前言
在开发中,我们经常在很多场景下需要用到进度条,比如文件的下载,或者文件的上传等。 本文主要给大家介绍的是一个步骤进度条效果，步骤进度条效果参考
ios uikit 框架中并没有提供类似的控件，我们可以使用 uiprogressview、uiview、uilabel 组合实现步骤进度条效果。
- uiprogressview——实现水平的进度条效果；
- uiview——把uiview裁剪成圆形，实现索引节点效果；
- uilabel——每个节点下面的提示文字。
源码
将步骤进度条封装成一个 hqlstepview 类，它是 uiview 的子类。
hqlstepview.h 文件
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#import <uikit/uikit.h>@interface hqlstepview : uiview// 指定初始化方法- (instancetype)initwithframe:(cgrect)frame titlesarray:(nsarray *)titlesarray stepindex:(nsuinteger)stepindex;// 设置当前步骤- (void)setstepindex:(nsuinteger)stepindex animation:(bool)animation;@end |
hqlstepview.m 文件
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#import "hqlstepview.h"// 步骤条主题色#define tint_color [uicolor colorwithred:35/255.f green:135/255.f blue:255/255.f alpha:1]@interface hqlstepview ()@property (nonatomic, copy) nsarray *titlesarray;@property (nonatomic, assign) nsuinteger stepindex;@property (nonatomic, strong) uiprogressview *progressview;@property (nonatomic, strong) nsmutablearray *circleviewarray;@property (nonatomic, strong) nsmutablearray *titlelabelarray;@property (nonatomic, strong) uilabel *indicatorlabel;@end@implementation hqlstepview#pragma mark - init- (instancetype)initwithframe:(cgrect)frame titlesarray:(nsarray *)titlesarray stepindex:(nsuinteger)stepindex { self = [super initwithframe:frame]; if (self) { _titlesarray = [titlesarray copy]; _stepindex = stepindex; // 进度条 [self addsubview:self.progressview]; for (nsstring *title in _titlesarray) { // 圆圈 uiview *circle = [[uiview alloc] initwithframe:cgrectmake(0, 0, 13, 13)]; circle.backgroundcolor = [uicolor lightgraycolor]; circle.layer.cornerradius = 13.0f / 2; [self addsubview:circle]; [self.circleviewarray addobject:circle]; // 标题 uilabel *label = [[uilabel alloc] init]; label.text = title; label.font = [uifont systemfontofsize:14]; label.textalignment = nstextalignmentcenter; [self addsubview:label]; [self.titlelabelarray addobject:label]; } // 当前索引数字 [self addsubview:self.indicatorlabel]; } return self;}// 布局更新页面元素- (void)layoutsubviews { nsinteger perwidth = self.frame.size.width / self.titlesarray.count; // 进度条 self.progressview.frame = cgrectmake(0, 0, self.frame.size.width - perwidth, 1); self.progressview.center = cgpointmake(self.frame.size.width / 2, self.frame.size.height / 4); cgfloat startx = self.progressview.frame.origin.x; for (int i = 0; i < self.titlesarray.count; i++) { // 圆圈 uiview *cycle = self.circleviewarray[i]; if (cycle) { cycle.center = cgpointmake(i * perwidth + startx, self.progressview.center.y); } // 标题 uilabel *label = self.titlelabelarray[i]; if (label) { label.frame = cgrectmake(perwidth * i, self.frame.size.height / 2, self.frame.size.width / self.titlesarray.count, self.frame.size.height / 2 ); } } self.stepindex = self.stepindex;}#pragma mark - custom accessors- (uiprogressview *)progressview { if (!_progressview) { _progressview = [[uiprogressview alloc] initwithprogressviewstyle:uiprogressviewstyledefault]; _progressview.progresstintcolor = tint_color; _progressview.progress = self.stepindex / ((self.titlesarray.count - 1) * 1.0); } return _progressview;}- (uilabel *)indicatorlabel { if (!_indicatorlabel) { _indicatorlabel = [[uilabel alloc] initwithframe:cgrectmake(0, 0, 23, 23)]; _indicatorlabel.textcolor = tint_color; _indicatorlabel.textalignment = nstextalignmentcenter; _indicatorlabel.backgroundcolor = [uicolor whitecolor]; _indicatorlabel.layer.cornerradius = 23.0f / 2; _indicatorlabel.layer.bordercolor = [tint_color cgcolor]; _indicatorlabel.layer.borderwidth = 1; _indicatorlabel.layer.maskstobounds = yes; } return _indicatorlabel;}- (nsmutablearray *)circleviewarray { if (!_circleviewarray) { _circleviewarray = [[nsmutablearray alloc] initwithcapacity:self.titlesarray.count]; } return _circleviewarray;}- (nsmutablearray *)titlelabelarray { if (!_titlelabelarray) { _titlelabelarray = [[nsmutablearray alloc] initwithcapacity:self.titlesarray.count]; } return _titlelabelarray;}// 设置当前进度索引，更新圆形图片、文本颜色、当前索引数字- (void)setstepindex:(nsuinteger)stepindex { for (int i = 0; i < self.titlesarray.count; i++) { uiview *cycle = self.circleviewarray[i]; uilabel *label = self.titlelabelarray[i]; if (stepindex >= i) { cycle.backgroundcolor = tint_color; label.textcolor = tint_color; } else { cycle.backgroundcolor = [uicolor lightgraycolor]; label.textcolor = [uicolor lightgraycolor]; } }}#pragma mark - public- (void)setstepindex:(nsuinteger)stepindex animation:(bool)animation { if (stepindex < self.titlesarray.count) { // 更新颜色 self.stepindex = stepindex; // 设置进度条 [self.progressview setprogress:stepindex / ((self.titlesarray.count - 1) * 1.0) animated:animation]; // 设置当前索引数字 self.indicatorlabel.text = [nsstring stringwithformat:@"%lu", stepindex + 1]; self.indicatorlabel.center = ((uiview *)[self.circleviewarray objectatindex:stepindex]).center; }}@end |
接口调用：
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- (void)viewdidload { [super viewdidload]; // 初始化 _hqlstepview = [[hqlstepview alloc] initwithframe:cgrectmake(0, 200, self.view.frame.size.width, 60) titlesarray:@[@"第一步", @"第二步", @"第三步"] stepindex:0]; [self.view addsubview:_hqlstepview];}- (void)viewdidappear:(bool)animated { [super viewdidappear:animated]; // 设置当前步骤，步骤索引=数组索引 [_hqlstepview setstepindex:0 animation:yes];} |
效果：
因为 uiprogressview 实现的水平进度条高度值默认为1，设置frame是无效的。可以通过仿射变换的方式增加它的高度。
第三方框架
- github: istimeline ⭐️900
- github: timelinetableviewcell ⭐️800
参考：
总结：
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对服务器之家的支持。
原文链接：https://www.jianshu.com/p/fb471ca68a1b
