iOS自定义水平滚动条、进度条

ios自定义水平滚动条、进度条，继承uiview，可点击轨道、滑动滑块交互。

先看一下效果图：

简单说一下逻辑，新建一个继承uiview的类，分别给轨道、滑块添加uitapgesturerecognizer点击、uipangesturerecognizer滑动手势。获取偏移量，计算控件位置，刷新视图。

下面贴上核心代码：

显示视图，在控制器调用代码：

hwslider *slider = [[hwslider alloc] initwithframe:cgrectmake(10, 50, 300, 75)];
[self.view addsubview:slider];

hwslider：

#import <uikit/uikit.h>
 
@interface hwslider : uiview
 
@property (nonatomic, assign) nsinteger score;
 
@end
 
/*** ---------------分割线--------------- ***/
 
#import "hwslider.h"
#import "uiview+additions.h"
 
@interface hwslider ()
 
@property (nonatomic, weak) uiimageview *bubbleimage;
@property (nonatomic, weak) uiimageview *arrowimage;
@property (nonatomic, weak) uilabel *scorelabel;
@property (nonatomic, weak) uilabel *levellable;
@property (nonatomic, weak) uiview *trackview;
@property (nonatomic, weak) uiimageview *thumb;
 
@end
 
@implementation hwslider
 
- (instancetype)initwithframe:(cgrect)frame
{
 if (self = [super initwithframe:frame]) {
  _score = 10;
  self.backgroundcolor = [uicolor whitecolor];
  
  //气泡图片
  uiimageview *bubbleimage = [[uiimageview alloc] initwithframe:cgrectmake(self.bounds.size.width - 70, 0, 74, 35)];
  [bubbleimage setimage:[uiimage imagenamed:@"alert_teachereva_bubbleimage"]];
  [self addsubview:bubbleimage];
  _bubbleimage = bubbleimage;
  
  //分数标签
  uilabel *scorelabel = [[uilabel alloc] initwithframe:cgrectmake(self.bounds.size.width - 71.5, 0, 74, 28)];
  scorelabel.text = @"10";
  scorelabel.textcolor = [uicolor blackcolor];
  scorelabel.font = [uifont systemfontofsize:15.f];
  scorelabel.textalignment = nstextalignmentcenter;
  [self addsubview:scorelabel];
  _scorelabel = scorelabel;
  
  //气泡箭头
  uiimageview *arrowimage = [[uiimageview alloc] initwithframe:cgrectmake(self.bounds.size.width - 16.5, 26, 13, 13)];
  [arrowimage setimage:[uiimage imagenamed:@"alert_teachereva_arrowimage"]];
  [self addsubview:arrowimage];
  _arrowimage = arrowimage;
  
  //轨道可点击视图（轨道只设置了5pt，通过这个视图增加以下点击区域）
  uiview *tapview = [[uiview alloc] initwithframe:cgrectmake(0, 34, self.bounds.size.width, 20)];
  [tapview addgesturerecognizer:[[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(handletap:)]];
  [self addsubview:tapview];
  
  //轨道背景
  uiview *backview = [[uiview alloc] initwithframe:cgrectmake(0, 7.5, self.bounds.size.width, 5)];
  backview.backgroundcolor = [uicolor graycolor];
  backview.layer.cornerradius = 2.5f;
  backview.layer.maskstobounds = yes;
  [tapview addsubview:backview];
  
  //轨道前景
  uiview *trackview = [[uiview alloc] initwithframe:cgrectmake(1.5, 9, self.bounds.size.width - 3, 2)];
  trackview.backgroundcolor = [uicolor greencolor];
  trackview.layer.cornerradius = 1.f;
  trackview.layer.maskstobounds = yes;
  [tapview addsubview:trackview];
  _trackview = trackview;
  
  //滑块
  uiimageview *thumb = [[uiimageview alloc] initwithframe:cgrectmake(self.bounds.size.width - 20, 34, 20, 20)];
  [thumb setimage:[uiimage imagenamed:@"alert_teachereva_sliderimg"]];
  thumb.userinteractionenabled = yes;
  thumb.contentmode = uiviewcontentmodecenter;
  [thumb addgesturerecognizer:[[uipangesturerecognizer alloc] initwithtarget:self action:@selector(handlepan:)]];
  [self addsubview:thumb];
  _thumb = thumb;
  
  //级别标签
  uilabel *levellable = [[uilabel alloc] initwithframe:cgrectmake(0, cgrectgetmaxy(thumb.frame) + 7, self.bounds.size.width, 13)];
  levellable.text = @"非常满意";
  levellable.textcolor = [uicolor blackcolor];
  levellable.font = [uifont systemfontofsize:13.f];
  levellable.textalignment = nstextalignmentcenter;
  [self addsubview:levellable];
  _levellable = levellable;
 }
 
 return self;
}
 
- (void)setscore:(nsinteger)score
{
 _score = score;
 
 //刷新视图
 [self reloadviewwiththumbceneterx:score / 10.0 * self.bounds.size.width];
}
 
//点击滑动条
- (void)handletap:(uitapgesturerecognizer *)sender
{
 //刷新视图
 [self reloadviewwiththumbceneterx:[sender locationinview:self].x];
}
 
//滑动滑块
- (void)handlepan:(uipangesturerecognizer *)sender
{
 //获取偏移量
 cgfloat movex = [sender translationinview:self].x;
 
 //重置偏移量，避免下次获取到的是原基础的增量
 [sender settranslation:cgpointmake(0, 0) inview:self];
 
 //计算当前中心值
 cgfloat centerx = _thumb.centerx + movex;
 
 //防止瞬间大偏移量滑动影响显示效果
 if (centerx < 10) centerx = 10;
 if (centerx > self.bounds.size.width - 10) centerx = self.bounds.size.width - 10;
 
 //刷新视图
 [self reloadviewwiththumbceneterx:centerx];
}
 
- (void)reloadviewwiththumbceneterx:(cgfloat)thumbceneterx
{
 //更新轨道前景色
 _trackview.framewidth = thumbceneterx;
 
 //更新滑块位置
 _thumb.centerx = thumbceneterx;
 if (_thumb.centerx < 10) {
  _thumb.centerx = 10;
 }else if (_thumb.centerx > self.bounds.size.width - 10) {
  _thumb.centerx = self.bounds.size.width - 10;
 }
 
 //更新箭头位置
 _arrowimage.centerx = _thumb.centerx;
 
 //更新气泡标签位置（气泡图片宽度74，实际内容宽度66）
 _bubbleimage.centerx = _thumb.centerx;
 if (_bubbleimage.centerx < 33) {
  _bubbleimage.centerx = 33;
 }else if (_bubbleimage.centerx > self.bounds.size.width - 33) {
  _bubbleimage.centerx = self.bounds.size.width - 33;
 }
 
 //更新分数标签位置
 _scorelabel.centerx = _bubbleimage.centerx;
 
 //分数，四舍五入取整
 _score = round(thumbceneterx / self.bounds.size.width * 10);
 
 //更新标签内容
 _scorelabel.text = [nsstring stringwithformat:@"%ld", _score];
 if (_score <= 3) {
  _levellable.text = @"极不满意";
 }else if (_score <= 5) {
  _levellable.text = @"不满意";
 }else if (_score <= 7) {
  _levellable.text = @"一般";
 }else if (_score <= 9) {
  _levellable.text = @"满意";
 }else if (_score == 10) {
  _levellable.text = @"非常满意";
 }
}
 
@end

demo 下载链接

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