文字轉圖片

+ (UIImage*)imageWithIcon:(NSString*)iconCode size:(NSUInteger)size color:(UIColor*)color fontSize:(NSInteger)font {
    CGSize imageSize = CGSizeMake(size, size);
    UIGraphicsBeginImageContextWithOptions(imageSize, NO, [[UIScreen mainScreen] scale]);
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, size, size)];
    label.font = [UIFont systemFontOfSize:kWidthScale(font)];
    label.text = iconCode;
    if(color){
        label.textColor = color;
    }
    label.textAlignment = NSTextAlignmentCenter;
    label.numberOfLines = 0;
    [label.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *retImage = UIGraphicsGetImageFromCurrentImageContext();
    return retImage;
}