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：
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hwslider *slider = [[hwslider alloc] initwithframe:cgrectmake(10, 50, 300, 75)];[self.view addsubview:slider]; |
hwslider：
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#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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原文链接：https://blog.csdn.net/hero_wqb/article/details/78965106
