歌词解析
#import <Foundation/Foundation.h>
@interface JYLrcItem : NSObject
@property (nonatomic) float time;
@property (nonatomic) NSString *lrc;
- (BOOL)isBiggerTimeThan:(JYLrcItem *)aItem;
@end
---------------------------------------------------------------------------
#import "JYLrcItem.h"
@implementation JYLrcItem
- (BOOL)isBiggerTimeThan:(JYLrcItem *)aItem
{
return _time > aItem.time;
}
- (NSString *)description
{
return [NSString stringWithFormat:@"%.2f %@", _time,_lrc];
}
@end
---------------------------------------------------------------------------
#import <Foundation/Foundation.h>
@interface JYLrcParser : NSObject
// 歌词作者 [ar:歌词作者]
@property NSString *author;
// 歌词所在的唱片集 [al:这首歌所在的唱片集]
@property NSString *albume;
// 本lrc编辑作者 [by:本LRC文件的创建者]
@property NSString *byEditor;
// 歌曲标题 [ti:歌词(歌曲)的标题]
@property NSString *title;
// 歌曲版本 [ve:程序的版本]
@property NSString *version;
//把解析的歌词模型 对象地址放入数组中
//存放的是JYLrcItem类的对象地址
@property NSMutableArray *allLrcItems;
// 初始化这个lrc
- (id) initWithFile:(NSString *)file;
// 通过second取得当前的歌词
- (NSString *) getLrcByTime:(float)second;
//显示歌曲信息
- (void)showSongInfo;
- (void)showAllInfo;
@end
-----------------------------------------------------------------------------------
#import "JYLrcParser.h"
#import "JYLrcItem.h"
@implementation JYLrcParser
- (id)initWithFile:(NSString *)file
{
if (self = [super init]) {
_allLrcItems = [[NSMutableArray alloc] init];
//调用方法解析歌词文件
[self parseLrcWithFile:file];
}
return self;
}
- (void)parseLrcWithFile:(NSString *)file
{
//1、读取歌词文件
NSString *lrc = [NSString stringWithContentsOfFile:file encoding:NSUTF8StringEncoding error:nil];
//2、按照'\n'进行切割
NSArray *ary = [lrc componentsSeparatedByString:@"\n"];
/*
[ti:蓝莲花]
[ar:许巍]
[al:时光-漫步]
[by:fanver]
[offset:500]
[00:00.20]蓝莲花
[00:20.81]
*/
//3、遍历数组，解析每行信息
for (NSString *str in ary) {
//过滤空行(哪个二哥随意敲回车)
if ([str isEqualToString:@""]) {
continue;
}
//获取第一个字符
unichar ch = [str characterAtIndex:1];
//判读该行是否为歌词信息
if (ch>='0' && ch<='9') {
//4-1、是歌词信息
[self parseLrcWithTimeString:str];
} else {
//4-2、是歌曲信息
[self parseLrcWithSongInformation:str];
}
}
//5、将歌词按照时间进行排序
[_allLrcItems sortUsingSelector:@selector(isBiggerTimeThan:)];
}
//4-1、歌词信息解析
- (void)parseLrcWithTimeString:(NSString *)timeString
{
/*
[02:11.27][01:50.22][00:21.95]穿过幽暗地岁月
*/
//按照']'进行切割
NSArray *ary = [timeString componentsSeparatedByString:@"]"];
//[00:20.81、@""
//过滤没有歌词的时间行
if ([ary.lastObject isEqualToString:@""]) {
return;
}
/*
[02:11.27
[01:50.22
[00:21.95
穿过幽暗地岁月
*/
for (int i=0; i<ary.count-1; i++) {
//[02:11.27
int min = [[ary[i] substringWithRange:NSMakeRange(1, 2)] intValue];
float sec = [[ary[i] substringFromIndex:4] floatValue];
float time = min*60 + sec;
//创建歌词对象，保存信息
JYLrcItem *item = [[JYLrcItem alloc] init];
item.time = time;
item.lrc = [ary lastObject];
//将歌词对象添加到_allLrcItems
[_allLrcItems addObject:item];
}
}
//4-2、歌曲信息解析
- (void)parseLrcWithSongInformation:(NSString *)info
{
/*
[ti:蓝莲花]
[ar:许巍]
[al:时光-漫步]
[by:fanver]
*/
NSString *item = [info substringWithRange:NSMakeRange(1, 2)];
NSString *content = [info substringWithRange:NSMakeRange(4, info.length-5)];
if ([item isEqualToString:@"ti"]) {
_title = content;
} else if ([item isEqualToString:@"al"]) {
_albume = content;
} else if ([item isEqualToString:@"ar"]) {
_author = content;
} else if ([item isEqualToString:@"by"]) {
_byEditor = content;
}
}
- (void)showAllInfo
{
for (JYLrcItem *item in _allLrcItems) {
printf("%s\n", [[item description] UTF8String]);
}
}
- (NSString *)getLrcByTime:(float)second
{
/*
1
3\5\8\9\11\15...\100
*/
#if 0
for (int i=0; i<_allLrcItems.count; i++) {
if ([_allLrcItems[i] time] > second) {
return [_allLrcItems[i-(i!=0)] lrc];
}
}
return [[_allLrcItems lastObject] lrc];
#else
int index = (int)_allLrcItems.count - 1;
for (int i=0; i<_allLrcItems.count; i++) {
if ([_allLrcItems[i] time] > second) {
index = i - (i!=0);
break;
}
}
return [_allLrcItems[index] lrc];
#endif
}
- (void)showSongInfo
{
if (_title) {
printf("ti:%s\n", [_title UTF8String]);
}
if (_author) {
printf("ar:%s\n", [_author UTF8String]);
}
if (_albume) {
printf("al:%s\n", [_albume UTF8String]);
}
if (_byEditor) {
printf("by:%s\n", [_byEditor UTF8String]);
}
}
@end
--------------------------------------------------------------------------------------------
#import <Foundation/Foundation.h>
#import "JYLrcParser.h"
#define PATH @"/Users/qianfeng001/Desktop/wenzhe/RAIN/十五天/day15/歌词文件/蓝莲花.lrc"
int main(int argc, const char * argv[]) {
@autoreleasepool {
JYLrcParser *parser = [[JYLrcParser alloc] initWithFile:PATH];
//[parser showAllInfo];
//NSString *str = [parser getLrcByTime:10];
//printf("%s\n", [str UTF8String]);
int i = 0;
NSString *last = nil;
while (i < 100) {
NSString *str = [parser getLrcByTime:i];
if (last != str) {
last = str;
system("clear");
[parser showSongInfo];
printf("%s\n", [str UTF8String]);
}
i++;
sleep(1);
}
}
return 0;
}
