NSArray 返回字符串而不是字典 [英] NSArray Returning String Instead of Dictionary

问题描述

我已经设置了日志并检查了代码，并且 NSArray 作为字符串而不是字典返回.问题是我不确定如何将这个特定的字符串转换成字典，而且我的时间很紧.

代码如下:

NSArray* placeJson = [NSJSONSerialization JSONObjectWithData:jsonResponse options:kNilOptions error:nil];for (NSDictionary *placeJsons in placeJson) {NSLog(@"%@",NSStringFromClass([placeJsons class]));page = placeJsons[@"page"];NSLog(@"%d",page);如果(页面> 0){NSDictionary* pJson = placeJsons[@"data"];for (NSDictionary *dict in pJson) {

NSlog 的日志和结果错误:

2013-09-12 19:50:55.117 GetDeal[1584:c07] __NSCFString2013-09-12 19:50:55.118 GetDeal[1584:c07] -[__NSCFString objectForKeyedSubscript:]:无法识别的选择器发送到实例 0xac5f8902013-09-12 19:50:55.119 GetDeal[1584:c07] *** 由于未捕获的异常NSInvalidArgumentException"而终止应用程序，原因:-[__NSCFString objectForKeyedSubscript:]:无法识别的选择器发送到实例 0xac5f890"

此代码也可能有用.

NSLog(@"AES:%@",aesResponse);NSData* jsonResponse = [aesResponse dataUsingEncoding:NSUTF8StringEncoding];NSArray* placeJson = [NSJSONSerialization JSONObjectWithData:jsonResponse options:kNilOptions error:nil];

对不起.JSON 数据:

http://mobapps.getdeal.me/getcoupons.php?category=art

可能的超级解决方案:

NSArray* placeJson = [NSJSONSerialization JSONObjectWithData:jsonResponse options:kNilOptions error:nil];NSDictionary *placeJsons = [NSJSONSerialization JSONObjectWithData:[placeJson dataUsingEncoding:NSUTF8StringEncoding]

错误信息.

NSArray"没有可见的@interface 声明了选择器dataUsingEncoding:"

非常抱歉……但大约 30 分钟后，我的生活将发生巨大变化.

回答马丁:

NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];NSString *postLength = [NSString stringWithFormat:@"%d", [帖子长度]];**NSURL *url = [NSURL URLWithString:placeLink];**NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];[请求 setHTTPMethod:@"POST"];

配置文件

#define placeLink @"http://mobapps.getdeal.me/getcoupons3.php"

解决方案

我会尝试一下.正如我在评论中所说，您的提供商发送嵌套 JSON":

NSURL *url = [NSURL URLWithString:@"http://mobapps.getdeal.me/getcoupons.php?category=art"];NSData *jsonResponse = [NSData dataWithContentsOfURL:url];NSLog(@"%@", [[NSString alloc] initWithData:jsonResponse encoding:NSUTF8StringEncoding]);

输出:

<前>"{\"data\":[[{\"PID\":\"90205\",\"PName\":null, ... ,\"page\":\"1\"}"

这是再次编码为 JSON 字符串的 JSON 数据.第一个任务是删除外层 JSON 编码:

NSError *error;NSString *outerJson = [NSJSONSerializationJSONObjectWithData:jsonResponse选项:NSJSONReadingAllowFragments 错误:&error];NSLog(@"%@",outerJson);

输出:

<前>{"data":[[{"PID":"90205","PName":null, ... ,"page":"1"}

现在我们有了正确的 JSON 数据，可以反序列化:

NSDictionary *innerJson = [NSJSONSerializationJSONObjectWithData:[outerJson dataUsingEncoding:NSUTF8StringEncoding]选项:0 错误:&error];NSLog(@"%@",innerJson);

输出:

<前>{数据 = (({PAddr = "在收尾部分选择艺术品可节省 20-85%.只需点击链接，然后点击页面底部的收尾绘画\".无需代码，价格如标记.";PCity = "";...率 = 20;骚 = 20;};});页 = 1;}

I've setup logs and checked the code and NSArray is being returned as a string instead of a dictionary. The problem is that I'm not sure how I can convert this particular string into a dictionary and I'm running on a tight timeframe.

Here's the code:

NSArray* placeJson = [NSJSONSerialization JSONObjectWithData:jsonResponse options:kNilOptions error:nil];
        for (NSDictionary *placeJsons in placeJson) {

            NSLog(@"%@",NSStringFromClass([placeJsons class]));
            page = placeJsons[@"page"];        
            NSLog(@"%d",page);
        if (page > 0) {
            NSDictionary* pJson = placeJsons[@"data"];
            for (NSDictionary *dict in pJson) {

Error in Logs and results of NSlog:

2013-09-12 19:50:55.117 GetDeal[1584:c07] __NSCFString
2013-09-12 19:50:55.118 GetDeal[1584:c07] -[__NSCFString objectForKeyedSubscript:]: unrecognized selector sent to instance 0xac5f890
2013-09-12 19:50:55.119 GetDeal[1584:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString objectForKeyedSubscript:]: unrecognized selector sent to instance 0xac5f890'

This code may be useful as well.

NSLog(@"AES:%@",aesResponse);
        NSData* jsonResponse = [aesResponse dataUsingEncoding:NSUTF8StringEncoding];



        NSArray* placeJson = [NSJSONSerialization JSONObjectWithData:jsonResponse options:kNilOptions error:nil];

Sorry. The JSON data:

http://mobapps.getdeal.me/getcoupons.php?category=art

Possible supe solution:

NSArray* placeJson = [NSJSONSerialization JSONObjectWithData:jsonResponse options:kNilOptions error:nil];
        NSDictionary *placeJsons = [NSJSONSerialization JSONObjectWithData:[placeJson dataUsingEncoding:NSUTF8StringEncoding]

Error Message.

No visible @interface for 'NSArray' declares the selector 'dataUsingEncoding:'

Definitely sorry... but in about 30 minutes my life is going to change dramatically.

Answer to Martin:

NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];
        NSString *postLength = [NSString stringWithFormat:@"%d", [post length]];
        **NSURL *url = [NSURL URLWithString:placeLink];**
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
        [request setHTTPMethod:@"POST"];

Config.h

#define placeLink @"http://mobapps.getdeal.me/getcoupons3.php"

解决方案

I will give it a try. As I said in a comment, your provider sends "nested JSON":

NSURL *url = [NSURL URLWithString:@"http://mobapps.getdeal.me/getcoupons.php?category=art"];
NSData *jsonResponse = [NSData dataWithContentsOfURL:url];
NSLog(@"%@", [[NSString alloc] initWithData:jsonResponse encoding:NSUTF8StringEncoding]);

Output:

"{\"data\":[[{\"PID\":\"90205\",\"PName\":null, ... ,\"page\":\"1\"}"

This is JSON data once more encoded as a JSON string. The first task is to remove the outer JSON encoding:

NSError *error;
NSString *outerJson = [NSJSONSerialization
               JSONObjectWithData:jsonResponse
               options:NSJSONReadingAllowFragments error:&error];
NSLog(@"%@", outerJson);

Output:

{"data":[[{"PID":"90205","PName":null, ... ,"page":"1"}

So now we have proper JSON data, which can be de-serialized:

NSDictionary *innerJson = [NSJSONSerialization
               JSONObjectWithData:[outerJson dataUsingEncoding:NSUTF8StringEncoding]
               options:0 error:&error];
NSLog(@"%@", innerJson);

Output:

{
    data =     (
                (
                        {
                PAddr = "Save 20-85% on select artwork in the closeout section. Just click the link, then click \"paintings on closeout\" toward the bottom of the page. No code necessary, prices are as marked.";
                PCity = "";

                ...

                rate = 20;
                sao = 20;
            };
        }
    );
    page = 1;
}

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