我有一个显示 9 个 UIImageViews 的应用程序，我正在尝试添加用户删除它们的功能。因此，我设置了所有内容，并为用户设置了一个警报视图，以确认他们想要删除他们点击的图像。当我在警报视图中单击是时，应用程序崩溃并且调试器状态：
2012-04-04 18:19:44.311 AppName[1857:f803]-[UIControl setImage:]：无法识别的选择器发送到实例 0x6aac690
2012-04-04 18:19:44.312 AppName[1857:f803] 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[UIControl setImage:]：无法识别的选择器发送到实例 0x6aac690”
奇怪的是我没有在我的任何代码中调用 setImage 。这是我正在使用的代码：
- (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"];
}
我添加了断点，似乎导致崩溃的行是：
((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil;
该行的目的是从 UI 中删除图像。我不确定为什么该行会导致此错误，但代码似乎是正确的。有问题的 nib 文件是一个 UIControl，而不仅仅是一个 UIView，所以这可能是问题所在。非常感谢任何帮助或建议，谢谢！