.tag);
[self.array removeObjectAtIndex: alertView.tag];
NSLog(@"After deleting item, array count = %d", [array count]);
NSLog(@"Returned view is :%@, in view: %@", [self.view viewWithTag:alertView.tag], self.view);
((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil;
}
[self.user setObject:self.array forKey:@"images"];
}
我加了斷點,似乎是導致崩潰的路線是:
((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil;
該行的目的是從UI中刪除圖像。我不知道爲什麼這行代碼導致這個錯誤,但代碼似乎是正確的。有問題的nib文件是UIControl,而不僅僅是UIView,所以這可能是問題。任何幫助或建議非常感謝,謝謝!
謝謝,是的,當我試圖改變它時發現了。我不知道該怎麼做,但我仍然對Objective-C非常陌生。 – John 2012-04-05 00:57:40
查看UIKit類文檔 – Otium 2012-04-05 01:02:43