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简介

使用继承uislider并重写一些方法并不能实现改变滑块大小的要求，这里需要一张与要求的大小相同的图片设置到滑块上就可以了

代码

• 下面是裁剪的代码

+ (UIImage*)image:(UIImage*)image scaleToSize:(CGSize)size{
    UIGraphicsBeginImageContext(size);//size为CGSize类型，即你所需要的图片尺寸
    [image drawInRect:CGRectMake(0,0, size.width, size.height)];
    UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return scaledImage;
}

• 下面是设置滑块图片的代码

UIImage *tempImage = [UIImage imageNamed:@"optometry_icon_point"];
        UIImage *tempImage1 = [UIImage image:tempImage scaleToSize:CGSizeMake(50, 50)];
        [tempView setThumbImage:tempImage1 forState:UIControlStateNormal];
        [tempView setThumbImage:tempImage1 forState:UIControlStateHighlighted];