前幾天開發群里有一個老兄問了一個開發問題,他們的需求是要做一個類似音頻進度條的東西,我感覺設計還不錯,于是就寫了個小demo供大家參考,在爭得了他的同意的情況下寫下這篇文章。
話不多說先上效果圖

看到這個效果的時候我感覺相對比較難的點有兩點:
一、是這個進度條的進度顏色變化,這里思路還是比較清晰的,直接用layer的mask來做就可以。
二、第二點就是這個各各條條的高度不一致又沒有規律可言,在各個方法中我最終選擇用隨機數來做。
好了思路清晰了,那就開始擼代碼了。
首先創建一個View CYXAudioProgressView
@interface CYXAudioProgressView : UIView //無動畫設置 進度 @property (assign, nonatomic) CGFloat persentage; //有動畫設置 進度 0~1 -(void)setAnimationPersentage:(CGFloat)persentage; /** 初始化layer 在完成frame賦值后調用一下 */ -(void)initLayers; @end
成員變量及初始化方法
/*條條間隙*/
#define kDrawMargin 4
#define kDrawLineWidth 8
/*差值*/
#define differenceValue 51
@interface CYXAudioProgressView ()<CAAnimationDelegate>
/*條條 灰色路徑*/
@property (nonatomic,strong) CAShapeLayer *shapeLayer;
/*背景黃色*/
@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;
}
畫圖方法:
/**
初始化layer 在完成frame賦值后調用一下
*/
-(void)initLayers{
[self initStrokeLayer];
[self setBackColorLayer];
}
繪制路徑
/*路徑*/
-(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 之間取
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;
}
設置mask來顯示黃色路徑
/*設置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;
}
手動設置百分比的兩個方法
-(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"];
}
/**
* 在修改百分比的時候,修改遮罩的大小
*
* @param persentage 百分比
*/
- (void)setPersentage:(CGFloat)persentage {
_persentage = persentage;
self.maskLayer.strokeEnd = persentage;
}
最終使用
- (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];
}
以上就簡單的實現了上述效果,有問題歡迎指教。
Demo: https://github.com/SionChen/CYXAudioProgressView
總結
以上所述是小編給大家介紹的iOS實現音頻進度條效果,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復大家的。在此也非常感謝大家對億速云網站的支持!
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