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 ，然后我截取 UIView ，图片不正确捕获 UIView 框架我还附上图片网址。

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<$ c $的屏幕截图c> UIView 或捕获任何 UIView 并将其保存为带有以下代码的图像。

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

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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