iOS 将UIView控件转换成UIImage对象

/**
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;
}