最近在搗鼓音樂播放器,過程中學到了一些東西,寫下來分享一下,首先是歌詞的解析
首先我們看看lrc(不貼維基了怕打不開
歌詞文件一般是這樣的格式
1.[分鐘:秒.毫秒] 歌詞
2. [分鐘:秒] 歌詞
3. [分鐘:秒:毫秒] 歌詞
其中1是標准格式,下面我就一種為例。
思路是先獲取整個歌詞內容,再按換行分段,對每一行中的內容,分為兩部分,時間和內容,分別提取。
-(void)parselyric
{
NSString *path = [[NSBundle mainBundle]pathForResource:_lab_title.text ofType:@"lrc"];
//if lyric file exits
if ([path length]) {
//get the lyric string
NSString *lyc = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
//init
_musictime = [[NSMutableArray alloc]init];
_lyrics = [[NSMutableArray alloc]init];
_t = [[NSMutableArray alloc]init];
NSArray *arr = [lyc componentsSeparatedByString:@"\n"];
for (NSString *item in arr) {
//if item is not empty
if ([item length]) {
NSRange startrange = [item rangeOfString:@"["];
NSLog(@"%d%d",startrange.length,startrange.location);
NSRange stoprange = [item rangeOfString:@"]"];
NSString *content = [item substringWithRange:NSMakeRange(startrange.location+1, stoprange.location-startrange.location-1)];
NSLog(@"%d",[item length]);
//the music time format is mm.ss.xx such as 00:03.84
if ([content length] == 8) {
NSString *minute = [content substringWithRange:NSMakeRange(0, 2)];
NSString *second = [content substringWithRange:NSMakeRange(3, 2)];
NSString *mm = [content substringWithRange:NSMakeRange(6, 2)];
NSString *time = [NSString stringWithFormat:@"%@:%@.%@",minute,second,mm];
NSNumber *total =[NSNumber numberWithInteger:[minute integerValue] * 60 + [second integerValue]];
[_t addObject:total];
NSString *lyric = [item substringFromIndex:10];
[_musictime addObject:time];
[_lyrics addObject:lyric];
}
}
}
}
else
_lyrics = nil;