ios - 无法弹出 UIImagePickerController

Question

我有一个 UIImagePickerController带有自定义叠加层。我正在尝试实现一个取消按钮，它只会弹出 UIImagePickerController .我的设置代码如下:

- (void)tapPhoto {

    //setup the picker
    self.picker = [[UIImagePickerController alloc] init];
    self.picker.delegate = self;
    self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    self.picker.cameraDevice=UIImagePickerControllerCameraDeviceFront;
    self.picker.showsCameraControls=NO;

    self.cameraOverlay = [[CameraOverlay alloc] init];
    UIImage *camoverlayImage = self.cameraOverlay.cameraOverlayImage;
    UIImageView *camoverlayImageView = [[UIImageView alloc] initWithImage:camoverlayImage];
    camoverlayImageView.frame=CGRectMake(0, 0, self.cameraOverlay.previewSize.width , self.cameraOverlay.previewSize.height);

    //init the control view
    UIView *cameraControls= [[UIView alloc] initWithFrame:CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height)];
    [cameraControls addSubview:camoverlayImageView];

    //Shutter Button
    UIButton *button = [[UIButton alloc] init];//70*70
    [button setBackgroundImage:[UIImage imageNamed:@"cameraoff"] forState:UIControlStateNormal];
    [button setBackgroundImage:[UIImage imageNamed:@"cameraon"] forState:UIControlStateHighlighted];
    button.frame = CGRectMake(([[UIScreen mainScreen] bounds].size.width/2)-70/2, [[UIScreen mainScreen] bounds].size.height-70-10, 70 , 70);
    [button addTarget:self action:@selector(takePhoto) forControlEvents:UIControlEventTouchUpInside];
    [cameraControls addSubview:button];


    UIButton *button2 = [[UIButton alloc] init];
    [button2 setTitle:@"Cancel" forState:UIControlStateNormal];
    [button2 addTarget:self action:@selector(cancelPhoto) forControlEvents:UIControlEventTouchUpInside];
    button2.frame = CGRectMake(5, [[UIScreen mainScreen]bounds].size.height-30, 0, 0);
    [button2 sizeToFit];
    [cameraControls addSubview:button2];

    [self.picker setCameraOverlayView:cameraControls];
    [self presentViewController:self.picker animated:YES completion:NULL];

}

-(void)cancelPhoto{

    NSLog(@"photo canceled");
    [self.navigationController pushViewController:self.picker animated:YES];



}

-(void)takePhoto{
    //this will auto trigger the control
    [self.picker takePicture];
}

我试图从导航 Controller 中弹出它，但没有任何运气。我也试过 [self.picker popViewControllerAnimated:YES]; .谁能给我任何关于为什么这不起作用的指示？谢谢

Answer 1

您正在(正确地)展示您的选择器:

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

present 的反义词不是 push 或 pop，而是 dismiss :

[self dismissViewControllerAnimated:YES completion:nil];