ios - "imagePickerController: didFinishPickingMediaWithInfo:"的问题

Question

我不断收到未使用的变量警告。我正在尝试显示模态视图，用户在其中选择一张照片，我想在 UIImageView 中使用所选图像。

不确定这些信息是否足够，但非常感谢任何帮助。

- (IBAction) buttonPressed:(UIButton *)sender { 
    UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    picker.delegate = self;
    [self presentModalViewController:picker animated:YES];
    [picker release];
}

- (void) imagePickerController:( UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info { 
    UIImage *image = [info objectForKey: UIImagePickerControllerOriginalImage];
}

Answer 1

您收到警告是因为您不再使用图像对象。您必须将此图像保存在某个类对象中才能在代码中的某处使用它，如果您这样做，警告将自动消失。或者只是为了删除您可以执行的警告:

-(void) imagePickerController:( UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info {  
 UIImage *image;  
 image=[info objectForKey: UIImagePickerControllerOriginalImage];   
}