Question

我正在使用图片选择器拍摄照片并将其保存到数据库中。一旦我将其保存在数据库中，我就会发出一个警报视图，说明图像已保存，当我点击确定时，我需要关闭图像选择器视图，我需要显示另一个视图。

这是我的

-(void)viewDidAppear:(BOOL)animated{

[super viewDidAppear:animated];

[self takePic];


}

-(void)takePic{

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate =self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;

[self presentViewController:picker animated:YES completion:NULL];

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

if (alertView.tag==1) {

    if (buttonIndex==0) {
        UIImagePickerController *picker;
         [picker dismissViewControllerAnimated:YES completion:NULL]; // here i am not able to dismiss the image picker view
        Tab *vc=[self.storyboard instantiateViewControllerWithIdentifier:@"Tabbar"];
        [self presentViewController:vc animated:YES completion:nil];

    }
}


}

我可以忽略选择器视图，如果我没有放置视图中的[self takepic]确实出现。

我也试过

        [picker dismissViewControllerAnimated:YES completion:^{
            [self presentViewController:vc animated:YES completion:NULL];
        }];

但我无法忽略选择器视图。我收到警告：＆＃34;警告：尝试显示其视图不在窗口层次结构中！＆＃34;

任何人都可以告诉我，如何解雇选择器视图

Answer 1

试试这个。我想这会对你有所帮助在您的代码中，您正在通过UIImagePickerController *picker;对UIImagePicker进行新的引用你应该解雇相同的图像选择器

-(void)takePicture{

    picker = [[UIImagePickerController alloc] init];
    picker.delegate =self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    [self presentViewController:picker animated:YES completion:NULL];

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

    if (alertView.tag==1) {

        if (buttonIndex==0) {
            [picker dismissViewControllerAnimated:YES completion:NULL]; // here i am not able to dismiss the image picker view

        }
    }
}

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

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"Hello" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    alert.tag = 1;
    [alert show];
}

Answer 2

您需要制作一个属性来打开和关闭相机

@property (assign) BOOL *makeCameraOff;


-(void)viewDidAppear:(BOOL)animated{


if (makeCameraOff==NO) {

    [self performSelector:@selector(takePic) withObject:nil afterDelay:0.3];
}
}

-(void)takePic{

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate =self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;

[self presentViewController:picker animated:YES completion:NULL];

}


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

  //here change the BOOL value to YES,so that you can dismiss the camera view
makeCameraOff=YES;

[picker dismissViewControllerAnimated:YES completion:NULL];


 }


- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {


// your code to present the view controller you need;
 }

单击按钮时关闭UIImagePickerView

2 个答案: