post NSURLConnection请求网络数据

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

[self httpSendDataWithUrl:@"http://127.0.0.1/php/login.php" andUserName:@"zhang&san" andPsw:@"zhang"];

}

-(void)httpSendDataWithUrl:(NSString*)url andUserName:(NSString*)username andPsw:(NSString*)psw

{

//get请求的时候URL中的汉字空格,特殊字符不会进行编码,如果不自行编码,会出现错喔

NSString *name=username;

//oc 自带方法只会对空格汉字进行转义,不会转义特殊字符

name=[name stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

//对特殊字符进行转义

name=[self encodeToPercentEscapeString:name];

NSString *pwd=psw;

NSString *httpUrl=url;

//----------------------Get方法的URL-------------

//    NSString *str=[NSString stringWithFormat:@"?username=%@&password=%@",name,pwd];

//    httpUrl=[httpUrl stringByAppendingString:str];

//    NSURLRequest*request=[NSURLRequest requestWithURL:[NSURL URLWithString:httpUrl]];

//----------------------Get方法的URL-------------

//----------------------Post方法的URL和请求头-----------

NSMutableURLRequest *mRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:httpUrl]];

mRequest.HTTPMethod=@"post";

NSString *strBody=[NSString stringWithFormat:@"username=%@&password=%@",name,pwd];

mRequest.HTTPBody=[strBody dataUsingEncoding:NSUTF8StringEncoding];

//----------------------Post方法的URL和请求头-----------

[NSURLConnection sendAsynchronousRequest:mRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

if (!connectionError) {

NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;

if (httpResponse.statusCode == 200) {

NSError *error=nil;

id json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];

if (error) {

NSLog(@"json解析错误!!!!!!");

}

else

{

NSLog(@"%@",json);

}

}else{

NSLog(@"服务器内部错误");

}

}else{

NSLog(@"请求错误%@",connectionError);

}

}];

}

//进行url编码 （但是不对汉字和空格进行编码）

- (NSString *)encodeToPercentEscapeString: (NSString *) input

{

NSString *outputStr = (NSString *) CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,(CFStringRef)input,NULL,(CFStringRef)@"!*'();:@&=+ $,/?%#[]",kCFStringEncodingUTF8));

return outputStr;

}

//url解码

- (NSString *)decodeFromPercentEscapeString: (NSString *) input

{

return [input

stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding] ;

}

@end