iOS实现音频进度条效果

前几天开发群里有一个老兄问了一个开发问题，他们的需求是要做一个类似音频进度条的东西，我感觉设计还不错，于是就写了个小demo供大家参考，在争得了他的同意的情况下写下这篇文章。

话不多说先上效果图

看到这个效果的时候我感觉相对比较难的点有两点：

一、是这个进度条的进度颜色变化，这里思路还是比较清晰的，直接用layer的mask来做就可以。

二、第二点就是这个各各条条的高度不一致又没有规律可言，在各个方法中我最终选择用随机数来做。

  好了思路清晰了，那就开始撸代码了。

首先创建一个view cyxaudioprogressview

@interface cyxaudioprogressview : uiview
//无动画设置 进度
@property (assign, nonatomic) cgfloat persentage;
//有动画设置 进度 0~1
-(void)setanimationpersentage:(cgfloat)persentage;
/**
 初始化layer 在完成frame赋值后调用一下
 */
-(void)initlayers;
@end

成员变量及初始化方法

/*条条间隙*/
#define kdrawmargin 4
#define kdrawlinewidth 8
/*差值*/
#define differencevalue 51
@interface cyxaudioprogressview ()<caanimationdelegate>

/*条条 灰色路径*/
@property (nonatomic,strong) cashapelayer *shapelayer;
/*背景黄色*/
@property (nonatomic,strong) cashapelayer *backcolorlayer;
@property (nonatomic,strong) cashapelayer *masklayer;
@end
@implementation cyxaudioprogressview

-(instancetype)initwithframe:(cgrect)frame{
 if (self = [super initwithframe:frame]) {
 self.backgroundcolor = [uicolor blackcolor];
 [self.layer addsublayer:self.shapelayer];
 [self.layer addsublayer:self.backcolorlayer];
 self.persentage = 0.0;
 }
 return self;
}

画图方法：

/**
 初始化layer 在完成frame赋值后调用一下
 */
-(void)initlayers{
 [self initstrokelayer];
 [self setbackcolorlayer];
}

绘制路径

/*路径*/
-(void)initstrokelayer{
 uibezierpath *path = [uibezierpath bezierpath];
 cgfloat maxwidth = self.frame.size.width;
 cgfloat drawheight = self.frame.size.height;
 cgfloat x = 0.0;
 while (x+kdrawlinewidth<=maxwidth) {
 cgfloat random =5+ arc4random()%differencevalue;//差值在1-50 之间取
 nslog(@"%f",random);
 [path movetopoint:cgpointmake(x-kdrawlinewidth/2, random)];
 [path addlinetopoint:cgpointmake(x-kdrawlinewidth/2, drawheight-random)];
 x+=kdrawlinewidth;
 x+=kdrawmargin;
 }
 self.shapelayer.path = path.cgpath;
 self.backcolorlayer.path = path.cgpath;
}

设置mask来显示黄色路径

/*设置masklayer*/
-(void)setbackcolorlayer{
 uibezierpath *path = [uibezierpath bezierpath];
 [path movetopoint:cgpointmake(0, self.frame.size.height/2)];
 [path addlinetopoint:cgpointmake(self.frame.size.width, self.frame.size.height/2)];
 self.masklayer.frame = self.bounds;
 self.masklayer.linewidth = self.frame.size.width;
 self.masklayer.path= path.cgpath;
 self.backcolorlayer.mask = self.masklayer;
}

手动设置百分比的两个方法

-(void)setanimationpersentage:(cgfloat)persentage{
 cgfloat startpersentage = self.persentage;
 [self setpersentage:persentage];

 cabasicanimation *pathanimation = [cabasicanimation animationwithkeypath:@"strokeend"];
 pathanimation.duration = 1;
 pathanimation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseineaseout];
 pathanimation.fromvalue = [nsnumber numberwithfloat:startpersentage];
 pathanimation.tovalue = [nsnumber numberwithfloat:persentage];
 pathanimation.autoreverses = no;
 pathanimation.delegate = self;
 [self.masklayer addanimation:pathanimation forkey:@"strokeendanimation"];
}
/**
 * 在修改百分比的时候，修改遮罩的大小
 *
 * @param persentage 百分比
 */
- (void)setpersentage:(cgfloat)persentage {

 _persentage = persentage;
 self.masklayer.strokeend = persentage;
}

最终使用

- (void)viewdidload {
 [super viewdidload];
 // do any additional setup after loading the view, typically from a nib.
 self.view.backgroundcolor = [uicolor whitecolor];

 self.loopprogressview.frame =cgrectmake(0, 100, self.view.frame.size.width, 150);
 [self.loopprogressview initlayers];
 [self.view addsubview:self.loopprogressview];
 dispatch_after(dispatch_time(dispatch_time_now, (int64_t)(1 * nsec_per_sec)), dispatch_get_main_queue(), ^{
 [self.loopprogressview setanimationpersentage:0.5];
 });

 self.slider.frame = cgrectmake(30, self.view.frame.size.height-60, self.view.frame.size.width-30*2, 20);
 [self.view addsubview:self.slider];
}

以上就简单的实现了上述效果，有问题欢迎指教。

demo: https://github.com/sionchen/cyxaudioprogressview

总结

以上所述是小编给大家介绍的ios实现音频进度条效果，希望对大家有所帮助