网络2-AFNetworking和WebView
来源:互联网 发布:图片制作拼图软件 编辑:程序博客网 时间:2024/05/22 18:23
网络2-AFNetworking和WebView
1.AFNNetworking 2.0
你相信你一定知道AFNNetworking,不知道你还可以看看该作者的博文,所以我就不多说关于它的强大之处了,AFNetworking 提供了比NSURLSession更高层次的抽象,这篇文章主要总结AFNNetworking 2.0的几个常用方法。
1).GET和POST请求
GET:
- (NSURLSessionDataTask *)GET:(NSString *)URLString parameters:(id)parameters success:(void (^)(NSURLSessionDataTask *task, id responseObject))success failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
POST:
- (NSURLSessionDataTask *)POST:(NSString *)URLString parameters:(id)parameters success:(void (^)(NSURLSessionDataTask *task, id responseObject))success failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
在实际的开发中,我比较习惯把第三方的代码进行一层封装,如下我们把GET和POST请求封装起来:
//GET+ (void)getWithPath:(NSString *)path params:(NSDictionary *)params success:(HttpSuccessBlock)success failure:(HttpFailureBlock)failure{ [self requestWithPath:path params:params success:success failure:failure method:@"GET"];}//POST+ (void)postWithPath:(NSString *)path params:(NSDictionary *)params success:(HttpSuccessBlock)success failure:(HttpFailureBlock)failure{ [self requestWithPath:path params:params success:success failure:failure method:@"POST"];}
typedef void (^HttpSuccessBlock)(id JSON);typedef void (^HttpFailureBlock)(NSError *error);...省略+ (void)requestWithPath:(NSString *)path params:(NSDictionary *)params success:(HttpSuccessBlock)success failure:(HttpFailureBlock)failure method:(NSString *)method{ AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithBaseURL:[NSURL URLWithString:kBaseURL]]; manager.responseSerializer = [AFJSONResponseSerializer serializer]; manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/plain",@"application/json", @"text/json", @"text/javascript", @"text/html", nil]; if ([method isEqual: @"GET"]) { [manager GET:path parameters:params success:^(NSURLSessionDataTask *task, id responseObject) { success(responseObject); } failure:^(NSURLSessionDataTask *task, NSError *error) { NSLog(@"fail Get!!%@",error); failure(error); }]; }else if ([method isEqual:@"POST"]){ [manager POST:path parameters:params success:^(NSURLSessionDataTask *task, id responseObject) { NSLog(@"POST成功:%@",responseObject); success(responseObject); } failure:^(NSURLSessionDataTask *task, NSError *error) { NSLog(@"fail POST!!%@",error); failure(error); }]; }}
你有没有注意到上面我设置了如下代码:
manager.responseSerializer = [AFJSONResponseSerializer serializer];manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/plain",@"application/json", @"text/json", @"text/javascript", @"text/html", nil];
因为AFNetworking的responseSerializer 属性只能默认只能处理特定的Content-Type,如果你想处理"text/html"等其它类型,你需要明确指定它的acceptableContentTypes。
2).多文件上传
如下,这是我写的第三方微博客户端中多图上传的实例代码:
[manager POST:@"2/statuses/upload.json" parameters:@{@"access_token": accseeToken, @"status" : encodeStatus, @"visible" : @(_intVisible), @"lat" : @(_latitude), @"long" : @(_longtitude)} constructingBodyWithBlock:^(id<AFMultipartFormData> formData) { NSMutableArray *images = [NSMutableArray arrayWithArray:weakSelf.images]; for (id asset in images) { NSData *data = nil; if ([asset isKindOfClass:[UIImage class]]) { data = UIImageJPEGRepresentation(asset, 0.4); } if ([asset isKindOfClass:ALAsset.class]) { UIImage *original = [UIImage imageWithCGImage: [[asset defaultRepresentation] fullScreenImage]]; data = UIImageJPEGRepresentation(original, 0.4); } [formData appendPartWithFileData:data name:@"pic" fileName:@"pic.jpg" mimeType:@"multipart/form-data"]; } } success:^(NSURLSessionDataTask *task, id responseObject) { NSLog(@"发送成功"); [self back]; } failure:^(NSURLSessionDataTask *task, NSError *error) { [self showFailHUD]; }];
3).多线程操作
如果你需要开启多个线程, 你需要使用AFHTTPRequestSerializer
,AFHTTPRequestOperation和NSOperationQueue
以下是AFNetworking的实例代码
NSMutableArray *mutableOperations = [NSMutableArray array];for (NSURL *fileURL in filesToUpload) { NSURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) { [formData appendPartWithFileURL:fileURL name:@"images[]" error:nil]; }]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; [mutableOperations addObject:operation];}NSArray *operations = [AFURLConnectionOperation batchOfRequestOperations:@[...] progressBlock:^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) { NSLog(@"%lu of %lu complete", numberOfFinishedOperations, totalNumberOfOperations);} completionBlock:^(NSArray *operations) { NSLog(@"All operations in batch complete");}];[[NSOperationQueue mainQueue] addOperations:operations waitUntilFinished:NO];
3).网络状态检查
网络状态检查在早期都是通过苹果官方的Reachability类进行检查,但是这个类本身存在一些问题,并且官方后来没有再更新。我们可以直接使用AFNetworking框架检测。不管使用官方提供的类还是第三方框架,用法都是类似的,通常是发送一个URL然后去检测网络状态变化,网络改变后则调用相应的网络状态改变方法。如下:
-(void)alert:(NSString *)message{ UIAlertView *alertView=[[UIAlertView alloc]initWithTitle:@"System Info" message:message delegate:nil cancelButtonTitle:@"Cancel" otherButtonTitles: nil]; [alertView show];}-(void)checkNetworkStatus{ //创建一个用于测试的url NSURL *url=[NSURL URLWithString:@"http://www.apple.com"]; AFHTTPRequestOperationManager *operationManager=[[AFHTTPRequestOperationManager alloc]initWithBaseURL:url]; //根据不同的网络状态改变去做相应处理 [operationManager.reachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) { switch (status) { case AFNetworkReachabilityStatusReachableViaWWAN: [self alert:@"2G/3G/4G Connection."]; break; case AFNetworkReachabilityStatusReachableViaWiFi: [self alert:@"WiFi Connection."]; break; case AFNetworkReachabilityStatusNotReachable: [self alert:@"Network not found."]; break; default: [self alert:@"Unknown."]; break; } }]; //开始监控 [operationManager.reachabilityManager startMonitoring];}
2.UIWebView
UIWebView不仅能加载网络资源还可以加载本地资源,目前支持的常用的文档格式如:html、pdf、docx、txt等。
UIWebView整个使用相当简单:创建URL->创建请求->加载请求,无论是加载本地文件还是Web内容都是这三个步骤。UIWebView内容加载事件同样是通过代理通知外界,常用的代理方法如开始加载、加载完成、加载出错等,这些方法通常可以帮助开发者更好的控制请求加载过程。
加载资源:
- (void)loadRequest:(NSURLRequest *)request;
常用的属性和方法:
//重新加载(刷新) - (void)reload;//停⽌止加载 - (void)stopLoading;//回退 - (void)goBack;//前进 - (void)goForward;//需要进⾏检测的数据类型 @property(nonatomic) UIDataDetectorTypes dataDetectorTypes //是否能回退 @property(nonatomic,readonly,getter=canGoBack) BOOL canGoBack;//是否能前进 @property(nonatomic,readonly,getter=canGoForward) BOOL canGoForward; //是否正在加载中 @property(nonatomic,readonly,getter=isLoading) BOOL loading;//是否伸缩内容至适应屏幕当前尺寸 @property(nonatomic) BOOL scalesPageToFit;
遵守UIWebViewDelegate协议,监听UIWebView的加载过程:
//开始发送请求(加载数据)时调用:- (void)webViewDidStartLoad:(UIWebView *)webView;//请求完毕(加载数据完毕)时调⽤:- (void)webViewDidFinishLoad:(UIWebView *)webView;//请求错误时调用:- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error;//监听UIWebView的加载过程:- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType;
下面是一个例子:
在storyBoard中拖入如下控件:
searchBar的代理方法:
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{ [self request:_searchBar.text]; [searchBar resignFirstResponder];}
加载searchBar中的请求:
-(void)request:(NSString *)urlStr{ //创建url NSURL *url; //如果file://开头的字符串则加载bundle中的文件 if([urlStr hasPrefix:kFILEPROTOCOL]){ //取得文件名 NSRange range= [urlStr rangeOfString:kFILEPROTOCOL]; NSString *fileName=[urlStr substringFromIndex:range.length]; url=[[NSBundle mainBundle] URLForResource:fileName withExtension:nil]; }else if(urlStr.length>0){ //如果是http请求则直接打开网站 if ([urlStr hasPrefix:@"http"]) { url=[NSURL URLWithString:urlStr]; }else{//如果不符合任何协议则进行搜索 urlStr=[NSString stringWithFormat:@"http://m.bing.com/search?q=%@",urlStr]; } urlStr=[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];//url编码 url=[NSURL URLWithString:urlStr]; } //创建请求 NSURLRequest *request=[NSURLRequest requestWithURL:url]; //加载请求页面 [_webView loadRequest:request];}
WebView的代理方法:
-(void)webViewDidStartLoad:(UIWebView *)webView{ //显示网络请求加载 [UIApplication sharedApplication].networkActivityIndicatorVisible=true;}-(void)webViewDidFinishLoad:(UIWebView *)webView{ //隐藏网络请求加载图标 [UIApplication sharedApplication].networkActivityIndicatorVisible=false; //设置按钮状态 [self setBarButtonStatus];}-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{ NSLog(@"error detail:%@",error.localizedDescription); UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"系统提示" message:@"网络连接发生错误!" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil]; [alert show];}
设置前进后退按钮:
-(void)setBarButtonStatus{ if (_webView.canGoBack) { _barButtonBack.enabled=YES; }else{ _barButtonBack.enabled=NO; } if(_webView.canGoForward){ _barButtonForward.enabled=YES; }else{ _barButtonForward.enabled=NO; }}
运行结果如下:
你可以在这里下载到代码。
- (void)getAccessToken:(NSString *)requestToken{ [HttpTool postWithPath:@"oauth2/access_token" params:@{ @"client_id" : kAppKey, @"client_secret" : kAppSecret, @"grant_type" : @"authorization_code", @"redirect_uri" : kRedirectURI, @"code" : requestToken } success:^(id JSON) { // 保存账号信息 Account *account = [[Account alloc] init]; account.accessToken = JSON[@"access_token"]; account.uid = JSON[@"uid"]; [[AccountTool sharedAccountTool] saveAccount:account]; // 回到主页面 ViewController *main = [[ViewController alloc]init]; if (main) { [self presentViewController:main animated:YES completion:nil]; } } failure:^(NSError *error) { }];}
- 网络2-AFNetworking和WebView
- AFNetworking 保存Cookie Session 和 Webview 共享Cookie
- 对比iOS网络组件:AFNetworking 和 ASIHTTPRequest
- 对比iOS网络组件:AFNetworking 和 ASIHTTPRequest
- AFNetworking网络请求传递字符串和字典
- iOS 网络访问框架 AFNetworking 和 NSURLSession
- iOS网络请求---AFNetWorking教程2
- 第三方库 -> 网络组件 -> AFNetworking 和 ASIHTTPRequest 的对比
- AFNetworking和JSONModel组合成 IOS 底层网络框架
- iOS开发网络数据之AFNetworking使用2.0和2.5
- iOS网络笔记--AFNetWorking发送get和post请求
- 结合AFNetworking 和 MJExtension的二次网络请求的封装
- iOS 开发 AFNetworking实现网络请求,上传和下载
- Reachability 和AFNetWorking 第三方框架对网络的监测
- 2-6.WebView网络通信
- 封装网络请求(AFNetworking)
- AFNetworking 判断当前网络
- AFnetworking监测网络变化
- Unity命令行打包
- Java不用方法抛出事务
- Lua中的select("#", ...)
- javaFX 可控制自动关闭时间的弹出提示窗口
- 判断手机环境和其他(如是否中文,应用处于前台,网络状态等等)
- 网络2-AFNetworking和WebView
- BZOJ4567 背单词
- 包含min函数的栈
- leetcode27_Remove Element
- Tips on 浮点数精度
- Java中自定义异常
- swift 开发 导航栏隐藏无效解决办法
- android数据存储方式
- leetcode-22 Generate Parentheses