如何捕獲UIView作爲當前可見幀外的圖像？

Question

有沒有什麼辦法可以將UIView捕獲到當前不可見或者不在框架中的UIImage。下面的代碼我現在使用：

UIGraphicsBeginImageContextWithOptions(_myView.bounds.size, _myView.opaque, 0.0f); 
[theView drawViewHierarchyInRect:_myView.bounds afterScreenUpdates:NO]; 
UIImage * snapshotImage = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 

Answer 1

嘗試這個 -

-(UIImage *)imageFromView:(UIView *)myView{ 
    UIGraphicsBeginImageContextWithOptions(myView.bounds.size, myView.opaque, [UIScreen mainScreen].scale); 
    [myView.layer renderInContext:UIGraphicsGetCurrentContext()]; 
    UIImage * image = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    return image; 
    }