1 #import "ViewController.h"  2 #import "Word.h"  3 #import "AudioPlayTool.h"  4 #import "NSString+CJZ.h"  5   6   7 @interface ViewController ()<UIPickerViewDataSource,UIPickerViewDelegate>  8   9 @property (nonatomic,strong) NSArray *wordsArray;  // 存储对象word,word是根据歌词文件生成的一个对象,用来在PickerView显示一行的信息; 10 @property (nonatomic,assign) int index;            // 播放索引; 11 @property (nonatomic,strong) CADisplayLink *playLink;   // 定时器; 12 @property (nonatomic,strong) AudioPlayTool * playTool;    // 播放类工具,用来播放歌曲, 13  14 @property (weak, nonatomic) IBOutlet UIPickerView *wordListPicker;     // 显示歌词的PickerView 15  16  17 @end 18  19 @implementation ViewController 20 - (IBAction)nextClick { 21     [self.wordListPicker selectRow:self.index inComponent:0 animated:YES]; 22 } 23  24  25 - (AudioPlayTool *)playTool 26 { 27     if (_playTool == nil) { 28         _playTool = [[AudioPlayTool alloc]init]; 29     } 30     return _playTool; 31 } 32  33 - (CADisplayLink *)playLink 34 { 35     if (_playLink == nil) { 36         _playLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(updateInfo:)]; 37     } 38     return _playLink; 39 } 40  41 - (NSArray *)wordsArray 42 { 43     if (_wordsArray == nil) { 44         _wordsArray = [NSArray array]; 45     } 46     return _wordsArray; 47 } 48  49 - (void)viewDidLoad 50 { 51     [super viewDidLoad]; 52     NSString *path = [[NSBundle mainBundle]pathForResource:@"Set Fire To The Rain_歌词.lrc" ofType:nil]; 53     self.wordsArray = [[Word alloc] wordsWithFilePath:path]; 54     [self.playTool prepareAudioWithName:@"31071114.mp3"]; 55     [self.playTool play]; 56     [self.playLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode]; 57    58 } 59  60 #pragma mark - UIPickerView DataSource and Delegate; 61  62 - (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component 63 { 64     return 40; 65 } 66  67 - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 68 { 69     return 1; 70 } 71 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component 72 { 73     return  self.wordsArray.count; 74      75 } 76  77  78 - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view 79 { 80     UILabel *textLable = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 320, 40)]; 81     Word *textWord = self.wordsArray[row]; 82     textLable.text = textWord.text; 83     textLable.font = [UIFont systemFontOfSize:13]; 84     textLable.numberOfLines = 0; 85     return textLable; 86 } 87  - (void)updateInfo:(CADisplayLink *)display 88 { 89     AVAudioPlayer *player = self.playTool.audioPlay; 90     double currentTime = player.currentTime; 91     NSString *change2Time = [NSString getMinuteSecondWithSecond:currentTime]; 92     double compareTime = [NSString getTimeWithString:change2Time]; 93      94    for (int i = 0; i < self.wordsArray.count; i++) 95     { 96         Word *beginW = self.wordsArray[i]; 97         double wordTime = [NSString getTimeWithString:beginW.time]; 98         Word *nextW = nil; 99         int next = i + 1;100         if (next < self.wordsArray.count) {101             nextW = self.wordsArray[next];102             if (compareTime >= wordTime && compareTime <= [NSString getTimeWithString:nextW.time])103             {104                dispatch_async(dispatch_get_main_queue(), ^{105                 self.index = i + 1;106                 [self nextClick];107              });108               break;109             }110         }111     }112 }113 114 115 116 @end

 1 #import <Foundation/Foundation.h> 2  3 @interface Word : NSObject 4 @property (nonatomic,copy)NSString *time; 5 @property (nonatomic,copy)NSString *text; 6  7 + (instancetype)wordWithString:(NSString *)string;    //工具方法,根据特定的字符串,生成word对象; 8 - (instancetype)initWithString:(NSString *)string;    // 同上; 9 10 - (NSArray *)wordsWithFilePath:(NSString *)path;      // 根据文件路径,生成包含多个word对象的数组;11 12 @end

 1 #import "Word.h" 2  3 @implementation Word 4  5 - (instancetype)initWithString:(NSString *)string 6 { 7     if (self = [super init]) { 8         NSRange  rangeOne = NSMakeRange(1, 5); 9         self.time = [string substringWithRange:rangeOne];10         self.text = [string substringFromIndex:10];11     }12     return self;13 }14 15 + (instancetype)wordWithString:(NSString *)string16 {17     return [[self alloc]initWithString:string];18 }19 20 - (NSArray *)wordsWithFilePath:(NSString *)path21 {22     NSError *error = nil;23     NSString *original = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&error];24     NSArray *stringArray = [original componentsSeparatedByString:@"\n"];25     NSMutableArray *lastArray = [NSMutableArray array];26     for (NSString *string in stringArray) {27         if ((string.length > @"[00:00:00]".length ) && [string hasPrefix:@"[0"]) {28             [lastArray addObject:string];29         }30     }31     NSMutableArray *wordsArray = [NSMutableArray array];32     for (NSString *string in lastArray) {33         Word *singleWord = [Word wordWithString:string];34         [wordsArray addObject:singleWord];35     }36     return [wordsArray copy];37 }38 @end

 1 #import <Foundation/Foundation.h> 2 #import <AVFoundation/AVFoundation.h> 3  4 @class AVAudioPlayer ; 5 @interface AudioPlayTool : NSObject 6  7 @property (nonatomic,strong,readonly ) AVAudioPlayer *audioPlay; 8  9 - (void)prepareAudioWithName:(NSString *)name;10 - (void)play;11 - (void)stop;12 - (void)pause;13 14 @end

 1 #import "AudioPlayTool.h" 2  3  4 @interface AudioPlayTool() 5  6  7 @end 8  9 @implementation AudioPlayTool10 11 12 - (void)prepareAudioWithName:(NSString *)name13 {14    NSError *error = nil;15     NSString *songPath = [[NSBundle mainBundle] pathForResource:name ofType:nil];16      AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:songPath] error:&error];17     if (error) {18               return;19     }20     [player prepareToPlay];21     _audioPlay = player;22 }23 24 - (void)play25 {26     if (![_audioPlay isPlaying]) {27         [self.audioPlay play];28     29     }30 }31 32 - (void)stop33 {34     [self.audioPlay stop];35 }36 37 - (void)pause38 {39     if ([_audioPlay isPlaying]) {40         [self.audioPlay pause];41     42     }43 }44 45 @end

#import <Foundation/Foundation.h>@interface NSString (CJZ)/** *  返回分与秒的字符串 如:01:60 */+(NSString *)getMinuteSecondWithSecond:(NSTimeInterval)time;+(NSTimeInterval) getTimeWithString:(NSString *)string;@end

#import "NSString+CJZ.h"@implementation NSString (CJZ)+(NSString *)getMinuteSecondWithSecond:(NSTimeInterval)time{        int minute = (int)time / 60;    int second = (int)time % 60;        if (second > 9) {        return [NSString stringWithFormat:@"%d:%d",minute,second];    }    return [NSString stringWithFormat:@"%d:0%d",minute,second];}+ (NSTimeInterval)getTimeWithString:(NSString *)string{    if (string.length == 5) {        double first = [[string substringWithRange:NSMakeRange(1, 1)] doubleValue];        double second = [[string substringFromIndex:3] doubleValue];        return first + second * 0.01;    }    double first = [[string substringWithRange:NSMakeRange(0, 1)] doubleValue];    double second = [[string substringFromIndex:2] doubleValue];    return first + second * 0.01;}@end