iOS使用代码截图

/**

 *  截图代码

 *

 *  @param view 需要截图的view

 *  @param rect 需要截取的区域

 *

 *  @return 返回截取的对象

 */

+ (UIImage *)viewSnapshot:(UIView *)view withInRect:(CGRect)rect

{

    UIGraphicsBeginImageContext(view.bounds.size);

    [view.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    CGImageRef imageRef = CGImageCreateWithImageInRect(image.CGImage,rect);

    image = [UIImage imageWithCGImage:imageRef];

    CGImageRelease(imageRef);

    return image;

}