ios--多线程下载文件代码

妖狐艹你老母 2022-08-10 15:50 254阅读 0赞

.h文件：

NSString*FDownLoadDefaultFile;   //下载异常状态的默认文件
    NSString*FDownLoadLocalFilePath; //下载到本地的保存路径
    NSIntegerFDownLoadFileCount;     //当前下载的文件总数
    NSInteger FDownLoadID;            //下载序列ID
    
    
    NSMutableArray*FDownLoadFileArr;        //下载到本地的文件
    NSMutableArray*FDownLoadNetworkFilePathArr;    //需要下载到本地的网络文件路径
    
    NSCondition*FDownloadLockCondition;  //线程锁
    
    
    
    //下载文件
    //多线程下载文件
    -(void)DownloadFileByThread : (NSArray *)AFileArr                 //需要下载的文件集合数组
        ADownloadDirPath : (NSString *)ADownloadFilePath       //需要下载到本地的目录路径，结尾为“/”
    ADownloadDefaultFileURL : (NSString *)ADownloadDeaultFileURL; //如果需要下载的文件不存在，则需要下载的默认文件
    //下载主线程
    -(void)DownloadMainThread : (NSArray *)ADataArr;      //传递到线程中的数据集合，
          //位置0＝本地下载目录
    //位置1＝下载文件地址
          //位置2＝默认下载文件
    //位置3＝文件所属的位置索引号

.m文件：

-(void)SetDownloadFileID : (NSInteger)AID {
    FDownLoadID= AID;
    }
    
    
    -(void)DownloadFileByThread : (NSArray *)AFileArr
        ADownloadDirPath : (NSString *)ADownloadFilePath 
    ADownloadDefaultFileURL : (NSString *)ADownloadDeaultFileURL {
    NSInteger AFileCount = [AFileArr count];
    NSString *ALocalFile = ADownloadFilePath;
    NSString *AFileName;
    NSString *AFileURL;
    NSString *ADefaultFile;
    NSMutableArray*ADataArr;
    
    [[NSURLCachesharedURLCache] removeAllCachedResponses];
    FDownLoadNetworkFilePathArr= [[NSMutableArrayalloc] initWithArray:AFileArr];
    FDownLoadFileArr = [[NSMutableArray alloc] initWithCapacity:AFileCount];
    FDownLoadFileCount= 0;
    FDownloadLockCondition= [[NSConditionalloc] init];
    
    for (int i = 0; i < AFileCount; i++) {
    [FDownLoadFileArraddObject:@""];
    }
    
    
    for (int i = 0; i < AFileCount; i++) {
    AFileURL = [[NSString alloc] initWithString: [AFileArr objectAtIndex : i]];
    AFileName = [ALocalFile stringByAppendingString:[self GetFileName:AFileURL]];
    
    ADataArr = [[NSMutableArray alloc] initWithCapacity:3];
    [ADataArr addObject:ALocalFile];
    if([[NSFileManagerdefaultManager] fileExistsAtPath:AFileName] == NO) {
    //NSLog(@"%@",AFileURL);
    [ADataArr addObject:AFileURL];
    [ADataArr addObject:ADownloadDeaultFileURL];
    [ADataArr addObject:[[NSStringalloc] initWithFormat:@"%d",i]];
    
    [NSThreaddetachNewThreadSelector:@selector(DownloadMainThread:) toTarget:selfwithObject:ADataArr];
    [ADataArr release];
    }
    else {
    //NSLog(@"%@",AFileName);
    if (AFileURL == @"") {
    ADefaultFile = [ALocalFile stringByAppendingString:[self GetFileName:ADownloadDeaultFileURL]];
    if ([[NSFileManager defaultManager] fileExistsAtPath:ADefaultFile] == NO) {
    [ADataArr addObject:ADownloadDeaultFileURL];
    [ADataArr addObject:ADownloadDeaultFileURL];
    [ADataArr addObject:[[NSStringalloc] initWithFormat:@"%d",i]];
    [NSThreaddetachNewThreadSelector:@selector(DownloadMainThread:) toTarget:selfwithObject:ADataArr];
    [ADataArr release];
    }
    else {
    FDownLoadFileCount++;
    [FDownLoadFileArrreplaceObjectAtIndex:i withObject:ADefaultFile];
    //[FDownLoadFileArr addObject:ADefaultFile];
    }
    }
    else {
    FDownLoadFileCount++;
    [FDownLoadFileArrreplaceObjectAtIndex:i withObject:AFileName];
    //[FDownLoadFileArr setValue:AFileName forKey:[[NSString alloc] initWithFormat:@"%d",i]];
    //[FDownLoadFileArr addObject:AFileName];
    }
    
    
    }
    
    
    
    }
    if(FDownLoadFileCount== [FDownLoadNetworkFilePathArrcount]) {   //完成全部下载
    [self.delegate DownLoadFileDidFinish:FDownLoadFileArr AID : FDownLoadID];
    [FDownLoadNetworkFilePathArrrelease];
    [FDownLoadFileArrrelease];
    [FDownloadLockConditionrelease];
    
    }
    }
    
    
    -(void)DownloadMainThread : (NSArray *)ADataArr {
    NSString *ALocalFile = [ADataArr objectAtIndex:0];
    //NSLog(@"%@",[ADataArr objectAtIndex:1]);
    NSURL*AURL = [[NSURLalloc] initWithString:[ADataArr objectAtIndex:1]];
    NSData *AFileData = [[NSData alloc] initWithContentsOfURL:AURL];
    if (AFileData != nil) {
    ALocalFile = [ALocalFile stringByAppendingString:[self GetFileName:[ADataArr objectAtIndex:1]]]; 
    //NSLog(@"%@",ALocalFile);
    [AFileData writeToFile:ALocalFile atomically:YES];
    }
    else{    //不存在指定路径的文件，使用默认文件
    NSString *ADefaultFile = [ALocalFile stringByAppendingString:[self GetFileName:[ADataArr objectAtIndex:2]]];
    if ([[NSFileManager defaultManager] fileExistsAtPath:ADefaultFile] == NO) {
    [AURL release];
    [AFileData release];
    AURL = [[NSURLalloc] initWithString:[ADataArr objectAtIndex:2]];
    AFileData = [[NSData alloc] initWithContentsOfURL:AURL];
    if (AFileData != nil) {
    ALocalFile = [ALocalFile stringByAppendingString:[self GetFileName:[ADataArr objectAtIndex:1]]]; 
    [AFileData writeToFile:ALocalFile atomically:YES];
    }
    else {
    ALocalFile = [DocumentPathstringByAppendingString:@"default.png"];
    }
    
    
    }
    
    }
    //NSLog(@"ADataArr = %@",[ADataArr objectAtIndex:3]);
    [FDownloadLockConditionlock];    //上锁
    FDownLoadFileCount++;
    [FDownLoadFileArrreplaceObjectAtIndex:[[ADataArr objectAtIndex:3] intValue] withObject:ALocalFile];
    [FDownloadLockConditionunlock];  //解锁
    
    [AURL release];
    [ALocalFile release];
    [AFileData release];
    
    
    if(FDownLoadFileCount== [FDownLoadNetworkFilePathArrcount]) {   //完成全部下载
    [self.delegate DownLoadFileDidFinish:FDownLoadFileArr AID : FDownLoadID];
    [FDownLoadNetworkFilePathArrrelease];
    [FDownLoadFileArrrelease];
    [FDownloadLockConditionrelease];
    
    }
    }