我对Json在iOs中收到的响应有疑问。
我不知道是否是因为有很多有关WebService的信息,但是Json的响应不是很好。我收到一个答案,但是当我使用变量NSMutableData * d检查数据的字符串时,它并不完整,并且在* response中,它无法使用JSONObjectWithData进行初始化。

    NSLog(@"Request: %@", bytes);

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]  initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10.0];
    NSData *requestData = [NSData dataWithBytes:[bytes UTF8String] length:[bytes length]];

    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody: requestData];

    [NSURLConnection connectionWithRequest:request delegate:self];


答案是:

- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSMutableData *d = [NSMutableData data];
    [d appendData:data];
    NSString *a = [[NSString alloc] initWithData:d encoding:NSASCIIStringEncoding];
    NSError *error;
    NSDictionary *response = [NSJSONSerialization JSONObjectWithData:d options:kNilOptions error:&error];
}

最佳答案

每当接收到大量数据时,就会调用connection:didReceiveData:委托方法。无法保证您会在第一个电话中收到完整的回复。

正确的方法是收集connection:didReceiveData:中的数据,然后在connectionDidFinishLoading:中进行处理

您的代码应如下所示:

...
self.receivedData = [NSMutableData data];
...

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [self.receivedData appendData:data]
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSError *error;
    NSDictionary *response = [NSJSONSerialization JSONObjectWithData:self.receivedData options:kNilOptions error:&error];
}

关于ios - iOS中来自JSON的响应不完整,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/33919085/

10-13 02:04
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