Objective c 无法将从.Net web服务返回的Json反序列化的NSDictionary保存到Plist

我有一个.net webservice，它以以下格式返回Json数据：

        NSDictionary *json = [NSJSONSerialization JSONObjectWithData:dataPlist options:NSJSONReadingMutableContainers error:&errorJson];

[
{
    "MEMBERID": "xxx",
    "PREFIXINFORMAL": "Mr.",
    "FIRSTNAME": "xxx",
    "MIDDLENAME": "xxxx",
    "LASTNAME": "xxxx",
    "SUFFIX": xxxx
}

]

将此NSDictionary保存到plist的我的代码：

            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *path = [documentsDirectory stringByAppendingPathComponent:@"boardMemberInfo.plist"];
        NSDictionary *test = [NSDictionary dictionaryWithObject:@"test" forKey:@"test"];
        for(NSDictionary *item in json) {
            BOOL success = [item writeToFile:path atomically:YES];
            if(success) {
                NSLog(@"Success Saving New plist");
            } else {
                NSLog(@"Failure Saving New plist");
            }
        }

[item writeToFile…]和[json writeToFile…]都不起作用。但是，简单的[test writeToFile…]可以工作。我错过了什么

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谢谢，

您可以做的最好的事情是分解您的保存过程，并使用NSError了解问题所在：

    for(NSDictionary *item in json) {
        NSError *error;
        NSData *serializedData = [NSPropertyListSerialization dataWithPropertyList:item format:… options:… error:&error];
        if (!serializedData) { NSLog(@"Can't serialize data: %@", error); continue; }
        if (![serializedData writeToFile:path options:… error:&error]) {
            NSLog(@"Can't write to %@: %@", path, error);
        } else {
            NSLog(@"Success Saving New plist");
        }
    }

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查询返回空值，因此writeToFile失败。我使用decode（）sql函数不返回任何null。现在可以了。