iOS 自定义步骤进度条

新项目要做入驻功能,其中包括一个入住流程,类似登录或者注册流程如下图。

之前想着用自己绘图来做,可是又懒不想多写代码，所以就想着能不能用进度条来做。

1.用进度条做的首先要解决的是进度条的高度问题,可以通过仿射变换来扩大高度。

progressView.transform = CGAffineTransformMakeScale(1.0f,2.0f);

2.用进度条要设置进度progress要与按钮对应

通过步骤的索引来改变进度的值和按钮的图片。由于按钮的左右有间隔所以要注意-1、0和最后一个的progress值。

3.扩展

看有一些类似查公交、车站运行的APP有的可以点击站点，所以就用按钮来做，这样可以扩展。

 4.代码

//
//  StepProgressView.h
//  CustomProgress
//
//  Created by City--Online on 15/12/12.
//  Copyright  2015年 City--Online. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface StepProgressView : UIView

@property (nonatomic,assign) NSInteger stepIndex;

+(instancetype)progressViewFrame:(CGRect)frame withTitleArray:(NSArray *)titleArray;

@end

//
//  StepProgressView.m
//  CustomProgress
//
//  Created by City--Online on 15/12/12.
//  Copyright  2015年 City--Online. All rights reserved.
//

#import "StepProgressView.h"

static const float imgBtnWidth=18;

@interface StepProgressView ()

@property (nonatomic,strong) UIProgressView *progressView;

//用UIButton防止以后有点击事件
@property (nonatomic,strong) NSMutableArray *imgBtnArray;

@end

@implementation StepProgressView

+(instancetype)progressViewFrame:(CGRect)frame withTitleArray:(NSArray *)titleArray
{
    StepProgressView *stepProgressView=[[StepProgressView alloc]initWithFrame:frame];
    //进度条
    stepProgressView.progressView=[[UIProgressView alloc]initWithFrame:CGRectMake(0, 5, frame.size.width, 10)];
    stepProgressView.progressView.progressViewStyle=UIProgressViewStyleBar;
    stepProgressView.progressView.transform = CGAffineTransformMakeScale(1.0f,2.0f);
    stepProgressView.progressView.progressTintColor=[UIColor redColor];
    stepProgressView.progressView.trackTintColor=[UIColor blueColor];
    stepProgressView.progressView.progress=0.5;
    [stepProgressView addSubview:stepProgressView.progressView];

    stepProgressView.imgBtnArray=[[NSMutableArray alloc]init];
    float _btnWidth=frame.size.width/(titleArray.count);
    for (int i=0; i<titleArray.count; i++) {
         //图片按钮
        UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
        [btn setImage:[UIImage imageNamed:@"0.png"] forState:UIControlStateNormal];
        [btn setImage:[UIImage imageNamed:@"1.png"] forState:UIControlStateSelected];
        btn.frame=CGRectMake(_btnWidth/2+_btnWidth*i-imgBtnWidth/2, 0, imgBtnWidth, imgBtnWidth);
        btn.selected=YES;

        [stepProgressView addSubview:btn];
        [stepProgressView.imgBtnArray addObject:btn];

        //文字
        UILabel *titleLabel=[[UILabel alloc]initWithFrame:CGRectMake(btn.center.x-_btnWidth/2, frame.size.height-20, _btnWidth, 20)];
        titleLabel.text=[titleArray objectAtIndex:i];
        [titleLabel setTextColor:[UIColor blackColor]];
        titleLabel.textAlignment=NSTextAlignmentCenter;
        titleLabel.font=[UIFont systemFontOfSize:18];
        [stepProgressView addSubview:titleLabel];
    }
    stepProgressView.stepIndex=-1;
    return stepProgressView;

}
-(void)setStepIndex:(NSInteger)stepIndex
{
//  默认为－1 小于－1为－1 大于总数为总数
    _stepIndex=stepIndex<-1?-1:stepIndex;
    _stepIndex=stepIndex >=_imgBtnArray.count-1?_imgBtnArray.count-1:stepIndex;
    float _btnWidth=self.bounds.size.width/(_imgBtnArray.count);
    for (int i=0; i<_imgBtnArray.count; i++) {
        UIButton *btn=[_imgBtnArray objectAtIndex:i];
        if (i<=_stepIndex) {
           btn.selected=YES;
        }
        else{
            btn.selected=NO;
        }
    }
    if (_stepIndex==-1) {
        self.progressView.progress=0.0;
    }
    else if (_stepIndex==_imgBtnArray.count-1)
    {
        self.progressView.progress=1.0;
    }
    else
    {
        self.progressView.progress=(0.5+_stepIndex)*_btnWidth/self.frame.size.width;
    }
}

@end

5.使用和效果

NSArray *arr=@[@"区宝时尚",@"区宝时尚",@"时尚",@"区宝时尚",@"时尚"];
    StepProgressView *stepView=[StepProgressView progressViewFrame:CGRectMake(0, 100, self.view.bounds.size.width, 60) withTitleArray:arr];
    stepView.stepIndex=2;
    [self.view addSubview:stepView];

 补充:上面的代码有一个bug,例如stepIndex=－1时，_stepIndex=并不等－1，原来数组的count返回的是NSUInteger而stepIndex是NSInteger类型，所以需要强制转换一下

stepIndex=stepIndex<-1?-1:stepIndex;
    _stepIndex = stepIndex >= (NSInteger)(_imgBtnArray.count-1) ? _imgBtnArray.count-1:stepIndex;