#pragma mark == GLMusicPlayerDelegate
- (void)updateProgressWithCurrentPosition:(FSStreamPosition)currentPosition endPosition:(FSStreamPosition)endPosition
{
//更新进度条
self.playerControlView.slider.value = currentPosition.position;
self.playerControlView.leftTimeLable.text = [NSString translationWithMinutes:currentPosition.minute seconds:currentPosition.second];
self.playerControlView.rightTimeLable.text = [NSString translationWithMinutes:endPosition.minute seconds:endPosition.second];
//更新歌词
[self updateMusicLrcForRowWithCurrentTime:currentPosition.position *(endPosition.minute *60 + endPosition.second)];
self.playerControlView.palyMusicButton.selected = [GLMusicPlayer defaultPlayer].isPause;
}
本项目中，slider控件没有用系统的，而是简单的写了一个，大概如下
@interface GLSlider : UIControl
//进度条颜色
@property (nonatomic,strong) UIColor *progressColor;
//缓存条颜色
@property (nonatomic,strong) UIColor *progressCacheColor;
//滑块颜色
@property (nonatomic,strong) UIColor *thumbColor;
//设置进度值 0-1
@property (nonatomic,assign) CGFloat value;
//设置缓存进度值 0-1
@property (nonatomic,assign) CGFloat cacheValue;
@end
static CGFloat const kProgressHeight = 2;
static CGFloat const kProgressLeftPadding = 2;
static CGFloat const kThumbHeight = 16;
@interface GLSlider()
//滑块 默认
@property (nonatomic,strong) CALayer *thumbLayer;
//进度条
@property (nonatomic,strong) CALayer *progressLayer;
//缓存进度条
@property (nonatomic,strong) CALayer *progressCacheLayer;
@property (nonatomic,assign) BOOL isTouch;
@end
@implementation GLSlider
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self addSubLayers];
}
return self;
}
....
这里是添加了缓存进度条的，但是由于时间关系，代码中还未实时更新缓存进度
3、更新歌词界面
说到歌词界面，我们看到QQ音乐的效果是这样的，逐行逐字进行更新，注意不是逐行更新。考虑到逐字进行更新，那么我们必须要对lable进行干点什么，这里对其进行了继承，并添加了些方法
@interface GLMusicLrcLable : UILabel
//进度
@property (nonatomic,assign) CGFloat progress;
@end
#import "GLMusicLrcLable.h"
@implementation GLMusicLrcLable
- (void)setProgress:(CGFloat)progress
{
_progress = progress;
//重绘
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect
{
[super drawRect:rect];
CGRect fillRect = CGRectMake(0, 0, self.bounds.size.width * _progress, self.bounds.size.height);
[UICOLOR_FROM_RGB(45, 185, 105) set];
UIRectFillUsingBlendMode(fillRect, kCGBlendModeSourceIn);
}
@end
注意UIRectFillUsingBlendMode该方法能够实现逐字进行渐变的效果
逐字的问题解决了，那么就剩下逐行问题了，逐行的问题应该不难，是的。我们只需要在指定的时间内将其滚动就行，如下
