AFN基本使用

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AFN

• NSURLConnection包装方法

  • GET

    // 1.创建AFN管理者// AFHTTPRequestOperationManager内部包装了NSURLConnectionAFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];// 2.利用AFN管理者发送请求NSDictionary *params = @{                         @"username" : @"520it",                         @"pwd" : @"520it"                         };[manager GET:@"http://120.25.226.186:32812/login" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {     NSLog(@"请求成功---%@", responseObject);} failure:^(AFHTTPRequestOperation *operation, NSError *error) {     NSLog(@"请求失败---%@", error);}];

  • POST

    // 1.创建AFN管理者// AFHTTPRequestOperationManager内部包装了NSURLConnectionAFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];// 2.利用AFN管理者发送请求NSDictionary *params = @{                         @"username" : @"520it",                         @"pwd" : @"520it"                         };[manager POST:@"http://120.25.226.186:32812/login" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {    NSLog(@"请求成功---%@", responseObject);} failure:^(AFHTTPRequestOperation *operation, NSError *error) {    NSLog(@"请求失败---%@", error);}];

• NSURLSession包装方法

  • GET

    // 1.创建AFN管理者AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];// 2.利用AFN管理者发送请求NSDictionary *params = @{                         @"username" : @"520it",                         @"pwd" : @"520it"                         };[manager GET:@"http://120.25.226.186:32812/login" parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {     NSLog(@"请求成功---%@", responseObject);} failure:^(NSURLSessionDataTask *task, NSError *error) {    NSLog(@"请求失败---%@", error);}];

  • POST

    // 1.创建AFN管理者AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];// 2.利用AFN管理者发送请求NSDictionary *params = @{                         @"username" : @"520it",                         @"pwd" : @"520it"                         };[manager POST:@"http://120.25.226.186:32812/login" parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {    NSLog(@"请求成功---%@", responseObject);} failure:^(NSURLSessionDataTask *task, NSError *error) {    NSLog(@"请求失败---%@", error);}];

• 文件下载

    // 1.创建AFN管理者    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];    // 2.利用AFN管理者发送请求     NSURLRequest *reuqest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_02.mp4"]];    [[manager downloadTaskWithRequest:reuqest progress:nil  destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {        // targetPath: 已经下载好的文件路径        NSLog(@"targetPath = %@", targetPath);        NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];        NSURL *documentsDirectoryPath = [NSURL fileURLWithPath:[path stringByAppendingPathComponent:response.suggestedFilename]];        // 返回需要保存文件的目标路径        return documentsDirectoryPath;    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {        NSLog(@"filePath = %@", filePath);    }] resume];

• 监听进度

/*     要跟踪进度，需要使用 NSProgress，是在 iOS 7.0 推出的，专门用来跟踪进度的类！     NSProgress只是一个对象！如何跟踪进度！-> KVO 对属性变化的监听！     @property int64_t totalUnitCount;        总单位数     @property int64_t completedUnitCount;    完成单位数     */    NSProgress *progress = nil;    // 注册通知    [progress addObserver:self forKeyPath:@"completedUnitCount" options:NSKeyValueObservingOptionNew context:nil];

    - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {    NSLog(@"%@", object);    /**     准确的获得进度     localizedDescription               10%     localizedAdditionalDescription     completed 32,768 of 318,829     fractionCompleted                  0.102776(completedUnitCount/totalUnitCount)     */    if ([object isKindOfClass:[NSProgress class]]) {        NSProgress *p = (NSProgress *)object;        NSLog(@"%@, %@, %f", p.localizedDescription, p.localizedAdditionalDescription, p.fractionCompleted);

• 文件上传

// 1.创建AFN管理者    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];    // 2.利用AFN管理者发送请求    [manager POST:@"http://120.25.226.186:32812/upload" parameters:@{@"username" : @"lnj"} constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {        NSData *data = [NSData dataWithContentsOfFile:@"/Users/NJ-Lee/Desktop/Snip20150811_1.png"];        [formData appendPartWithFileData:data name:@"file" fileName:@"lnj.png" mimeType:@"image/png"];    } success:^(NSURLSessionDataTask *task, id responseObject) {          NSLog(@"请求成功---%@", responseObject);    } failure:^(NSURLSessionDataTask *task, NSError *error) {        NSLog(@"请求失败---%@", error);    }];

[formData appendPartWithFileURL:[NSURL fileURLWithPath:@"/Users/NJ-Lee/Desktop/Snip20150811_1.png"] name:@"file" fileName:@"lnj.png" mimeType:@"image/png" error:nil];

[formData appendPartWithFileURL:[NSURL fileURLWithPath:@"/Users/NJ-Lee/Desktop/Snip20150811_1.png"] name:@"file" error:nil];

• AFN解耦

  • 自定义单利类基础Manager
  • 优点: 替换框架只需要求改单利类即可

• 序列化

  • AFN默认将服务器返回的数据当做JSON处理, 会自动解析
    
    • manager.responseSerializer = [AFJSONRequestSerializer serializer];
  • 告诉AFN，以XML形式解析服务器返回的数据
    
    • manager.responseSerializer = [AFXMLParserResponseSerializer serializer];
  • 告诉AFN, 不处理服务器返回的数据, 原样返回
    
    • manager.responseSerializer = [AFHTTPResponseSerializer serializer];

• 网络状态检测

• AFN

    // 1.创建网络监听对象    AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];    // 2.设置网络状态改变回调    [manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {        /*         AFNetworkReachabilityStatusUnknown          = -1,  // 未知         AFNetworkReachabilityStatusNotReachable     = 0,   // 无连接         AFNetworkReachabilityStatusReachableViaWWAN = 1,   // 3G 花钱         AFNetworkReachabilityStatusReachableViaWiFi = 2,   // 局域网络,不花钱         */        switch (status) {            case 0:                NSLog(@"无连接");                break;            case 1:                NSLog(@"3G 花钱");                break;            case 2:                NSLog(@"局域网络,不花钱");                break;            default:                NSLog(@"未知");                break;        }    }];    // 3.开始监听    [manager startMonitoring];

• 苹果自带

    - (void)viewDidLoad {    [super viewDidLoad];    // 注册通知    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getNetworkStatus) name:kReachabilityChangedNotification object:nil];    // 开始监听网络    self.reachability = [Reachability reachabilityForInternetConnection];    [self.reachability startNotifier];}- (void)dealloc{    [[NSNotificationCenter defaultCenter] removeObserver:self];    [self.reachability stopNotifier];}- (void)getNetworkStatus{    if ([Reachability reachabilityForLocalWiFi].currentReachabilityStatus != NotReachable) {        NSLog(@"wifi");    }else if ([Reachability reachabilityForInternetConnection].currentReachabilityStatus != NotReachable)    {        NSLog(@"手机自带网络");    }else    {        NSLog(@"没有网络");    }}