iPhone SDK - 如何在UIImagePickerController中禁用图片预览？

Question

使用UIImagePickerController拍照后有没有办法禁用图像预览？我想在用户按下快门释放按钮后立即关闭ImagePicker.

Answer 1

我在这里问了一个类似的问题

我的解决方案是在默认的UIImagePickerControllerView之上创建一个自定义视图.

我下载了增强现实的例子

然后你可以使用OverlayView.m和OverlayView.h将它们添加到你的项目中:我创建了自定义选择器工具栏,选择器和overlayView全局,以便我可以在项目的任何地方访问它们.

在ViewController.h中

@class OverlayView;

@interface ViewController //bla bla...
{
UIImagePickerController * picker;
UIToolbar *toolBar;
OverlayView *overlayView; 
}

我创建了工具栏的控件,一个相机按钮和取消按钮

// toolbar - handy if you want to be able to exit from the image picker...
            toolBar=[[[UIToolbar alloc] initWithFrame:CGRectMake(0, 480-55, 320, 55)] autorelease];
            toolBar.barStyle =  UIBarStyleBlackOpaque;
            NSArray *items=[NSArray arrayWithObjects:
                            [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel  target:self action:@selector(cancelPicture)] autorelease],
                            [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace  target:nil action:nil] autorelease],
                            [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera  target:self action:@selector(shootPicture)] autorelease],
                            [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace  target:nil action:nil] autorelease],
                            [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace  target:nil action:nil] autorelease],
                            nil];
            [toolBar setItems:items];

            // create the overlay view
            overlayView=[[[OverlayView alloc] initWithFrame:CGRectMake(0, 0, 320, 480-44)] autorelease];
            // important - it needs to be transparent so the camera preview shows through!
            overlayView.opaque=NO;
            overlayView.backgroundColor=[UIColor clearColor];

                    // parent view for our overlay
        UIView *parentView=[[[UIView alloc] initWithFrame:CGRectMake(0,0,320, 480)] autorelease];
        [parentView addSubview:overlayView];
        [parentView addSubview:toolBar];

        // configure the image picker with our overlay view
        picker=[[UIImagePickerController alloc] init];
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;

        // hide the camera controls
        picker.showsCameraControls=NO;
        picker.wantsFullScreenLayout = YES;

取消方法

- (IBAction)cancel {
    // Don't pass current value to the edited object, just pop.
    [self.navigationController popViewControllerAnimated:YES];
}

(shootPictureMethod):

-(void) shootPicture {

    [picker takePicture];

}

要退出而不显示预览,只需在didFinishPickingImage方法中拍摄照片后关闭视图

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo 
{
//do whatever

[self dismissModalViewControllerAnimated:YES];
}