捕獲非活動UIView作爲UIImage

Question

下面的代碼工作正常，但只抓住在您的屏幕上可見的UIView。 我該如何獲取一個當前沒有顯示的UIView？

謝謝！

//Take a screenshot of the view... 
UIGraphicsBeginImageContext(View_1.frame.size); 
    [View_1.layer renderInContext:UIGraphicsGetCurrentContext()]; 
UIImage *View_1 = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 
UIImageWriteToSavedPhotosAlbum(View_1, nil, nil, nil); 

//...and attach it as an image to the email 
NSData *myData3 = UIImagePNGRepresentation(View_1); 
[picker addAttachmentData:myData3 mimeType:@"image/png" fileName:@"screenshot2"]; 

Answer 1

如果你的意思是在view.hidden = YES;隱象，那麼你將無法繪製，而不是隱藏它，你可以從超級視圖後，將其刪除，或繪圖之前甚至稱view.hidden = NO;，然後view.hidden = YES;已經繪

例如

//Take a screenshot of the view... 
UIGraphicsBeginImageContext(View_1.frame.size); 
//Set it to visible 
View_1.hidden = NO; 
[View_1.layer renderInContext:UIGraphicsGetCurrentContext()]; 
UIImage *View_1 = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 
UIImageWriteToSavedPhotosAlbum(View_1, nil, nil, nil); 
//Hide it again 
View_1.hidden = YES; 
//...and attach it as an image to the email 
NSData *myData3 = UIImagePNGRepresentation(View_1); 
[picker addAttachmentData:myData3 mimeType:@"image/png" fileName:@"screenshot2"];