如何在iphone sdk編輯後保存圖像？

Question

我想將旋轉的圖像保存到照片庫。我有一個顯示圖像的UIImageView。我使用下面的代碼片段來翻轉圖像。自轉換圖像視圖後，旋轉的圖像會顯示。但是，保存圖像時，我得到原始圖像（不翻轉）。如何保存翻轉的圖像？

CGAffineTransform transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(degrees)); 
    image.transform = transform; 

Answer 1

簡單地採取的圖像的屏幕截圖或其中它被保存的視圖，它會被保存，因爲它是它是否已經被旋轉或翻轉....這裏是提供一些代碼....

-(IBAction)saveToPhotoGallery:(id)sender 
{ 
    UIGraphicsBeginImageContext(baseView.frame.size); 
    [baseView.layer renderInContext:UIGraphicsGetCurrentContext()]; 
    UIImage *attachimage = [[UIImage alloc]initWithData:Data]; 
    UIImage *viImage=UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    attachimage = viImage; 
    UIImageWriteToSavedPhotosAlbum(viImage, nil, nil, nil); 

    UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Save" message:@"Saved to photo gallery" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil,nil]; 
    [alert show]; 
} 
} 

希望這有助於！