先说下思路：歌词是tableView的实现，用个定时器每隔0.5秒就自动滚动一次，比较当前的时间和播放器的时间的大小来判断是否滚动到下一行。废话不多说，直接上代码。
一. 播放界面VC.h
#import<UIKit/UIKit.h>
@interfaceThirdViewController :UIViewController
@end
二：播放界面的VC.m
#import "ThirdViewController.h"
#import "LrcParser.h"
#import <AVFoundation/AVFoundation.h>
@interface ThirdViewController ()<UITableViewDataSource, UITableViewDelegate>
@property (nonatomic, strong) AVAudioPlayer *player;
@property (strong, nonatomic) IBOutlet UITableView *lyrTableView;
@property (nonatomic, strong) LrcParser *lrcContent; //model，存储的是歌词的时间和歌词
@property (nonatomic, assign) NSInteger currentRow;
@end
@implementation ThirdViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.navigationController.edgesForExtendedLayout = UIRectEdgeNone;
self.lrcContent = [[LrcParser alloc] init ];
[self.lrcContent parseLrc];
[self initPlayer];
// UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"wall1.jpg"]];
// imageView = [self getBlurEffectImageView:imageView];
// self.lyrTableView.backgroundView = imageView;
UIImage *img = [UIImage imageNamed:@"wall1.jpg"];
UIImageView *bgView = [[UIImageView alloc] initWithImage:img];
self.lyrTableView.backgroundView = bgView;
[bgView setImage:[self getBlurredImage:img]];
[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(updateTime) userInfo:nil repeats:YES];
}
- (void)initPlayer{
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setActive:YES error:nil];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:[[NSBundle mainBundle] URLForResource:@"冰雨" withExtension:@"mp3"] error:nil];
self.player.numberOfLoops = 10;
[self.player prepareToPlay];
[self.player play];
}
#pragma mark - UITableViewDataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return self.lrcContent.wordArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [self.lyrTableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
cell.textLabel.text = self.lrcContent.wordArray[indexPath.row];
if (indexPath.row == _currentRow) {
cell.textLabel.textColor = [UIColor greenColor];
}else{
cell.textLabel.textColor = [UIColor lightGrayColor];
}
return cell;
}
#pragma mark - UITableViewDelegate
- (void)updateTime{
CGFloat currentTime = self.player.currentTime;
NSLog(@"%d:%d", (int)currentTime / 60, (int)currentTime % 60);
for (int i = 0; i < self.lrcContent.timerArray.count; i ++) {
NSArray *timeArray = [self.lrcContent.timerArray[i] componentsSeparatedByString:@":"];
float lrcTime = [timeArray[0] intValue] * 60 + [timeArray[1] intValue];
if (currentTime > lrcTime) {
_currentRow = i;
}else{
break;
}
[self.lyrTableView reloadData];
[self.lyrTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:_currentRow inSection:0] atScrollPosition:UITableViewScrollPositionMiddle animated:YES];
}
}
/**
* 实现图片blurEffect的模糊效果(模糊效果明显)
*/
//- (UIImageView *)getBlurEffectImageView:(UIImageView *)imageView{
// UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
// UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
// effectView.frame = imageView.frame;
// [imageView addSubview:effectView];
// return imageView;
//}
/**
* 实现图片高斯模糊
*/
- (UIImage *)getBlurredImage:(UIImage *)image{
CIContext *content = [CIContext contextWithOptions:nil];
CIImage *ciImage = [CIImage imageWithCGImage:image.CGImage];
CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];
[filter setValue:ciImage forKey:kCIInputImageKey];
[filter setValue:@5.0f forKey:@"inputRadius"];
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef ref = [content createCGImage:result fromRect:[result extent]];
return [UIImage imageWithCGImage:ref];
}
三。LrcParser类是model，主要是存储的是歌词和时间
//
// LrcParser.h
// DFRDemo
//
#import <Foundation/Foundation.h>
@interface LrcParser : NSObject
/**
* 时间
*/
@property (nonatomic, strong) NSMutableArray *timerArray;
/**
* 歌词
*/
@property (nonatomic, strong) NSMutableArray *wordArray;
/**
* 解析歌词
*/
- (void)parseLrc;
/**
* 解析歌词
*
* @param lrc
*/
- (void)parseLrc:(NSString *)lrc;
@end
//
// LrcParser.m
// DFRDemo
//
#import "LrcParser.h"
@implementation LrcParser
-(instancetype)init{
if (self = [super init]) {
self.timerArray = [[NSMutableArray alloc] initWithCapacity:0];
self.wordArray = [[NSMutableArray alloc] initWithCapacity:0];
}
return self;
}
- (NSString *)getLrcFile:(NSString *)lrc{
NSString *filePath = [[NSBundle mainBundle] pathForResource:lrc ofType:@"lrc"];
return [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
}
/**
* 解析歌词
*/
- (void)parseLrc{
[self parseLrc:[self getLrcFile:@"冰雨"]];
}
/**
* 解析歌词
*
* @param lrc
*/
- (void)parseLrc:(NSString *)lrc{
// NSLog(@"%@", lrc);
if (![lrc isEqual:nil]) {
NSArray *tempArray = [lrc componentsSeparatedByString:@"["];
NSArray *lineArray = [[NSArray alloc] init];
for (int i = 0; i < tempArray.count; i ++) {
if ([tempArray[i] length] > 0) {
lineArray = [tempArray[i] componentsSeparatedByString:@"]"];
if (![lineArray[0] isEqualToString:@"\n"]) {
[self.timerArray addObject:lineArray[0]];
[self.wordArray addObject:lineArray.count > 1 ? lineArray[1] : @""];
//NSLog(@"self.timerArray----%@", lineArray[0]);
//NSLog(@"self.wordArray----%@",lineArray.count > 1 ? lineArray[1] : @"");
}
}
}
}
}
解析出来的数据是这个样子的：
