1.多线程下载文件思路：
开几个子线程来进行下载，通过设定请求头来下载各自的部分，通过NSFilehandle来把数据写进文件，这个类里有在任意位置写数据的方法。
2.文件的压缩和解压缩：第三方解压缩框架——ZipArchive
需要引入libz.dylib框架
导入头文件Main.h
创建压缩文件
+ (BOOL)createZipFileAtPath:(NSString *)path
withFilesAtPaths:(NSArray *)paths;
+ (BOOL)createZipFileAtPath:(NSString *)path
withContentsOfDirectory:(NSString *)directoryPath;
解压
+ (BOOL)unzipFileAtPath:(NSString *)path
toDestination:(NSString *)destination
3.NSURLConnection和Runloop
#import"ViewController.h"
@interfaceViewController()
@end
@implementationViewController
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent*)event
{
[selfnewThreadDelegate2];
}
-(void)delegate1
{
NSURLRequest*request = [NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"]];
//设置代理
//代理方法:默认是在主线程中调用的
NSURLConnection*connect = [NSURLConnectionconnectionWithRequest:requestdelegate:self];
//设置代理方法在哪个线程中调用
//[NSOperationQueue alloc]init]]开子线程
//[NSOperationQueue mainQueue]不能这样设置
[connectsetDelegateQueue:[[NSOperationQueuealloc]init]];
//[connect setDelegateQueue:[NSOperationQueue mainQueue]];
NSLog(@"-------");
}
-(void)delegate2
{
NSURLRequest*request = [NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"]];
//设置代理
//代理方法:默认是在主线程中调用的
NSURLConnection*connect = [[NSURLConnectionalloc]initWithRequest:requestdelegate:selfstartImmediately:NO];
[connectsetDelegateQueue:[[NSOperationQueuealloc]init]];
//开始发送请求
[connectstart];
NSLog(@"-------");
}
-(void)newThreadDelegate1
{
dispatch_async(dispatch_get_global_queue(0,0), ^{
NSURLRequest*request = [NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"]];
//设置代理
//代理方法:默认是在主线程中调用的
//该方法内部其实会将connect对象作为一个source添加到当前的runloop中,指定运行模式为默认
NSURLConnection*connect = [NSURLConnectionconnectionWithRequest:requestdelegate:self];
//设置代理方法在哪个线程中调用
[connectsetDelegateQueue:[[NSOperationQueuealloc]init]];
//[[NSRunLoop currentRunLoop] runMode:UITrackingRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:1000]];
[[NSRunLoopcurrentRunLoop]run];
NSLog(@"---%@----",[NSThreadcurrentThread]);
});
}
-(void)newThreadDelegate2
{
dispatch_async(dispatch_get_global_queue(0,0), ^{
NSURLRequest*request = [NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"]];
//设置代理
//代理方法:默认是在主线程中调用的
NSURLConnection*connect = [[NSURLConnectionalloc]initWithRequest:requestdelegate:selfstartImmediately:NO];
[connectsetDelegateQueue:[[NSOperationQueuealloc]init]];
//开始发送请求
//如如果connect对象没有添加到runloop中,那么该方法内部会自动的添加到runloop
//注意:如果当前的runloop没有开启,那么该方法内部会自动获得当前线程对应的runloop对象并且开启
[connectstart];
NSLog(@"---%@----",[NSThreadcurrentThread]);
});
}
#pragma mark ----------------------
#pragma mark NSURLConnectionDataDelegate
-(void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse*)response
{
NSLog(@"didReceiveResponse---%@",[NSThreadcurrentThread]);
}
@end