Question

我有一个数组，我想将该数组拆分为3个部分或3个数组。

第一个数组包含 - ＆gt; AppName的
第二个数组包含 - ＆gt;说明
第3个数组包含 - ＆gt;图标

这是我要拆分的json数组，

Deviceinfo =   (
                {
            Appname = App;
            Description = "This is test app";
            Icon = "57.png";
        }
    );
}

这是我的代码，

NSMutableArray *firstArray = [NSMutableArray array];
NSMutableArray *secondArray = [NSMutableArray array];
NSMutableArray *thirdArray = [NSMutableArray array];

for (int i = 0; i < [json count]; i++) {
    NSArray *tempArray = [[json objectAtIndex:i]componentsSeparatedByString:@""];
    [firstArray addObject:[tempArray objectAtIndex:0]];
    [secondArray addObject:[tempArray objectAtIndex:1]];
    if ([tempArray count] == 3)
    {
        [thirdArray addObject:[tempArray objectAtIndex:2]];
    }
}
NSLog(@"yourArray: %@\nfirst: %@\nsecond: %@\nthird: %@", json, firstArray, secondArray, thirdArray);

我在此行的代码中发现了崩溃，

NSArray *tempArray = [[json objectAtIndex:i]componentsSeparatedByString:@""];

我不明白这里出了什么问题。有没有解决这个问题的指针？

Answer 1

我认为您可以使用以下代码我希望这对您有所帮助： -

NSMutableArray *firstArray = [NSMutableArray array];
NSMutableArray *secondArray = [NSMutableArray array];
NSMutableArray *thirdArray = [NSMutableArray array];

NSDictionary *jsonArray = [NSJSONSerialization JSONObjectWithData: jsonResponse options: NSJSONReadingMutableContainers error: &e]; 

 //here is first i load with Dicutionary bcz if into your Json you have may be multiple Dictuionary so you then you can load purticular dictionary as bellow line

修改

NSArray * responseArr = jsonArray[@"Deviceinfo"]; firstArray = [responseArr valueForKey:@"Appname"]; secondArray = [responseArr valueForKey:@"Description"]; thirdArray = [responseArr valueForKey:@"Icon"];

如果您的Json中有多个Deviceinfo字典，那么您可以使用For循环

// NSArray * responseArr = jsonArray[@"Deviceinfo"]; // for (NSDictionary *dict in responseArr) { // [firstArray addObject:[dict valueForKey:@"Appname"]; // [secondArray addObject:[dict valueForKey:@"Description"]; // [thirdArray addObject:[dict valueForKey:@"Icon"]; // }

Answer 2

NSMutableArray *firstArray = [[NSMutableArray alloc]init];
NSMutableArray *secondArray = [[NSMutableArray alloc]init];
NSMutableArray *thirdArray = [[NSMutableArray alloc]init];

NSDictionary *list =[NSJSONSerialization JSONObjectWithData:data
                                                                options:kNilOptions error:&error];

 NSArray * tempArray = jsonArray[@"Deviceinfo"];
for (NSDictionary *list in tempArray)
{
  [firstArray addObject:[list objectForKey:@"Appname"];
   [secondArray addObject:[list objectForKey:@"Description"];
   [thirdArray addObject:[list objectForKey:@"Icon"];
 }

然后尝试

NSLog(@"yourArray: %@\nfirst: %@\nsecond: %@\nthird: %@", tempArray, firstArray, secondArray, thirdArray);

Answer 3

NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://url.to.your.json"]];

NSArray *jsonObjects = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil];

NSMutableArray *appNameArray = [NSMutableArray array];
NSMutableArray *discriptionArray = [NSMutableArray array];
NSMutableArray *iconArray = [NSMutableArray array];

for(NSDictionary *dictionary in jsonObjects)
{
     [appNameArray adddObject:[dictionary valueForKey:@"Appname"];
     [appNameArray adddObject:[dictionary valueForKey:@"Description"];
     [appNameArray adddObject:[dictionary valueForKey:@"Icon"];
}

将数组拆分为三个独立的数组

3 个答案: