ios - 重试 RACObserve 直到成功

Question

我有 RACObserve block ，我想重试调用直到它成功返回。所以它不会显示错误消息，但会重试获取。感谢您的帮助!

    [[[[RACObserve(self, currentLocation)
        ignore:nil]

       flattenMap:^(CLLocation *newLocation) {
           return [RACSignal merge:@[
                                     [self updateCurrentConditions],
                                     [self updateDailyForecast],
                                     [self updateHourlyForecast]
                                     ]];

       }] deliverOn:RACScheduler.mainThreadScheduler]

     subscribeError:^(NSError *error) {
         [TSMessage showNotificationWithTitle:@"Error"
                                     subtitle:@"There was a problem fetching the latest weather."
                                         type:TSMessageNotificationTypeError];
     }];

Answer 1

在订阅之前在调用链的最后一点使用方法retry。