将文字和图片合成到一张图上

@implementation UIButton (Utilities)

- (instancetype _Nullable )secondLevelButtonWithIcon:(NSString *)icon IconSize:(CGSize)iconSize Frame:(CGRect)frame Title:(NSString *)title TitleColor:(UIColor*)titleColor Font:(CGFloat)font SpaceHeigt:(CGFloat)spaceHeight{
    UIImage * pictureImage = [UIImage imageNamed:icon];
    CGSize size = frame.size;
    //获取当前上下文
    UIGraphicsBeginImageContextWithOptions(size, false, [UIScreen mainScreen].scale);
    [[UIColor whiteColor] setFill];
    UIRectFill(CGRectMake(0, 0, size.width, size.height));
    //写入图片
    [pictureImage drawInRect:CGRectMake((size.width - iconSize.width) * 0.5, 0 , iconSize.width, iconSize.height)];
    //写入文字
    UILabel * label = [[UILabel alloc]init];
    label.text = title;
    label.textColor = titleColor;
    label.textAlignment = NSTextAlignmentCenter;
    label.font = [UIFont systemFontOfSize:font];
    [label drawTextInRect:CGRectMake(0, iconSize.height+spaceHeight, size.width, font+1)];
    //生成图片
    UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    //将映射的图片生成一个按钮
    UIButton * button  = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setBackgroundImage:image forState:UIControlStateNormal];
    [button setBackgroundImage:image forState:UIControlStateHighlighted];
    button.frame = frame;
    return button;
}

@end