如何選擇AFNetworking版本
官網(wǎng)下載2.5版本:http:///
此文章基于AFNetworking2.0,,如果您使用的是2.5版本的,,請看這篇文章:AFNetworking2.5使用
首先得下載AFNetworking庫文件,下載時(shí)得首先弄清楚,,你將要開發(fā)的軟件兼容的最低版本是多少,。AFNetworking 2.0或者之后的版本需要xcode5.0版本并且只能為IOS6或更高的手機(jī)系統(tǒng)上運(yùn)行,如果開發(fā)MAC程序,,那么2.0版本只能在MAC
OS X 10.8或者更高的版本上運(yùn)行,。
AFNetworking 2.0的下載地址https://github.com/AFNetworking/AFNetworking
如果你想要兼容IOS5或MAC OS X 10.7,那你需要用最新發(fā)布的1.x版本
AFNetworking 1.x的下載地址https://github.com/AFNetworking/AFNetworking/tree/1.x
如果要兼容4.3或者M(jìn)AC OS X 10.6,,需要用最新發(fā)布的0.10.x版本
AFNetworking 0.10.xhttps://github.com/AFNetworking/AFNetworking/tree/0.10.x
如何通過URL獲取json數(shù)據(jù)
第一種,,利用AFJSONRequestOperation,官方網(wǎng)站上給的例子:
- NSString *str=[NSString stringWithFormat:@"https://alpha-api./stream/0/posts/stream/global"];
- NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
- NSURLRequest *request = [NSURLRequest requestWithURL:url];
- // 從URL獲取json數(shù)據(jù)
- AFJSONRequestOperation *operation1 = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSDictionary* JSON) {
- NSLog(@"獲取到的數(shù)據(jù)為:%@",JSON);
- } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id data) {
- NSLog(@"發(fā)生錯(cuò)誤,!%@",error);
- }];
- [operation1 start];
第二種方法,,利用AFHTTPRequestOperation 先獲取到字符串形式的數(shù)據(jù),然后轉(zhuǎn)換成json格式,,將NSString格式的數(shù)據(jù)轉(zhuǎn)換成json數(shù)據(jù),,利用IOS5自帶的json解析方法:
- NSString *str=[NSString stringWithFormat:@"https://alpha-api./stream/0/posts/stream/global"];
- NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
- NSURLRequest *request = [NSURLRequest requestWithURL:url];
- AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];
- [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, idresponseObject) {
- NSString *html = operation.responseString;
- NSData* data=[html dataUsingEncoding:NSUTF8StringEncoding];
- id dict=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
- NSLog(@"獲取到的數(shù)據(jù)為:%@",dict);
- }failure:^(AFHTTPRequestOperation *operation, NSError *error) {
- NSLog(@"發(fā)生錯(cuò)誤!%@",error);
- }];
- NSOperationQueue *queue = [[NSOperationQueue alloc] init];
- [queue addOperation:operation];
如果發(fā)生Error Domain=NSURLErrorDomain Code=-1000 "bad URL" UserInfo=0x14defc80 {NSUnderlyingError=0x14deea10 "bad URL", NSLocalizedDescription=bad URL這個(gè)錯(cuò)誤,,請檢查URL編碼格式,。有沒有進(jìn)行stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding
如何通過URL獲取圖片
異步獲取圖片,通過隊(duì)列實(shí)現(xiàn),,而且圖片會(huì)有緩存,在下次請求相同的鏈接時(shí),,系統(tǒng)會(huì)自動(dòng)調(diào)用緩存,,而不從網(wǎng)上請求數(shù)據(jù)。
- UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 100.0f, 100.0f, 100.0f)]; [imageView setImageWithURL:[NSURL URLWithString:@"http://i./r4uwx.jpg"]placeholderImage:[UIImage imageNamed:@"placeholder-avatar"]]; [self.view addSubview:imageView];
- 上面的方法是官方提供的,,還有一種方法,,
- NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www./wp-content/uploads/2013/01/scene.png"]];
- AFImageRequestOperation *operation = [AFImageRequestOperation imageRequestOperationWithRequest:request imageProcessingBlock:nil success:^(NSURLRequest *request, NSHTTPURLResponse*response, UIImage *image) {
- self.backgroundImageView.image = image;
- } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
- NSLog(@"Error %@",error);
- }];
-
- [operation start];
如果使用第一種URLWithString: placeholderImage:會(huì)有更多的細(xì)節(jié)處理,其實(shí)實(shí)現(xiàn)還是通過AFImageRequestOperation處理,,可以點(diǎn)擊URLWithString: placeholderImage:方法進(jìn)去看一下就一目了然了,。所以我覺得還是用第一種好。
如何通過URL獲取plist文件
通過url獲取plist文件的內(nèi)容,,用的很少,,這個(gè)方法在官方提供的方法里面沒有
- NSString *weatherUrl = @"http://www./buick/kls/Buickhousekeeper.plist";
- NSURL *url = [NSURL URLWithString:[weatherUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
- NSURLRequest *request = [NSURLRequest requestWithURL:url];
- [AFPropertyListRequestOperation addAcceptableContentTypes:[NSSet setWithObject:@"text/plain"]];
- AFPropertyListRequestOperation *operation = [AFPropertyListRequestOperation propertyListRequestOperationWithRequest:request success:^(NSURLRequest *request,NSHTTPURLResponse *response, id propertyList) {
- NSLog(@"%@",(NSDictionary *)propertyList);
-
- }failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, idpropertyList) {
- NSLog(@"%@",error);
- }];
-
- [operation start];
如何通過URL獲取XML數(shù)據(jù)
xml解析使用AFXMLRequestOperation,需要實(shí)現(xiàn)蘋果自帶的NSXMLParserDelegate委托方法,,XML中有一些不需要的協(xié)議格式內(nèi)容,,所以就不能像json那樣解析,,還得實(shí)現(xiàn)委托。我之前有想過能否所有的XML鏈接用一個(gè)類處理,,而且跟服務(wù)端做了溝通,,結(jié)果很不方便,效果不好,。XML大多標(biāo)簽不同,,格式也不固定,所以就有問題,,使用json就要方便的多,。
第一步;在.h文件中加入委托NSXMLParserDelegate
第二步,;在.m文件方法中加入代碼
- NSURL *url = [NSURL URLWithString:@"http://113.106.90.22:5244/sshopinfo"];
- NSURLRequest *request = [NSURLRequest requestWithURL:url];
- AFXMLRequestOperation *operation =
- [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest*request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
- XMLParser.delegate = self;
- [XMLParser setShouldProcessNamespaces:YES];
- [XMLParser parse];
- }failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser*XMLParser) {
- NSLog(@"%@",error);
- }];
- [operation start];
第三步,;在.m文件中實(shí)現(xiàn)委托方法
//在文檔開始的時(shí)候觸發(fā)
-
- (void)parserDidStartDocument:(NSXMLParser *)parser{
- NSLog(@"解析開始!");
- }
- //解析起始標(biāo)記
- - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary*)attributeDict{
- NSLog(@"標(biāo)記:%@",elementName);
-
- }
- //解析文本節(jié)點(diǎn)
- - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
- NSLog(@"值:%@",string);
- }
- //解析結(jié)束標(biāo)記
- - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
- NSLog(@"結(jié)束標(biāo)記:%@",elementName);
- }
- //文檔結(jié)束時(shí)觸發(fā)
- -(void) parserDidEndDocument:(NSXMLParser *)parser{
- NSLog(@"解析結(jié)束,!");
- }
運(yùn)行的結(jié)果:
如何使用AFHTTPClient進(jìn)行web service操作
- AFHTTPClient處理GET 和 POST請求.做網(wǎng)頁的朋友們這個(gè)方法用的比較多,。在要經(jīng)常調(diào)用某個(gè)請求時(shí),可以封裝,,節(jié)省資源,。
- BaseURLString = @"http://www./downloads/weather_sample/";
- NSURL *baseURL = [NSURL URLWithString:[NSString stringWithFormat:BaseURLString]];
- NSDictionary *parameters = [NSDictionary dictionaryWithObject:@"json" forKey:@"format"];
- AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL];
-
- [client registerHTTPOperationClass:[AFJSONRequestOperation class]];
- [client setDefaultHeader:@"Accept" value:@"text/html"];
- [client postPath:@"weather.php" parameters:parameters success:^(AFHTTPRequestOperation*operation, id responseObject) {
- NSString* newStr = [[NSString alloc] initWithData:responseObjectencoding:NSUTF8StringEncoding];
- NSLog(@"POST請求:%@",newStr);
- }failure:^(AFHTTPRequestOperation *operation, NSError *error) {
- NSLog(@"%@",error);
- }];
-
- [client getPath:@"weather.php" parameters:parameters success:^(AFHTTPRequestOperation*operation, id responseObject) {
- NSString* newStr = [[NSString alloc] initWithData:responseObjectencoding:NSUTF8StringEncoding];
- NSLog(@"GET請求:%@",newStr);
- }failure:^(AFHTTPRequestOperation *operation, NSError *error) {
- NSLog(@"%@",error);
- }];
運(yùn)行結(jié)果:
如果需要顯示網(wǎng)絡(luò)活動(dòng)指示器,可以用下面方法:
- [AFNetworkActivityIndicatorManager sharedManager].enabled = YES;
Error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Request failed: unacceptable content-type: text/html" UserInfo=0x16774de0 {NSErrorFailingURLKey=http://192.168.2.2:8181/ecar/tsp/uploadLocation?CID=781666&serviceType=1, AFNetworkingOperationFailinponseErrorKey=
{ URL: http://192.168.2.2:8181/ecar/tsp/uploadLocation?CID=781666&serviceType=1 } { status code: 200, headers {
XXX
} }, NSLocalizedDescription=Request failed: unacceptable content-type: text/html}
返回?cái)?shù)據(jù)格式不對,。注銷這句話: op.responseSerializer = [AFJSONResponseSerializerserializer];然后將返回的數(shù)據(jù)自己轉(zhuǎn)換,。
demo下載地址:點(diǎn)擊打開下載界面
此文章基于AFNetworking2.0,如果您使用的是2.5版本的,,請看這篇文章:AFNetworking2.5使用
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