zoukankan      html  css  js  c++  java
  • Convert an object into Json using SBJson or other JSON library

    Using SBJson, to convert a object to JSON string, you have to override the proxyForJson method. Like the following,

    The .h file,

    @interface MyCustomObject : NSObject {
       
    NSString *receiverFirstName;
       
    NSString *receiverMiddleInitial;
       
    NSString *receiverLastName;
       
    NSString *receiverLastName2;
    }
    @property (nonatomic, retain) NSString *receiverFirstName;
    @property (nonatomic, retain) NSString *receiverMiddleInitial;
    @property (nonatomic, retain) NSString *receiverLastName;
    @property (nonatomic, retain) NSString *receiverLastName2;

    - (id) proxyForJson;
    - (int) parseResponse :(NSDictionary *) receivedObjects;
    }

    In the implementation file,

        - (id) proxyForJson {

           
    return [NSDictionary dictionaryWithObjectsAndKeys:
                receiverFirstName
    , @"ReceiverFirstName",
                receiverMiddleInitial
    , @"ReceiverMiddleInitial",
                receiverLastName
    , @"ReceiverLastName",
                receiverLastName2
    , @"ReceiverLastName2",
                nil
    ];
       
    }

    And to get the object from the JSON string you have to write a parseResponse method like this,

    - (int) parseResponse :(NSDictionary *) receivedObjects {
        self
    .receiverFirstName = (NSString *) [receivedObjects objectForKey:@"ReceiverFirstName"];
        self
    .receiverLastName = (NSString *) [receivedObjects objectForKey:@"ReceiverLastName"];

       
    /* middleInitial and lastname2 are not required field. So server may return null value which
         eventually JSON parser return NSNull. Which is unrecognizable by most of the UI and functions.
         So, convert it to empty string. */

       
    NSString *middleName = (NSString *) [receivedObjects objectForKey:@"ReceiverMiddleInitial"];
       
    if ((NSNull *) middleName == [NSNull null]) {
            self
    .receiverMiddleInitial = @"";
       
    } else {
            self
    .receiverMiddleInitial = middleName;
       
    }

       
    NSString *lastName2 = (NSString *) [receivedObjects objectForKey:@"ReceiverLastName2"];
       
    if ((NSNull *) lastName2 == [NSNull null]) {
            self
    .receiverLastName2 = @"";
       
    } else {
            self
    .receiverLastName2 = lastName2;
       
    }

       
    return 0;
    }
  • 相关阅读:
    游标
    浅析数据准备区中的数据结构
    浅析代理键替换管道
    浅析何时进行概况分析
    浅析Staging
    XHTML教程——表单
    XHTML教程——文字格式与特殊字符
    XHTML教程——列表
    XHTML教程——标签
    CSS入门教程——CSS简介
  • 原文地址:https://www.cnblogs.com/neozhu/p/2431890.html
Copyright © 2011-2022 走看看