ios - 捕获 UIView 并另存为图像

Question

首先，我在 UIImageView 上添加了 UILable，然后在截取 UIView 后，图像无法正确捕获 UIView Frame 我还附上了图片 url。

1) Original Image Link:

2) After Capture the image Link:

代码:

UIGraphicsBeginImageContext(viewImage.frame.size);
[viewImage.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *vwImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

NSData *data=UIImagePNGRepresentation(vwImage);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// NSString *imgName = [NSString stringWithFormat:imagename];
NSString *strPath = [documentsDirectory stringByAppendingPathComponent:imagename];
[data writeToFile:strPath atomically:YES];

Answer 1

您可以使用以下代码截取任何 UIView 的屏幕截图或捕获任何 UIView 并将其保存为图像。

- (UIImage *)captureView {

    //hide controls if needed
    CGRect rect = [self.view bounds];

    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [self.view.layer renderInContext:context];   
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return img;

}