How to take screenshot for the entire screen no ma

问题:

Before iOS7 I use UIGetScreenImage() function to take the screenshot easily, but in iOS7, it becomes deprecated, now are there any good methods to archive this?Thank you!

Addition: I need take screenshot for the entire screen at any view

回答1:

I came across the same problem, but have no ideas how to solve it.

I tried IOSurface - IOS Private API - Capture screenshot in background , which works well in some apps but returns a black screen in games.

Then I tried this app https://github.com/k06a/UIView-FastScreenshot/blob/master/UIView%2BFastScreenshot.m , which works well using private apis, but I can't compile it using theos, always telling me "Undefined symbols for architecture armv7: CARenderServerRenderDisplay". Edit: I figured out how to compile it using theos, but returns am empty image.

Also, https://github.com/coolstar/RecordMyScreen works well in iOS7, but it's not open source now, so I can't find out how it capture the whole screen.

Edit: RecordMyScreen's code works on iOS7 as a springboard tweak, you can refer to this file https://github.com/coolstar/RecordMyScreen/blob/master/RecordMyScreen/CSScreenRecorder.m this method "- (void)_captureShot:(CMTime)frameTime;"

回答2:

Alternative way to replace UIGetScreenImage()

CGImageRef screen = UIGetScreenImage();

The above code is one line of code to capture the screen, but Apple does not open the above API UIGetScreenImage() for the public app. i.e. fail to upload to Apple for approval. So the alternative way to capture screen and save it are listed as below.

- (void)captureAndSaveImage
{    

    // Capture screen here... and cut the appropriate size for saving and uploading
    UIGraphicsBeginImageContext(self.view.bounds.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    // crop the area you want 
    CGRect rect;
    rect = CGRectMake(0, 10, 300, 300);    // whatever you want
    CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], rect);
    UIImage *img = [UIImage imageWithCGImage:imageRef]; 
    CGImageRelease(imageRef);
    UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
    imageView.image = img; // show cropped image on the ImageView     
}

// this is option to alert the image saving status
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
    UIAlertView *alert;

    // Unable to save the image  
    if (error)
        alert = [[UIAlertView alloc] initWithTitle:@"Error" 
                                           message:@"Unable to save image to Photo Album." 
                                          delegate:self cancelButtonTitle:@"Dismiss" 
                                 otherButtonTitles:nil];
    else // All is well
        alert = [[UIAlertView alloc] initWithTitle:@"Success" 
                                           message:@"Image saved to Photo Album." 
                                          delegate:self cancelButtonTitle:@"Ok" 
                                 otherButtonTitles:nil];
    [alert show];
    [alert release];
}

some of link help you how-to-legally-replace-uigetscreenimage

回答3:

UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

This code can help you in getting a screenshot of the self.view which is whole of the screen of the iPhone no matter which app is in front.If you have used any layers in your view then the layers will not be included in the screenshot and for that you have to use self.view.layer.

回答4:

The UIView class has an method called: resizableSnapshotViewFromRect:afterScreenUpdates:withCapInsets .

But i have never worked with this method so i cannot tell you more about it.

And this post: Capture UIView as UIImage shows how you get the returned UIView into an image.

hope it is usefull.