**由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：'应用程序试图在目标上显示nil模态视图控制器

Question

Trying to make a camera function to take a photo or choose an exciting photo. When I press "Infoga bild"(choose a exciting photo it crashes but when I take a new photo it works. But the image doesn't show in the image view.

Getting the error ** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Application tried to present a nil modal view controller on target *** First throw call stack:

I open the controller view from a tableview cell.

the code for the camera function:

#import "FMEImageview.h"
@implementation FMEImageview

- (IBAction)Tabild {
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:picker animated:YES completion:nil];


}

- (IBAction)Infogabild{
picker2 = [[UIImagePickerController alloc] init];
picker2.delegate = self;
[picker2 setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:picker animated:YES completion:nil];


}

- (void) imagePickerControllerDidCancel:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary*)info{

image = [info objectForKey:UIImagePickerControllerOriginalImage];
[ImageView setImage: image];
[self dismissViewControllerAnimated:YES completion:nil];
}

- (void) imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[self dismissViewControllerAnimated:YES completion:nil];
}

-(void) viewDidLoad {

[super viewDidLoad];

}

-(void) didReceiveMemoryWarning{

[super didReceiveMemoryWarning];
}

@end

The .h code:

@interface FMEImageview : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate> {
UIImagePickerController *picker;
UIImagePickerController *picker2;
UIImage *image;

IBOutlet UIImageView *ImageView;

}

- (IBAction)Tabild;
- (IBAction)Infogabild;

@end

Thx in advance and i hope my code or question doesn't suck to much. I'm new to objective-c

Answer 1

当您在其中创建的控制器名为picker2时，您似乎正在尝试在Infogabild中呈现Picker。