iOS的屏幕截图

Question

我将这些代码用于iOS的屏幕截图：

CGImageRef screen = UIGetScreenImage();
UIImage *image = [UIImage imageWithCGImage:screen];
CGImageRelease(screen);  
UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
CGRect screenshotFrame;  
CGImageRef screenshotRef = CGImageCreateWithImageInRect(screenshotRef, screenshotFrame);
UIImage * screenshot = [[(UIImage *)screenshotRef retain] autorelease];
CGImageRelease(screenshotRef);

但我的屏幕包含屏幕底部的工具栏。我不想在捕获的屏幕上显示工具栏。如何裁剪工具栏？如何修改我的代码？

Answer 1

我认为您可以捕获self.view层，因为它是根视图

if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
    //Retina display
    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, [UIScreen mainScreen].scale);
} else {
    UIGraphicsBeginImageContext(self.view.bounds.size);
}
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

玩得开心!

Answer 2

试试这个：

UIGraphicsBeginImageContext(/*CGRECT*/);     
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

在CGRect中，传递你想要截图的rect。

希望它能帮助你..

Answer 3

设置您的

CGRect screenshotFrame = CGRectMake(0, 0, 320, 436);
// 480(screen height) - 44(toolbar height) = 436