在 connectionDidFinishLoading:, NSURLConnection 委托方法中发布后无法收到通知 [英] can't receive a notification after posting inside connectionDidFinishLoading:, NSURLConnection delegate method

问题描述

我无法收到通知:

一个用于做 NSURLConnection 异步操作的类

a class for doing NSURLConnection async stuff

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

    NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:_receivedData, @"receivedData", nil];
    [[NSNotificationCenter defaultCenter] postNotificationName:kWebServiceURLTemperaturaMaximaKMLNotitificationName object:self userInfo:userInfo];

}

另一个观察通知的类:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceivedCompleteData:) name:kWebServiceURLTemperaturaMaximaKMLNotitificationName object:self];

有什么想法吗?

推荐答案

错误在这里:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceivedCompleteData:) name:kWebServiceURLTemperaturaMaximaKMLNotitificationName object:self];

这意味着通知中心会将名为name:kWebServiceURLTemperaturaMaximaKMLNotitificationName的通知发送给同样由self生成的self.您应该将 object:self 替换为 object:nil(接收任何名为 name:kWebServiceURLTemperaturaMaximaKMLNotitificationName 的通知)或实际发送通知的对象.

This means that notification center will send notification named name:kWebServiceURLTemperaturaMaximaKMLNotitificationName to self that is also generated by self. You should replace object:self with object:nil (to receive any notification named name:kWebServiceURLTemperaturaMaximaKMLNotitificationName) or with object that is actually sending the notification.

这篇关于在 connectionDidFinishLoading:, NSURLConnection 委托方法中发布后无法收到通知的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！