UIImagepicker立即消失iPhone上顯示

Question

我有2個故事板iPhone和iPad。 從UITableviewcontroller上的按鈕我想用UIImagepicker選擇一個圖像。

在iPad上，這個工作正常，在iPhone上，UIImagepicker顯示的時間很短，然後他消失了。

調用代碼與iPhone上的iPad相同，因爲我可以看到故事板是idenitical。我在尋找幾個小時，並且看不清爲什麼Imagepicker在iPhone和iPad上消失。 有沒有人有這種行爲的想法？ UIImagePicker沒有做任何事情就會消失的原因是什麼？

- (void) go { 
    UIImagePickerController *ipc = [[UIImagePickerController alloc]init]; 
    [ipc setSourceType:UIImagePickerControllerSourceTypeSavedPhotosAlbum]; 
    ipc.delegate=self; 
    [self presentViewController:ipc animated:YES completion:^{}]; 
    } 
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{ 
    NSLog(@"imagePickerControllerDidCancel"); 
    [self dismissViewControllerAnimated:YES completion:^{}]; 
    } 

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
    [self.navigationController dismissViewControllerAnimated:NO completion:^{}]; 
    [self dismissViewControllerAnimated:NO completion:^{}]; 
     NSLog(@"didFinishPickingMediaWithInfo"); 
    } 

在iPhone上，日誌「imagePickerControllerDidCancel」從不顯示！

Answer 1

店揀貨機在強大的類屬性，而不是一個局部變量，就像這樣：

@property(nonatomic, strong) UIImagePickerController *imagePickerController

...

- (void) go { 
    self.imagePickercontroller = [[UIImagePickerController alloc]init]; 
    self.imagePickercontroller.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; 
    self.imagePickercontroller.delegate=self; 
    [self presentViewController:ipc animated:YES completion:nil]; 
}