UISlider 定制

1. .h文件

   #import 
   /**滑杆*/
   @interface YJL_Slider : UISlider
   @property(nonatomic , assign) CGFloat sliderHight;  //滑条的高度
   //初始化方法
   -(instancetype)initWithFrame:(CGRect)frame andSliderHight:(CGFloat)sliderHight;
   @end
   

2. .m文件

   #import "YJL_Slider.h"
   #define thumbBound_x 10
   #define thumbBound_y 20
   
   @implementation YJL_Slider
   {
         CGRect lastBounds;
   }
   -(instancetype)initWithFrame:(CGRect)frame andSliderHight:(CGFloat)sliderHight{
          if (self = [super initWithFrame:frame]) {
                  _sliderHight = sliderHight;
          }
          return self;
   }
   -(instancetype)init{
          if (self = [super init]) {
             //
          }
           return self;
    }
   
   
    -(CGRect)trackRectForBounds:(CGRect)bounds{
              if (_sliderHight == 0.00) {
                      _sliderHight = 4;
               }
                return CGRectMake(0, 0, self.frame.size.width, _sliderHight);
      }
   
   
     //- (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value{
     //        //y轴方向改变手势范围
     //        rect.origin.y = rect.origin.y - 10;
     //        rect.size.height = rect.size.height + 20;
     //        //
     //        rect.origin.x = rect.origin.x - 10;
     //        rect.size.width = rect.size.width + 20;
     //        return CGRectInset ([super thumbRectForBounds:bounds trackRect:rect value:value], 10 ,10);
     //}
   
     - (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value{
             rect.origin.x = rect.origin.x;
             rect.size.width = rect.size.width ;
             CGRect result = [super thumbRectForBounds:bounds trackRect:rect value:value];
              lastBounds = result;
              return result;
    }
   
    //滑杆上的点击事件
   - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{
          UIView *result = [super hitTest:point withEvent:event];
          if ((point.y >= -thumbBound_y) && (point.y < lastBounds.size.height + thumbBound_y)) {
              float value = 0.0;
             value = point.x - self.bounds.origin.x;
             value = value/self.bounds.size.width;
             value = value < 0? 0 : value;
             value = value > 1? 1: value;
             value = value * (self.maximumValue - self.minimumValue) + self.minimumValue;
             [self setValue:value animated:YES];
         }
         return result;
   

   }

   //扩大触摸点的响应范围
   - (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event{
        BOOL result = [super pointInside:point withEvent:event];
       if (!result && point.y > -10) {
              if ((point.x >= lastBounds.origin.x - thumbBound_x) && (point.x <= (lastBounds.origin.x + lastBounds.size.width + thumbBound_x)) && (point.y < (lastBounds.size.height + thumbBound_y))) {
              result = YES;
              }
       }
        return result;
   }
   @end