iOS 网络请求类封装

转载自：http://www.cnblogs.com/gcb999/p/3213601.html

感谢

#import "JSNetWork.h"//asiHttpRequest#import "ASIFormDataRequest.h"//xml 的解析#import "UseXmlParser.h"//判断是否联网#import "Reachability.h"//sbJson，判断json的解析#import "JSON.h"@implementation JSNetWork//创建一个单例+(JSNetWork*)shareNetWork{static JSNetWork *network = NULL;static dispatch_once_t onceToken;dispatch_once(&onceToken, ^{network = [[self alloc] init];});return network;}-(NSString*)JiangSuApiCacheFileName:(NSString*)fileName{NSString * cacheFolder = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];cacheFolder = [cacheFolder stringByAppendingPathComponent:@"JiangSu"];NSFileManager * fmgr = [NSFileManager defaultManager];if (![fmgr fileExistsAtPath:cacheFolder]){NSError * error;[fmgr createDirectoryAtPath:cacheFolder withIntermediateDirectories:YES attributes:nil error:&error];}cacheFolder = [cacheFolder stringByAppendingPathComponent:fileName];return cacheFolder;}-(NSDictionary*)getURLFromPlistWithKey:(NSString*)plKey{NSString *path = [[NSBundle mainBundle] pathForResource:@"JiangSuURL" ofType:@"plist"];NSDictionary *urlDic = [NSDictionary dictionaryWithContentsOfFile:path];return ASDynamicCast(NSDictionary, [urlDic valueForKey:plKey]);}//网络请求方式--因为是单例所有传递的值要不同  必须加connectId-(void)JSNetWorkWith:(int)connectID Body:(NSString*)bodyString PostBody:(NSString*)postBody Delegate:(id)aDelegate{//判断是否联网if (![self isConnectNetWork]) {UIAlertView *myalert = [[UIAlertView alloc] initWithTitle:nil message:@"请连接网络后再使用" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil];myalert.tag = 0x9999;[myalert show];[myalert release];if (aDelegate && [aDelegate respondsToSelector:@selector(NetWorkBackConnectID:BackString:WithNetState:)]) {[aDelegate NetWorkBackConnectID:connectID BackString:nil WithNetState:0];}return;}if ([bodyString hasPrefix:@"http"] == NO) {bodyString = [NSString stringWithFormat:@"%@/%@",HTTPURLPREFIX,bodyString];}ASIFormDataReq4000uest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:bodyString]];[request setDelegate:self];request.timeOutSeconds = 20;[request setRequestMethod:@"POST"];[request addRequestHeader:@"Content-Type" value:@"application/xml;charset=UTF-8;"];NSArray *aa = [postBody componentsSeparatedByString:@"&"];for (NSString *str in aa) {NSArray *bb = [str componentsSeparatedByString:@"="];[request setPostValue:[bb objectAtIndex:1] forKey:[bb objectAtIndex:0]];}//传递参数[request setUserInfo:[NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"%d",connectID],@"tag",aDelegate,@"target", nil]];[request startAsynchronous];}//请求成功- (void)requestFinished:(ASIHTTPRequest *)request{NSDictionary *userInfo = [request userInfo];id delegate = [userInfo objectForKey:@"target"];int conTag = [[userInfo objectForKey:@"tag"] intValue];NSLog(@"\n成功  地址:%@  \n ConnectId = %d   结果 = %@",[[request url] absoluteString],conTag,[request responseString]);NSString *responseString = [request responseString];//    if ([responseString hasPrefix:@"<?xml"]) {//        responseString = [responseString stringByReplacingOccurrencesOfString:@"\r" withString:@""];//        responseString = [responseString stringByReplacingOccurrencesOfString:@"\n" withString:@""];//        responseString = [responseString stringByReplacingOccurrencesOfString:@"<?xml version=\"1.0\" encoding=\"GBK\"?>" withString:xmlHeader];////        UseXmlParser *xmlParser = [[UseXmlParser alloc] initWithParserData:[responseString dataUsingEncoding:NSUTF8StringEncoding] target:delegate connectId:conTag];//        [xmlParser parser];//        [xmlParser release];//    }else{NSLog(@"%@",[responseString JSONValue]);//得到数据源，通过代理返回if (delegate && [delegate respondsToSelector:@selector(NetWorkBackConnectID:BackString:WithNetState:)]) {[delegate NetWorkBackConnectID:conTag BackString:responseString WithNetState:0];}//    }}//请求失败- (void)requestFailed:(ASIHTTPRequest *)request{NSLog(@"错误信息:%@",[request error]);NSDictionary *userInfo = [request userInfo];id delegate = [userInfo objectForKey:@"target"];#pragma unused(delegate)int conTag = [[userInfo objectForKey:@"tag"] intValue];NSLog(@"\n失败  地址:%@  \n ConnectId = %d   结果 = %@",[[request url] absoluteString],conTag,[request responseString]);if (delegate && [delegate respondsToSelector:@selector(NetWorkBackConnectID:BackDic:WithNetState:)]) {[delegate NetWorkBackConnectID:conTag BackDic:nil WithNetState:0];}if (delegate && [delegate respondsToSelector:@selector(NetWorkBackConnectID:BackString:WithNetState:)]) {[delegate NetWorkBackConnectID:conTag BackString:@"" WithNetState:0];}UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"" message:@"数据请求失败" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];[av show];[av release];}// 判断是否联网-(BOOL)isConnectNetWork{BOOL isExistenceNetwork = YES;Reachability *r = [Reachability reachabilityWithHostName:@"www.baidu.com"];switch ([r currentReachabilityStatus]) {case NotReachable:isExistenceNetwork=NO;NSLog(@"没有网络");break;case ReachableViaWWAN:isExistenceNetwork=YES;NSLog(@"正在使用3G网络");break;case ReachableViaWiFi:isExistenceNetwork=YES;NSLog(@"正在使用wifi网络");break;}return isExistenceNetwork;}//弹出WiFi- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{if (alertView.tag == 0x9999) {[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=WIFI"]];//        exit(0);}}@end

#pragma  mark -请求信息-(void)RentNewsRequest{NSString *ss = [NSString stringWithFormat:@"szzssw/taxCommon.action?code=1001&pagecode=%d&menucode=0300000000",NewsView.pageCode == 0 ? 1 : NewsView.pageCode];[[JSNetWork shareNetWork] JSNetWorkWith:100 Body:ss PostBody:nil Delegate:self];//先充缓存里面去读取NSString *cachestr=[self readApiCacheFileName:@"地税新闻列表.txt"];//只是对上拉信息，读取缓存if(cachestr.length>0 &&NewsView.pageCode==1){[self NetWorkBackConnectID:100 BackString:cachestr WithNetState:0];}}#pragma  mark -数据完成信息- (void)NetWorkBackConnectID:(int)connectID BackString:(NSString *)aBackString WithNetState:(int)netState{NewsView.aTable.pullTableIsRefreshing=YES;NewsView.aTable.pullTableIsLoadingMore=YES;NewsView.aTable.pullTableIsRefreshing=NO;NewsView.aTable.pullTableIsLoadingMore=NO;if(connectID==100){NSDictionary *jsonDic=ASDynamicCast(NSDictionary, [aBackString JSONValue]);//根据请求的内容判断请求是否成功if (![[jsonDic getStringByKey:@"dealcode"] isEqualToString:@"0000"]) {NSLog(@"请求失败-->%@",[jsonDic getStringByKey:@"dealmsg"]);return;}//如果是上拉,进行缓存if (NewsView.pageCode==1) {[self saveApiCacheFileName:@"地税新闻列表.txt" textContent:aBackString Append:NO];}if (NewsView.dataArray.count>0 &&NewsView.pageCode==1) {[NewsView.dataArray removeAllObjects];//向下拉只显示20条，下拉只显示就叠加}NSArray *contentArray=ASDynamicCast(NSDictionary, [aBackString JSONValue])[@"content"];[NewsView.dataArray addObjectsFromArray:contentArray];[NewsView.aTable reloadData];}}