konvertieren uiview zu .png image

Question

Ich arbeite an iphone und ich nehme die Unterklasse von UIView und in draw rect Methode ich mache etwas Design. Ich möchte diese Ansicht im .png-Format konvertieren.

Vielen Dank im Voraus.

Answer 1

UIGraphicsBeginImageContext(myView.frame.size); 
    [myView.layer renderInContext:UIGraphicsGetCurrentContext()]; 
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    NSData *data=UIImagePNGRepresentation(viewImage); 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; 
    NSString *strPath = [documentsDirectory stringByAppendingPathComponent:@"myimage.png"]; 
    [data writeToFile:strPath atomically:YES]; 

Answer 2

UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow]; 
    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) 
     UIGraphicsBeginImageContextWithOptions(YourView.frame.size, NO, [UIScreen mainScreen].scale); 
    else 
     UIGraphicsBeginImageContext(keyWindow.bounds.size); 

    CGContextRef context = UIGraphicsGetCurrentContext(); 
    [keyWindow.layer renderInContext:context]; 
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); 
    UIImageWriteToSavedPhotosAlbum(img, nil, nil, nil); 
    UIGraphicsEndImageContext();