iOS实现步骤进度条功能实例代码

程序员文章站 2022-11-14 10:28:17

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 uik...

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实现步骤进度条功能实例代码

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

#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

#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：

- (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：

iOS实现步骤进度条功能实例代码