标签：
一：NSURLConnection（IOS9.0已经弃用）是早期apple提供的http访问方式。以下列出了常用的几个场景：GET请求，POST请求，Response中带有json数据
对于NSURLConnection有以下注意事项：（1）sendAsynchronourequest: queue: completionHandler:函数中的queue参数表示的是“handler 这个block运行在queue中，如果queue为mainThread，那么hanlder就运行在主线程；所以在处理UI的时候需要注意这个参数”
（1）Get请求（返回文本）
//Request NSMutableURLRequest *urlRequest = [NSMutableURLRequest new]; [urlRequest setURL:[NSURL URLWithString:@"http://XXX.sinaapp.com/test/test.php?namr&id=43"]]; [urlRequest setTimeoutInterval:10.0f]; [urlRequest setHTTPMethod:@"GET"]; [urlRequest setCachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData]; NSOperationQueue *queue = [[NSOperationQueue alloc]init]; [NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
//根据回复Headers，确认是是否为NSHTTPURLResponse的对象 if([response isKindOfClass:[NSHTTPURLResponse class]]){ NSHTTPURLResponse *resHttp = (NSHTTPURLResponse *)response; NSLog(@"status = %ld",resHttp.statusCode);//200 304 401...... NSDictionary *dicHeader = resHttp.allHeaderFields; NSLog(@"headers = %@",dicHeader); } else{ NSLog(@"not http"); }
if(data){ NSString *html = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"%@",html); } }];
//Request NSMutableURLRequest *urlRequest = [NSMutableURLRequest new]; [urlRequest setURL:[NSURL URLWithString:@"http://XXX.sinaapp.com/test/test.php"]]; [urlRequest setTimeoutInterval:10.0f]; [urlRequest setHTTPMethod:@"POST"]; [urlRequest setCachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData]; NSString *strBody = @"p1=abc&p2=12"; [urlRequest setHTTPBody:[strBody dataUsingEncoding:NSUTF8StringEncoding]]; NSOperationQueue *queue = [[NSOperationQueue alloc]init];
[NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) { //确认是http if([response isKindOfClass:[NSHTTPURLResponse class]]){ NSHTTPURLResponse *resHttp = (NSHTTPURLResponse *)response; NSLog(@"status = %ld",resHttp.statusCode);//200 304 401...... NSDictionary *dicHeader = resHttp.allHeaderFields; NSLog(@"headers = %@",dicHeader); } else{ NSLog(@"not http"); } if(data){ NSString *html = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"%@",html); } }];
（3）Response中有Json数据
//Request
NSMutableURLRequest *urlRequest = [NSMutableURLRequest new];
[urlRequest setURL:[NSURL URLWithString:@"http://XXX.sinaapp.com/test/test.php"]];
[urlRequest setTimeoutInterval:10.0f];
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setCachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData];
NSString *strBody = @"p1=abc&p2=12";
[urlRequest setHTTPBody:[strBody dataUsingEncoding:NSUTF8StringEncoding]];
NSOperationQueue *queue = [[NSOperationQueue alloc]init];
[NSURLConnection
sendAsynchronousRequest:urlRequest
queue:queue
completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
NSError *err2 = nil;
id jsonObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&err2];
if([jsonObject isKindOfClass:[NSDictionary class]]){
NSLog(@"NSDictionary");
NSDictionary *dic = jsonObject;
NSLog(@"dic = %@",dic);
}
else if([jsonObject isKindOfClass:[NSArray class]]){
NSLog(@"NSDictionary");
NSDictionary *arr = jsonObject;
NSLog(@"arr = %@",arr);
}
}];
（4）Request中带有Json格式数据
标签：
原文地址：http://www.cnblogs.com/dongfangchun/p/5285176.html
