IOS开发——获取本地音频文件(属性/信息)

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IOS开发——获取本地音频文件(属性/信息)

要使用AVURLAsset需要引用#import <AVFoundation/AVFoundation.h>，框架

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获取本地音频文件地址：

        NSString *songsDirectory=MUSIC_FILE_ALL;//沙盒地址    NSBundle *songBundle=[NSBundle bundleWithPath:songsDirectory];    NSString *bundlePath=[songBundle resourcePath];     NSArray *arrMp3=[NSBundle pathsForResourcesOfType:@"mp3" inDirectory:bundlePath];    for (NSString *filePath in arrMp3) {        [self.wMp3URL addObject:filePath];    }

解析音频文件属性：

-(void)mDefineUpControl{    NSString *filePath = [self.wMp3URL objectAtIndex: 0 ];//随便取一个，说明    //文件管理，取得文件属性    NSFileManager *fm = [NSFileManager defaultManager];    NSDictionary *dictAtt = [fm attributesOfItemAtPath:filePath error:nil];       //取得音频数据       NSURL *fileURL=[NSURL fileURLWithPath:filePath];    AVURLAsset *mp3Asset=[AVURLAsset URLAssetWithURL:fileURL options:nil]；    NSString *singer;//歌手    NSString *song;//歌曲名    UIImage *image;//图片    NSString *albumName;//专辑名    NSString *fileSize;//文件大小    NSString *voiceStyle;//音质类型    NSString *fileStyle;//文件类型    NSString *creatDate;//创建日期    NSString *savePath; //存储路径        for (NSString *format in [mp3Asset availableMetadataFormats]) {        for (AVMetadataItem *metadataItem in [mp3Asset metadataForFormat:format]) {            if([metadataItem.commonKey isEqualToString:@"title"]){                song = (NSString *)metadataItem.value;//歌曲名            }else if ([metadataItem.commonKey isEqualToString:@"artist"]){                singer = (NSString *)metadataItem.value;//歌手            }            //            专辑名称            else if ([metadataItem.commonKey isEqualToString:@"albumName"])            {                albumName = (NSString *)metadataItem.value;            }else if ([metadataItem.commonKey isEqualToString:@"artwork"]) {                NSDictionary *dict=(NSDictionary *)metadataItem.value;                NSData *data=[dict objectForKey:@"data"];                image=[UIImage imageWithData:data];//图片            }                }    }    savePath = filePath;    float tempFlo = [[dictAtt objectForKey:@"NSFileSize"] floatValue]/(1024*1024);    fileSize = [NSString stringWithFormat:@"%.2fMB",[[dictAtt objectForKey:@"NSFileSize"] floatValue]/(1024*1024)];    NSString *tempStrr  = [NSString stringWithFormat:@"%@", [dictAtt objectForKey:@"NSFileCreationDate"]] ;    creatDate = [tempStrr substringToIndex:19];    fileStyle = [filePath substringFromIndex:[filePath length]-3];    if(tempFlo <= 2){        voiceStyle = @"普通";    }else if(tempFlo > 2 && tempFlo <= 5){        voiceStyle = @"良好";    }else if(tempFlo > 5 && tempFlo < 10){        voiceStyle = @"标准";    }else if(tempFlo > 10){        voiceStyle = @"高清";    }         NSArray *tempArr = [[NSArray alloc] initWithObjects:@"歌手:",@"歌曲名称:",@"专辑名称:",@"文件大小:",@"音质类型:",@"文件格式:",@"创建日期:",@"保存路径:", nil];    NSArray *tempArrInfo = [[NSArray alloc] initWithObjects:singer,song,albumName,fileSize,voiceStyle,fileStyle,creatDate,savePath, nil];    for(int i = 0;i < [tempArr count]; i ++){        NSString *strTitle = [tempArr objectAtIndex:i];        UILabel *titleLab = [[UILabel alloc] initWithFrame:CGRectMake(5, 5+i*30, 16*[strTitle length], 25)];        [titleLab setText:strTitle];        [titleLab setTextColor:[WASharedFontStyle mGetSharedFontColor]];        [titleLab setFont:[UIFont systemFontOfSize:16]];        [self.wInfoSV addSubview:titleLab];                NSString *strInfo = [tempArrInfo objectAtIndex:i];        UILabel *infoLab = [[UILabel alloc] initWithFrame:CGRectMake(titleLab.frame.origin.x+titleLab.bounds.size.width+5, 5+i*30, self.view.bounds.size.width-(titleLab.frame.origin.x+titleLab.bounds.size.width+5)-5, 25)];        [infoLab setText:strInfo];        [infoLab setTextColor:[WASharedFontStyle mGetSharedFontColor]];        [infoLab setFont:[UIFont systemFontOfSize:16]];        [self.wInfoSV addSubview:infoLab];                if(i == [tempArr count]-1){            [infoLab setFrame:CGRectMake(titleLab.frame.origin.x+titleLab.bounds.size.width+5, 5+i*30, self.view.bounds.size.width-(titleLab.frame.origin.x+titleLab.bounds.size.width+5)-5, 30*4)];            [infoLab setLineBreakMode:NSLineBreakByWordWrapping];            [infoLab setFont:[UIFont systemFontOfSize:12]];            [infoLab setNumberOfLines:0];        }                [self.wInfoSV setContentSize:CGSizeMake(self.view.bounds.size.width, i*45)];            }}

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