源码地址：前去查看链接
/**
将 UIView 转换成 UIImage
@param view 将要转换的View
@return 新生成的 UIImage 对象
*/
- (UIImage *)yj_convertCreateImageWithUIView:(UIView *)view{
UIGraphicsBeginImageContext(view.bounds.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[view.layer renderInContext:ctx];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
