在iphone中调整图像大小和填充屏幕？

我异步获取图像，并在小帧（135126）和大帧（280325）上显示它们，图像可以是任何大小，但帧是固定的，必须填充帧，现在我的问题是，如何调整图像大小以填充这些大小的帧，但质量不应降低，而且图像的方向也不应降低，例如UIViewContentModeScaleAspectFill属性如何

        UIImage *image = [actualImage you want to resize];
        UIImage *tempImage = nil;
        CGSize targetSize = CGSizeMake(196,110);
        UIGraphicsBeginImageContext(targetSize);

        CGRect thumbnailRect = CGRectMake(0, 0, 0, 0);
        thumbnailRect.origin = CGPointMake(0.0,0.0);
        thumbnailRect.size.width  = targetSize.width;
        thumbnailRect.size.height = targetSize.height;

        [image drawInRect:thumbnailRect];

        tempImage = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

        You can use this tempImage , it will be resized Image

希望有帮助