内容简介: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
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
QQ20180509-160255-HD.gif
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。
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