ReactiveCocoa使用心得

1. 单向绑定

//model->viewmodel的model
   RAC(self.viewModel,model) = RACObserve(self, model);

在cell中对控件进行绑定，需要添加takeUntil

//注意，因为cell复用问题，所以要在每个UI控件上添加一个takeUntil:self.rac_prepareForReuseSignal
   RAC(self.viewModel.model,MobileNo) = [RACSignal merge:@[[self.phoneNumTextField.rac_textSignal takeUntil:self.rac_prepareForReuseSignal],[RACObserve(self.phoneNumTextField, text) takeUntil:self.rac_prepareForReuseSignal]]];

2. 双向绑定

RACChannelTo(self.textField, text) = RACChannelTo(self.viewModel, someProperty)

3. RACCommand

-(RACCommand *)openContactManagerCommand
{
   if (!_openContactManagerCommand) {
      _openContactManagerCommand = [[RACCommand alloc]initWithSignalBlock:^RACSignal * _Nonnull(id  _Nullable input) {
         DebugLog(@"%@",input);
         return [RACSignal createSignal:^RACDisposable * _Nullable(id<RACSubscriber>  _Nonnull subscriber) {
            [[LJContactManager sharedInstance] selectContactAtController:Context.rootNavViewController complection:^(NSString *name, NSString *phone) {
               [subscriber sendNext:phone];
               [subscriber sendCompleted];
            }];
            return nil;
         }];
      }];
   }
   return _openContactManagerCommand;
}

订阅:

[[self.viewModel.openContactManagerCommand execute:nil]subscribeNext:^(NSString*  _Nullable x) {
         self.phoneNumTextField.text = x;
      }];

4. RACSubject

-(RACSubject *)openChargeRecordHandlerSbj
{
   if (!_openChargeRecordHandlerSbj) {
      _openChargeRecordHandlerSbj = [RACSubject subject];
      @weakify(self)
      [_openChargeRecordHandlerSbj subscribeNext:^(id  _Nullable x) {
         //TODO: 打开充值记录
      }];
   }
   return _openChargeRecordHandlerSbj;
}

订阅

[self.viewModel.openChargeRecordHandlerSbj sendNext:nil];