捕获 UIView 并另存为图像 [英] Capture UIView and Save as Image

问题描述

首先我在 UIImageView 上添加 UILable 然后在我截取 UIView 之后，图像不能正确捕获 UIView Frame 我还附上了图片网址.

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];

解决方案

您可以截取任何 UIView 的屏幕截图或捕获任何 UIView 并将其保存为图像下面的代码.

- (UIImage *)captureView {//如果需要隐藏控件CGRect rect = [self.view bounds];UIGraphicsBeginImageContext(rect.size);CGContextRef 上下文 = UIGraphicsGetCurrentContext();[self.view.layer renderInContext:context];UIImage *img = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();返回图像；}

First of i Add the UILable on UIImageView and then after i screenshot the UIView, the image not proper capture the UIView Frame i also attach the image url.

1) Original Image Link:

2) After Capture the image Link:

Code:

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];

解决方案

You can take the screenshots of any UIView or capture any UIView and save it as an image with below code.

- (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;

}

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