我们所常见的滑块是系统提供的UISlider,但是很多时候slider不能满足我们的需要，比如样式，比如可点击确定进度，所以就会自己封装了，博主这里封装了一个slider，可以手动设置value，进度条颜色，进度条高度，滑块大小，滑块颜色，滑块背景图片，如果什么都不设置，则有默认的值。
看代码：
- (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { _value = 0; _widthSameHeight = 30; [self setSlierUI]; } return self; } - (void)setSlierUI { _baseView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height)]; [self addSubview:_baseView]; _preSliderView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 20)]; _preSliderView.center = _baseView.center; _preSliderView.layer.cornerRadius = 10; _preSliderView.backgroundColor = [UIColor grayColor]; _preSliderView.clipsToBounds = YES; [_baseView addSubview:_preSliderView]; _lastSliderView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 0, 20)]; _lastSliderView.backgroundColor = [UIColor blueColor]; [_preSliderView addSubview:_lastSliderView]; UITapGestureRecognizer *tapGes = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapMoving:)]; [_preSliderView addGestureRecognizer:tapGes]; _sliderBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; _sliderBtn.frame = CGRectMake(0, 0, _widthSameHeight, _widthSameHeight); _sliderBtn.center = CGPointMake(0, _baseView.center.y); _sliderBtn.backgroundColor = [UIColor lightGrayColor]; if (_slImage == nil) { _sliderBtn.layer.borderWidth = 0.5; _sliderBtn.layer.borderColor = [UIColor grayColor].CGColor; _sliderBtn.backgroundColor = [UIColor lightGrayColor]; } else { [_sliderBtn setImage:_slImage forState:UIControlStateNormal]; } _sliderBtn.layer.cornerRadius = _widthSameHeight / 2; [_sliderBtn addTarget:self action:@selector(dragMoving:withEvent:)forControlEvents: UIControlEventTouchDragInside]; [_baseView addSubview:_sliderBtn]; } - (void)tapMoving:(UITapGestureRecognizer *)tap { CGPoint point = [tap locationInView:_preSliderView]; _sliderBtn.center = CGPointMake(point.x , _baseView.center.y); _lastSliderView.frame = CGRectMake(0, 0, point.x, 20); _value = point.x / _preSliderView.bounds.size.width; } - (void)dragMoving: (UIButton *)btn withEvent:(UIEvent *)event { CGPoint point = [[[event allTouches] anyObject] locationInView:self]; CGFloat x = point.x; if(x<=0) { point.x = 0; } if(x >= self.bounds.size.width) { point.x = self.bounds.size.width; } point.y = self.frame.size.height / 2; btn.center = point; _lastSliderView.frame = CGRectMake(0, 0, point.x, 20); _value = point.x / _preSliderView.bounds.size.width; } - (void)setValue:(CGFloat)value { _value = value; _sliderBtn.center = CGPointMake(_value * _baseView.bounds.size.width , _baseView.center.y); _lastSliderView.frame = CGRectMake(0, 0, _sliderBtn.center.x, 20); } - (void)setSlImage:(UIImage *)slImage { _slImage = slImage; [_sliderBtn setImage:_slImage forState:UIControlStateNormal]; } - (void)setSlHeight:(CGFloat)slHeight { _slHeight = slHeight; if (_slHeight >= 2 && _slHeight <= 20) { _preSliderView.frame = CGRectMake(0, 0, _baseView.bounds.size.width, _slHeight); _preSliderView.center = _baseView.center; } } - (void)setPreBackgroundColor:(UIColor *)preBackgroundColor { _preBackgroundColor = preBackgroundColor; _preSliderView.backgroundColor = _preBackgroundColor; } - (void)setLastBackgroundColor:(UIColor *)lastBackgroundColor { _lastBackgroundColor = lastBackgroundColor; _lastSliderView.backgroundColor = _lastBackgroundColor; } - (void)setWidthSameHeight:(CGFloat)widthSameHeight { _widthSameHeight = widthSameHeight; _sliderBtn.frame = CGRectMake(0, 0, _widthSameHeight, _widthSameHeight); _sliderBtn.center = CGPointMake(_value * _baseView.bounds.size.width, _baseView.center.y); _sliderBtn.layer.cornerRadius = _widthSameHeight / 2; } - (void)setSliderBackgroundColor:(UIColor *)sliderBackgroundColor { _sliderBackgroundColor = sliderBackgroundColor; _sliderBtn.backgroundColor = _sliderBackgroundColor; }
需要看set和get方法的请下载Demo查看，这里有一个小问题，本来想用Masonry的，但是没有封装好，所以不能用Masonry对这个封装的slider进行操作，否则就不能用了，不过不用担心，这个slider用的是相对布局对整体布局没什么影响，使用过程中如有需要，请自行调整里面的布局，后面博主会进行改造。
下载地址：https://github.com/codeliu6572/MySlider
