关于ReactiveCocoa的实际用法

 

监听UITextView控件 text属性

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@weakify(self); [self.textViewAdvice.rac_textSignal subscribeNext:^(NSString *content){     @strongify(self);     self.textFieldPlaceholder.hidden = (content && content.length > 0); }];

　　

监听UIButton控件 UIControlEventTouchUpInside事件

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@weakify(self) [[self.buttonLogin   rac_signalForControlEvents:UIControlEventTouchUpInside]  subscribeNext:^(id x) {      @strongify(self)          [MBProgressHUD showHUDAddedTo:self.view                               animated:NO];          [self.loginVM sendLogin];  }];

　　

监听UITextField数值 赋值ViewModel

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1	RAC(self.loginVM, username) = _textFieldAccount.rac_textSignal;

 

监听ViewModel数值 赋值UILabel

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1	RAC(self.labelRoundNumber, text) = RACObserve(self.homePageVM, waitNum);

　　

自定义RACSubject消息

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@property (nonatomic, strong, readwrite) RACSubject *successLogin; @property (nonatomic, strong, readwrite) RACSubject *failureLogin;   - (void)initialize {     _successLogin = [RACSubject subject];     _failureLogin = [RACSubject subject]; }

　　

消息RACSubject传递

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- (void)sendLogin {     NSDictionary *dictParams = @{                                  @"UserName":self.username,                                  @"PassWord":self.password                                  };     @weakify(self);     [WebServiceManager requestLoginWithParams:dictParams                                      andBlock: ^(id data, id error) {                                          @strongify(self);                                          if (error) {                                              return;                                          }                                          if ([data isMemberOfClass:[UserModel class]]) {                                              [self.successLogin sendNext:userModel];                                          }                                          else {                                              [self.failureLogin sendNext:(NSString *)data];                                          }                                      }]; }

　　

消息RACSubject接收

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@weakify(self) [self.loginVM.successLogin subscribeNext:^(UserModel *userModel) {     @strongify(self);     [UserModel userModel:userModel];     [HomePageVC rootViewController];     [MBProgressHUD hideHUDForView:self.view                          animated:YES]; }];   [self.loginVM.failureLogin subscribeNext:^(NSString *data) {     @strongify(self);     self.textFieldAccount.text = @"";     self.textFieldPassword.text = @"";     kMRCError(data);     [MBProgressHUD hideHUDForView:self.view                          animated:YES]; }];

　　

监听键盘通知

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[[[NSNotificationCenter defaultCenter]   rac_addObserverForName:UIKeyboardWillShowNotification   object:nil]  subscribeNext:^(NSNotification *notification) {      NSDictionary *info = [notification userInfo];      NSValue *keyboardFrameValue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];      CGRect keyboardFrame = [keyboardFrameValue CGRectValue];      CGFloat height_temp = 195 - (kViewHeight(self.view) - keyboardFrame.size.height - 90) / 2;      [_scrollViewMaster setContentOffset:CGPointMake(0, height_temp)                                 animated:YES];  }  ];   [[[NSNotificationCenter defaultCenter]   rac_addObserverForName:UIKeyboardWillHideNotification   object:nil]  subscribeNext:^(NSNotification *notification) {      [_scrollViewMaster setContentOffset:CGPointMake(0, 0)                                 animated:YES];  }  ];   [[NSNotificationCenter defaultCenter] removeObserver:self                                                 name:UIKeyboardWillShowNotification                                               object:nil];   [[NSNotificationCenter defaultCenter] removeObserver:self                                                 name:UIKeyboardWillHideNotification                                               object:nil];