xcode 将 uiview 转换为 .png 图像
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时间：2020-09-15 00:24:29 来源:igfitidea点击:
convert uiview to .png image
提问by Chandni
I am working on iphone and I take the subclass of UIView and in draw rect method I am making some design. I want to convert this view in .png format.
我在 iphone 上工作，我采用了 UIView 的子类，并在 draw rect 方法中进行了一些设计。我想将此视图转换为 .png 格式。
Thanks in advance.
提前致谢。
回答by Dhawal
UIGraphicsBeginImageContext(myView.frame.size);
[myView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *data=UIImagePNGRepresentation(viewImage);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *strPath = [documentsDirectory stringByAppendingPathComponent:@"myimage.png"];
[data writeToFile:strPath atomically:YES];
回答by Mani
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
UIGraphicsBeginImageContextWithOptions(YourView.frame.size, NO, [UIScreen mainScreen].scale);
else
UIGraphicsBeginImageContext(keyWindow.bounds.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[keyWindow.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIImageWriteToSavedPhotosAlbum(img, nil, nil, nil);
UIGraphicsEndImageContext();
