iOS建立背景色image

-(UIImage *)createColorImage:(UIColor *)color
{
    // 使用顏色建立UIImage
    CGSize imageSize = CGSizeMake(MAIN_SCREEN_WIDTH, MAIN_SCREEN_HEIGHT);
    UIGraphicsBeginImageContextWithOptions(imageSize, 0, [UIScreen mainScreen].scale);
    [color set];
    UIRectFill(CGRectMake(0, 0, imageSize.width, imageSize.height));
    UIImage *pressedColorImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return pressedColorImg;
}