标签：style blog http io ar color os sp for
NSData
Foundation
NSURL/NSURLRequest/NSURLConeection
NSNetService/NSNetServiceBrowser
Core Foundation
CFNetwork
CFNetService
BSD Sockets
（1）获取图片
- NSData *data = [[NSData alloc] initWithContentsOfURL:url];
- NSData *data = [NSData dataWithContentsOfURL:url];
NSData *data = [[NSData alloc] initWithContentsOfURL:url];
NSData *data = [NSData dataWithContentsOfURL:url];
例子：
- NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
- //根据网络数据，获得到image资源
- NSData *data = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:self.picUrlString]];
- UIImage *image = [[UIImage alloc] initWithData:data];
- [data release];
- //回到主线程，显示图片信息
- [self performSelectorOnMainThread:@selector(displayImage:) withObject:image waitUntilDone:NO];
- [image release];
-
- [pool release];
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
//根据网络数据，获得到image资源
NSData *data = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:self.picUrlString]];
UIImage *image = [[UIImage alloc] initWithData:data];
[data release];
//回到主线程，显示图片信息
[self performSelectorOnMainThread:@selector(displayImage:) withObject:image waitUntilDone:NO];
[image release];
[pool release];
异步
- NSURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
- NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
NSURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
（2）GET方法
- NSURL *url = [NSURL URLWithString:urlString];
- NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
- NSHTTPURLResponse *response = [[NSHTTPURLResponse alloc] init];
- NSData *retData = [NSURLConnection sendSynchronousRequest:theRequest
- returningResponse:&response error:nil];
- NSString *retString = [[NSString alloc] initWithData:retData encoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
NSHTTPURLResponse *response = [[NSHTTPURLResponse alloc] init];
NSData *retData = [NSURLConnection sendSynchronousRequest:theRequest
returningResponse:&response error:nil];
NSString *retString = [[NSString alloc] initWithData:retData encoding:NSUTF8StringEncoding];
（3）post方法
- NSURL *url = [NSURL URLWithString:urlString];
- NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
- NSString *postString = @"test=3";
- NSData *postData = [postString dataUsingEncoding:NSUTF8StringEncoding];
- NSString *msgLength = [NSString stringWithFormat:@"%d", [postData length]];
- [theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];
- [theRequest setHTTPMethod:@"POST"];
- [theRequest setHTTPBody: postData];
- NSHTTPURLResponse *response =[[NSHTTPURLResponse alloc] init];
- NSData *retData = [NSURLConnection sendSynchronousRquest:theRequest returningResponse:&response error:nil];
2014.12.3 网络应用
标签：style blog http io ar color os sp for
原文地址：http://www.cnblogs.com/mybelief/p/4147826.html
