ios多线程下载文件代码

.h文件&＃xff1a;

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IDNSMutableArray*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&＃xff0c;结尾为“/”
ADownloadDefaultFileURL : (NSString *)ADownloadDeaultFileURL; //如果需要下载的文件不存在&＃xff0c;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&＃xff0c;//位置0&＃xff1d;本地下载目录
//位置1&＃xff1d;下载文件地址//位置2&＃xff1d;默认下载文件
//位置3&＃xff1d;文件所属的位置索引号

.m文件&＃xff1a;

-(void)SetDownloadFileID : (NSInteger)AID {
FDownLoadID&＃61; AID;
}-(void)DownloadFileByThread : (NSArray *)AFileArrADownloadDirPath : (NSString *)ADownloadFilePath
ADownloadDefaultFileURL : (NSString *)ADownloadDeaultFileURL {
NSInteger AFileCount &＃61; [AFileArr count];
NSString *ALocalFile &＃61; ADownloadFilePath;
NSString *AFileName;
NSString *AFileURL;
NSString *ADefaultFile;
NSMutableArray*ADataArr;[[NSURLCachesharedURLCache] removeAllCachedResponses];
FDownLoadNetworkFilePathArr&＃61; [[NSMutableArrayalloc] initWithArray:AFileArr];
FDownLoadFileArr &＃61; [[NSMutableArray alloc] initWithCapacity:AFileCount];
FDownLoadFileCount&＃61; 0;
FDownloadLockCondition&＃61; [[NSConditionalloc] init];for (int i &＃61; 0; i [FDownLoadFileArraddObject:&＃64;""];
}for (int i &＃61; 0; i AFileURL &＃61; [[NSString alloc] initWithString: [AFileArr objectAtIndex : i]];
AFileName &＃61; [ALocalFile stringByAppendingString:[self GetFileName:AFileURL]];ADataArr &＃61; [[NSMutableArray alloc] initWithCapacity:3];
[ADataArr addObject:ALocalFile];
if([[NSFileManagerdefaultManager] fileExistsAtPath:AFileName] &＃61;&＃61; NO) {
//NSLog(&＃64;"%&＃64;",AFileURL);
[ADataArr addObject:AFileURL];
[ADataArr addObject:ADownloadDeaultFileURL];
[ADataArr addObject:[[NSStringalloc] initWithFormat:&＃64;"%d",i]];[NSThreaddetachNewThreadSelector:&＃64;selector(DownloadMainThread:) toTarget:selfwithObject:ADataArr];
[ADataArr release];
}
else {
//NSLog(&＃64;"%&＃64;",AFileName);
if (AFileURL &＃61;&＃61; &＃64;"") {
ADefaultFile &＃61; [ALocalFile stringByAppendingString:[self GetFileName:ADownloadDeaultFileURL]];
if ([[NSFileManager defaultManager] fileExistsAtPath:ADefaultFile] &＃61;&＃61; NO) {
[ADataArr addObject:ADownloadDeaultFileURL];
[ADataArr addObject:ADownloadDeaultFileURL];
[ADataArr addObject:[[NSStringalloc] initWithFormat:&＃64;"%d",i]];
[NSThreaddetachNewThreadSelector:&＃64;selector(DownloadMainThread:) toTarget:selfwithObject:ADataArr];
[ADataArr release];
}
else {
FDownLoadFileCount&＃43;&＃43;;
[FDownLoadFileArrreplaceObjectAtIndex:i withObject:ADefaultFile];
//[FDownLoadFileArr addObject:ADefaultFile];
}
}
else {
FDownLoadFileCount&＃43;&＃43;;
[FDownLoadFileArrreplaceObjectAtIndex:i withObject:AFileName];
//[FDownLoadFileArr setValue:AFileName forKey:[[NSString alloc] initWithFormat:&＃64;"%d",i]];
//[FDownLoadFileArr addObject:AFileName];
}}}
if(FDownLoadFileCount&＃61;&＃61; [FDownLoadNetworkFilePathArrcount]) { //完成全部下载
[self.delegate DownLoadFileDidFinish:FDownLoadFileArr AID : FDownLoadID];
[FDownLoadNetworkFilePathArrrelease];
[FDownLoadFileArrrelease];
[FDownloadLockConditionrelease];}
}-(void)DownloadMainThread : (NSArray *)ADataArr {
NSString *ALocalFile &＃61; [ADataArr objectAtIndex:0];
//NSLog(&＃64;"%&＃64;",[ADataArr objectAtIndex:1]);
NSURL*AURL &＃61; [[NSURLalloc] initWithString:[ADataArr objectAtIndex:1]];
NSData *AFileData &＃61; [[NSData alloc] initWithContentsOfURL:AURL];
if (AFileData !&＃61; nil) {
ALocalFile &＃61; [ALocalFile stringByAppendingString:[self GetFileName:[ADataArr objectAtIndex:1]]];
//NSLog(&＃64;"%&＃64;",ALocalFile);
[AFileData writeToFile:ALocalFile atomically:YES];
}
else{ //不存在指定路径的文件&＃xff0c;使用默认文件
NSString *ADefaultFile &＃61; [ALocalFile stringByAppendingString:[self GetFileName:[ADataArr objectAtIndex:2]]];
if ([[NSFileManager defaultManager] fileExistsAtPath:ADefaultFile] &＃61;&＃61; NO) {
[AURL release];
[AFileData release];
AURL &＃61; [[NSURLalloc] initWithString:[ADataArr objectAtIndex:2]];
AFileData &＃61; [[NSData alloc] initWithContentsOfURL:AURL];
if (AFileData !&＃61; nil) {
ALocalFile &＃61; [ALocalFile stringByAppendingString:[self GetFileName:[ADataArr objectAtIndex:1]]];
[AFileData writeToFile:ALocalFile atomically:YES];
}
else {
ALocalFile &＃61; [DocumentPathstringByAppendingString:&＃64;"default.png"];
}}}
//NSLog(&＃64;"ADataArr &＃61; %&＃64;",[ADataArr objectAtIndex:3]);
[FDownloadLockConditionlock]; //上锁
FDownLoadFileCount&＃43;&＃43;;
[FDownLoadFileArrreplaceObjectAtIndex:[[ADataArr objectAtIndex:3] intValue] withObject:ALocalFile];
[FDownloadLockConditionunlock]; //解锁[AURL release];
[ALocalFile release];
[AFileData release];if(FDownLoadFileCount&＃61;&＃61; [FDownLoadNetworkFilePathArrcount]) { //完成全部下载
[self.delegate DownLoadFileDidFinish:FDownLoadFileArr AID : FDownLoadID];
[FDownLoadNetworkFilePathArrrelease];
[FDownLoadFileArrrelease];
[FDownloadLockConditionrelease];}
}