Ios 如何使用Objective C将JSON解析数据存储到Plist中？

我需要使用

objective C

将

JSON

解析的数据存储到

propertylist

中，就像下面的结构一样

来自服务器的我的JSON响应：

{ 
   "response":{ 
      "A":{ 
         "name":"Arun",
         "age":"20",
         "city":"SFO",
         "subject":2
      },
      "B":{ 
         "name":"Benny",
         "age":"20",
         "city":"SFO",
         "subject":1
    },
      "C":{ 
         "name":"Nani",
         "age":"30",
         "city":"SFO",
         "subject":0
      }
   },
   "inprogressdata":{ 
   },
   "dataspeed":"112 milliseconds..."
}

我正在尝试将下面的存储方法放入

propertylist

。将其调用的JSON响应

A、B、C

值放入数组，并将该项作为字典

注意：

根据JSON响应，

A、B、C

值将增加，我的意思是它不是静态的，它可能会上升到Z

在这个

数组中

值首先是每个值都应该存储为

字典

。在该字典中，需要添加如下所示的字符串值，如果主题计数高于0，则应基于该计数创建如下图所示的字典数组

例如：

-Root 
|
|-----Objects [Array Value]
       |
       |------Item 0(A) [Dictionary Value]   
       |
       |------name (String)
       |------age (String)
       |------city (String)
       |------subject (Number)     // If number 2 then need to create "Objects_Subjectcount" [Array Values]
       |------Objects_Subjectcount (Array)
             |
             |------Item 0 [Dictionary Value]
             |------Item 1 [Dictionary Value]    

试试这个代码

NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
NSDictionary *response = JSON[@"response"];
NSArray *objects = [response allValues];
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = paths.firstObject;
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"File.plist"];
NSError *writeError = nil;
NSData *plistData = [NSPropertyListSerialization dataWithPropertyList:objects format:NSPropertyListXMLFormat_v1_0 options:NSPropertyListImmutable error:&writeError];
if(plistData){
    [plistData writeToFile:plistPath atomically:YES];
}
else {
    NSLog(@"Error in saveData: %@", error);
}

如果我对你问题第二部分的理解是正确的，代码将是这样的

NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves | NSJSONReadingMutableContainers error:&error];
 NSDictionary *response = JSON[@"response"];
 NSArray *keys = [response allKeys];

 NSMutableArray *objects = [NSMutableArray new];
 for (NSString *key in keys) {
     NSMutableDictionary *object = response[key];
     NSPredicate *predicate = [NSPredicate predicateWithFormat:@"subject = %@",object[@"subject"]];
     NSArray *objectsWithSameSubject = [objects filteredArrayUsingPredicate:predicate];
     NSInteger subjects = [object[@"subject"] integerValue];
     if (subjects > 0) {

         NSMutableArray *Objects_Subjectcount = [NSMutableArray new];
         [object setObject:Objects_Subjectcount forKey:@"Objects_Subjectcount"];
         for (NSInteger i = 0; i < subjects; i++) {
             [Objects_Subjectcount addObject:object];// object or anything you need

         }
     }
     [objects addObject:object];
 }

 NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsPath = paths.firstObject;
 NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"File.plist"];
 NSError *writeError = nil;
 NSDictionary *finalDict = @{@"Objects": objects};
 NSData *plistData = [NSPropertyListSerialization dataWithPropertyList:finalDict format:NSPropertyListXMLFormat_v1_0 options:NSPropertyListImmutable error:&writeError];
 if(plistData){
     [plistData writeToFile:plistPath atomically:YES];
 }
 else {
     NSLog(@"Error in saveData: %@", error);
 }

---

请阅读这篇文章，以获取您的答案。这没有帮助，因为我已经完成了plist创建和存储retiveal过程。我需要像上面的structure ex:dictionary数组那样存储数据，然后根据信号计数再次创建dictionary nexted表单数组@iOS Learner查看以下链接：和。阅读这些内容，并根据需要编写代码到plist中。@Nikhil84这一切都是关于plist的，这不重要。我需要如何存储数据像上面的结构！我很好奇为什么需要使用

NSPropertyListSerialization

，而不是直接在

plistDict

上调用

-writeToFile:atomicaly:

。然后我发现这篇文章解释了

NSPropertyListSerialization

的优点：这是一个很好的答案，顺便问一下，我如何查看存储的数据？这将在plistPath中。如果您在模拟器中运行，请打印（nslog）plistPath，并在finder中按shift+cmd+G，然后通过此路径并返回！它可以自动存储所有东西！哇，太棒了@JohnyKutty！顺便说一句，我问了另一个基于主题计数的问题需要添加嵌套的字典项数组@johnykuttyy你的意思是如果dict中有更多的项目具有相同的主题，那么它不应该添加到根目录中，而应该添加到同一个字典中，并使用键对象\u Subjectcount？

NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves | NSJSONReadingMutableContainers error:&error];
 NSDictionary *response = JSON[@"response"];
 NSArray *keys = [response allKeys];

 NSMutableArray *objects = [NSMutableArray new];
 for (NSString *key in keys) {
     NSMutableDictionary *object = response[key];
     NSPredicate *predicate = [NSPredicate predicateWithFormat:@"subject = %@",object[@"subject"]];
     NSArray *objectsWithSameSubject = [objects filteredArrayUsingPredicate:predicate];
     NSInteger subjects = [object[@"subject"] integerValue];
     if (subjects > 0) {

         NSMutableArray *Objects_Subjectcount = [NSMutableArray new];
         [object setObject:Objects_Subjectcount forKey:@"Objects_Subjectcount"];
         for (NSInteger i = 0; i < subjects; i++) {
             [Objects_Subjectcount addObject:object];// object or anything you need

         }
     }
     [objects addObject:object];
 }

 NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsPath = paths.firstObject;
 NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"File.plist"];
 NSError *writeError = nil;
 NSDictionary *finalDict = @{@"Objects": objects};
 NSData *plistData = [NSPropertyListSerialization dataWithPropertyList:finalDict format:NSPropertyListXMLFormat_v1_0 options:NSPropertyListImmutable error:&writeError];
 if(plistData){
     [plistData writeToFile:plistPath atomically:YES];
 }
 else {
     NSLog(@"Error in saveData: %@", error);
 }

1. Create JSON with mutable containers and leaves.
2. Iterate through all keys and values.
3. Check whether the subject value of object is greater than 0 in the existing subjects array? if yes add the object to
Objects_Subjectcount. Add the object to objects array.(Don't forget
to set an NSMutable array with key Objects_Subjectcount) to the
object. 4 . Make final dictionary to be written as plist - wrap the
objets array in a dictionary with key "objects"
5. Convert the dictionary to plist data and write it