重试 RACObserve，直到成功

Question

我有 RACObserve 块，我想重试调用，直到它成功返回。因此，它不会显示错误消息，但会重试提取。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

在订阅前调用链的最后一点使用retry的方法。