l[20]ve：无效的块类型？

Question

我不知道为什么我会收到此错误。我还从以下代码中收到 EXC_BAD_ACCESS 问题。有什么想法吗？

在 didRecieveResponse 和 didRecieveData 以及 didFinishLoading 上运行断点显示前两个已运行，并且在接收数据的过程中程序崩溃了。

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    // starts... :)
    plistContentsData = [NSMutableData data]; //NSMutableData - inst in head

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [plistContentsData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    mellowListings = [[NSArray alloc] initWithData:plistContentsData]; //NSArray - inst in head

    NSLog(@"%@",mellowListings);

    CLLocationCoordinate2D newLocation;

    int counter = 0;

    for(NSDictionary *tempDict in mellowListings){
        NSLog(@"%f",([[tempDict objectForKey:@"lat"] floatValue]));
        NSLog(@"%f",([[tempDict objectForKey:@"long"] floatValue]));
        newLocation.latitude = ([[tempDict objectForKey:@"lat"] floatValue]);
        newLocation.longitude = ([[tempDict objectForKey:@"long"] floatValue]);
        TCPlaceMarker *placemark = [[TCPlaceMarker alloc] initWithCoordinate:newLocation];
        placemark.title = [tempDict objectForKey:@"name"];
        placemark.subtitle = [tempDict objectForKey:@"address1"];
        placemark.source = [[tempDict objectForKey:@"source"] lowercaseString];
        placemark.tag = counter;
        [mapView addAnnotation:placemark];
        counter++;
    }
}

Answer 1

plistContentsData = [NSMutableData data];

您创建了一个自动释放的 NSMutableData 对象，它可能在您退出 didReceiveResponse 方法后立即变得无效。您需要保留 plistContentsData 来修复该错误。