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UIImagePickerController问题 - iPhone

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我正在使用 UIImagePickerController 从相机中以 portrait 和 landscape 模式捕捉照片，我的应用中的允许方向是 portrait & landscape . 在纵向模式下，我的相机叠加工作正常 . 但是对于横向模式，在捕获照片默认相机覆盖标签"Preview"并使用＆重拍动作按钮后，从相机捕获的实时图像也将进入纵向模式 . 我是否需要使用自动调整大小 . 如何在横向模式下设置完整的相机叠加视图（第2个屏幕截图）？

这是我的代码 UIImagePickerController ：

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO){
    NSLog(@"Camera not available");
    return;
}

imagePickerController.delegate = self;
imagePickerController.allowsEditing = YES;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:imagePickerController animated:YES completion:nil];

对于方向，这里是我的视图控制器类的代码，我使用图像选择器控制器..

- (BOOL)shouldAutorotate {
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;  
}

这是我的相机初始视图，当我的设备处于横向模式时：

enter image description here

从相机捕获照片后的第二个视图：

enter image description here

我的视图控制器，我在显示图像选择器只在纵向模式，但从相机捕获照片应该使用图像选择器工作肖像和风景 . 我希望在横向模式下，我的相机覆盖（附加的第二个屏幕截图）应该在视图的底部显示它们的预览标签栏 . 是否可以使用默认相机覆盖或我需要创建自定义相机覆盖视图？请帮我修理一下 . 这是我的应用程序中的主要问题 .

谢谢 .

ios camera uiimagepickercontroller

2 回答

  • 0

    不，你不能用"UIImagePickerController " kindly take a look at documentation做到这一点 .

    重要说明：UIImagePickerController类仅支持纵向模式 . 此类旨在按原样使用，不支持子类化 . 此类的视图层次结构是私有的，不得修改，但有一个例外 . 您可以将自定义视图分配给cameraOverlayView属性，并使用该视图显示其他信息或管理相机界面与代码之间的交互 .

    但您可以使用Assets Library Framework访问图像列表并创建自己的图像选择器 .

    你也可以尝试一下git：ELCImagePickerController .

    快乐的编码 .

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  • 0

    您可以尝试下面的代码来修复您的Uiimage，您可能需要稍微调整一下以获得正确的方向，

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

    //--> get the fixed orientation image
  UIImage *fixedImage = [self fixOrientation:originalImage];


 }


- (UIImage *)fixOrientation:(UIImage*)takenImage {
// --> check the correct orientation if yes return the same.
if (takenImage.imageOrientation == UIImageOrientationUp) return takenImage;

// --> if taken image orientation is wrong adjust the image as per the correct orientation.
CGAffineTransform transform = CGAffineTransformIdentity;

switch (takenImage.imageOrientation) {
        case UIImageOrientationDown:
        case UIImageOrientationDownMirrored:
        transform = CGAffineTransformTranslate(transform, takenImage.size.width, takenImage.size.height);
        transform = CGAffineTransformRotate(transform, M_PI);
        break;

        case UIImageOrientationLeft:
        case UIImageOrientationLeftMirrored:
        transform = CGAffineTransformTranslate(transform, takenImage.size.width, 0);
        transform = CGAffineTransformRotate(transform, M_PI_2);
        break;

        case UIImageOrientationRight:
        case UIImageOrientationRightMirrored:
        transform = CGAffineTransformTranslate(transform, 0, takenImage.size.height);
        transform = CGAffineTransformRotate(transform, -M_PI_2);
        break;
        case UIImageOrientationUp:
        case UIImageOrientationUpMirrored:
        break;
}

switch (takenImage.imageOrientation) {
        case UIImageOrientationUpMirrored:
        case UIImageOrientationDownMirrored:
        transform = CGAffineTransformTranslate(transform, takenImage.size.width, 0);
        transform = CGAffineTransformScale(transform, -1, 1);
        break;

        case UIImageOrientationLeftMirrored:
        case UIImageOrientationRightMirrored:
        transform = CGAffineTransformTranslate(transform, takenImage.size.height, 0);
        transform = CGAffineTransformScale(transform, -1, 1);
        break;
        case UIImageOrientationUp:
        case UIImageOrientationDown:
        case UIImageOrientationLeft:
        case UIImageOrientationRight:
        break;
}

//--> draw the calculated image above
CGContextRef ctx = CGBitmapContextCreate(NULL, takenImage.size.width, takenImage.size.height,
                                         CGImageGetBitsPerComponent(takenImage.CGImage), 0,
                                         CGImageGetColorSpace(takenImage.CGImage),
                                         CGImageGetBitmapInfo(takenImage.CGImage));
CGContextConcatCTM(ctx, transform);
switch (takenImage.imageOrientation) {
        case UIImageOrientationLeft:
        case UIImageOrientationLeftMirrored:
        case UIImageOrientationRight:
        case UIImageOrientationRightMirrored:

        CGContextDrawImage(ctx, CGRectMake(0,0,takenImage.size.height,takenImage.size.width), takenImage.CGImage);
        break;

    default:
        CGContextDrawImage(ctx, CGRectMake(0,0,takenImage.size.width,takenImage.size.height), takenImage.CGImage);
        break;
}

// return the new fixed image to display
CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
UIImage *img = [UIImage imageWithCGImage:cgimg];
CGContextRelease(ctx);
CGImageRelease(cgimg);
return img;
}

    您可以调整代码以获得所需的方向 .

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