将uiview转换为.png图像 [英] convert uiview to .png image

问题描述

我正在研究iphone，我采用了UIView的子类，并且在绘制rect方法中我正在进行一些设计。我想以.png格式转换此视图。

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.

提前致谢。

推荐答案

    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];

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