iOS:JSON轉OC屬性小工具

iOS:JSON轉OC屬性小工具

      在iOS開發中，只要有網絡模塊，就須要數據模型的編寫。在進行數據模型的解析和映射時，JSONModel是一個很是經常使用且優秀的第三方框架，以前有有過博客對其分析，地址以下：

JSONModel源碼分析：http://www.javashuo.com/article/p-vrnocope-bt.html。

      不管使用什麼第三方的JSON數據解析框架，咱們都須要手動來編寫數據模型類，這是一個十分機械性的體力活，本篇博客將介紹一個配合與JSONModel使用的自動生成屬性腳本(支持類的嵌套)。

      本腳本採用的語言爲JavaScript，採用JavaScript編寫有兩個好處，首先其能夠在node環境運行，能夠十分方便的操做文件，使用它能夠直接將JSON文件轉換成OC數據模型類。其次，它也十分容易在Web端運行，能夠經過網頁可視化的進行數據模型的轉換。

      閒話少說，直接上源碼：

var fileManager = require('fs');
var gettype=Object.prototype.toString;
String.prototype.firstUpperCase = function(){
    return this.replace(/\b(\w)(\w*)/g, function($0, $1, $2) {
        return $1.toUpperCase() + $2.toLowerCase();
    });
}
var arguments = process.argv.splice(2);
var path =  arguments[0];
if (!path) {
	console.log("請傳入要轉換的JSON文件路徑");
	return;
}
console.log('json文件路徑:', path);
try{
	var result = JSON.parse(fileManager.readFileSync(path));
}catch(error){
	console.log("解析JSON文件失敗:"+error);
	return;
}
if (!result) {
	console.log("解析JSON文件無效");
	return;
}
var classArray = new Array();
parseObject("MyObject",result);

var stringAll="";
//輸出
for (var i = classArray.length-1; i >=0 ; i--) {
	let cla = classArray[i];
	stringAll+="@protocol "+cla.name+" @end\r\n\r\n@interface "+cla.name+" : JSONModel\r\n\r\n";
	console.log("@protocol "+cla.name+" @end\r\n\r\n@interface "+cla.name+" : JSONModel\r\n\r\n");
	for (var j = 0; j < cla.property.length; j++) {
		stringAll+=cla.property[j]+"\r\n\r\n";
		console.log(cla.property[j]+"\r\n\r\n");
	}
	stringAll+="@end\r\n\r\n";
	console.log("@end\r\n\r\n");
}
stringAll+="===========m文件======================\r\n";
console.log("===========m文件======================\r\n");
for (var i = classArray.length-1; i >=0 ; i--) {
	let cla = classArray[i];
	stringAll+="@implementation "+cla.name+"\r\n\r\n@end\r\n\r\n";
	console.log("@implementation "+cla.name+"\r\n\r\n@end\r\n\r\n");
}
let paths = path.split("/");
paths.pop();
let newPath = paths.join("/")+"/oc.txt";
fileManager.writeFileSync(newPath,stringAll);
//核心解析函數
function parseObject(k,result){
	let c = new Class(k);
	classArray.push(c);
	for (var i = 0; i < Object.getOwnPropertyNames(result).length; i++) {
		let key = Object.getOwnPropertyNames(result)[i];
		let value = result[key];
		let type = getType(value);
		if(type==null){
			continue;
		}
		if (type=="Object") {
			//進行二次解析
			if (Object.getOwnPropertyNames(value).length==0) {
				c.property.push("@property(nonatomic,strong)NSDictionary<Optional>*"+key+";");
			}else{
				parseObject(key.firstUpperCase(),value);
				c.property.push("@property(nonatomic,strong)"+key.firstUpperCase()+"<Optional,"+key.firstUpperCase()+">*"+key+";");
			}
			continue;
		}
		if (type=="Array") {
			if (value.length>0) {
				let obj = value[0];
				let t = getType(obj);
				if (t==null) {
					continue;
				}
				if (t=="Object") {
					c.property.push("@property(nonatomic,strong)NSArray<"+key.firstUpperCase()+"*><Optional,"+key.firstUpperCase()+">*"+key+";");
					parseObject(key.firstUpperCase(),obj);
				}else{
					c.property.push("@property(nonatomic,strong)NSArray<"+t+"*><Optional>*"+key+";");
				}
			}else{
				c.property.push("@property(nonatomic,strong)NSArray<Optional>*"+key+";");
			}
			continue;
		}
		if (type=="id") {
			c.property.push("@property(nonatomic,strong)"+type+"<Optional>"+key+";");
			continue;
		}
		c.property.push("@property(nonatomic,strong)"+type+"<Optional>*"+key+";");
	}
}
//獲取要轉換的類型
function getType(obj){
	if (typeof obj == 'number') {
		return "NSNumber";
	}
	if (typeof obj == 'undefined') {
		return "id";
	}
	if (typeof obj == 'null') {
		return "id";
	}
	if (typeof obj == 'function') {
		return null;
	}
	if (typeof obj == 'string') {
		return "NSString"
	}
	if (typeof obj == 'boolean') {
		return "NSNumber"
	}
	if (typeof obj == 'object') {
		if (gettype.call(obj)=="[object Object]") {
			return "Object";
		}
		if (gettype.call(obj)=="[object Array]") {
			return "Array";
		} 
		if (gettype.call(obj)=="[object Null]"){
			return "id";
		}
	}
}
//類 
function Class(name){
	this.name = name;
	this.property = new Array();
}

在終端使用以下指令直接運行此腳本：

node Tool.js /Users/jaki/Desktop/json.json

命令後面所跟的參數爲JSON文件的路徑，JSON文件內容以下：

{
  "code": 0,
  "message": "",
  "result": {
    "aid": "be3bdab8-fbf5-4e89-97cb-56b00048b09b",
    "audios": [],
    "avatar_url": "https://www.google.com/a.jpg",
    "call_price": 0,
    "cid": "efad6549-be62-40d7-a425-40f9b7730192",
    "cover_url": "https://www.google.com/a.jpg",
    "created_on": "1528349104",
    "fields": [
      {
        "key": "name",
        "value": "Mr.Wang"
      },
      {
        "key": "company",
        "value": "TicTalk"
      },
      {
        "key": "position",
        "value": "Senior Engineer"
      }
    ],
    "geo": {
      "description": "Shanghai, China",
      "latitude": 48.82694828196076,
      "longitude": 2.367038433387592
    },
    "id": 2,
    "message_price": 0,
    "photo_sets": [],
    "pid": "9b64395f-687c-4f34-9a5d-68d9adafa4cc",
    "rid": "578ff973-c707-42b2-bfc2-87e4dc8e0efd",
    "role_open": false,
    "sid": "8f560338-dfa5-48be-b44c-65fd87798543",
    "status": 0,
    "updated_on": "1528349104",
    "video_price": 0,
    "videos": [],
    "world_open": true
  }
}

運行後，能夠看到在JSON文件同一目錄下生成了oc.txt文件，內容以下：

@protocol Geo @end

@interface Geo : JSONModel

@property(nonatomic,strong)NSString<Optional>*description;

@property(nonatomic,strong)NSNumber<Optional>*latitude;

@property(nonatomic,strong)NSNumber<Optional>*longitude;

@end

@protocol Fields @end

@interface Fields : JSONModel

@property(nonatomic,strong)NSString<Optional>*key;

@property(nonatomic,strong)NSString<Optional>*value;

@end

@protocol Result @end

@interface Result : JSONModel

@property(nonatomic,strong)NSString<Optional>*aid;

@property(nonatomic,strong)NSArray<Optional>*audios;

@property(nonatomic,strong)NSString<Optional>*avatar_url;

@property(nonatomic,strong)NSNumber<Optional>*call_price;

@property(nonatomic,strong)NSString<Optional>*cid;

@property(nonatomic,strong)NSString<Optional>*cover_url;

@property(nonatomic,strong)NSString<Optional>*created_on;

@property(nonatomic,strong)NSArray<Fields*><Optional,Fields>*fields;

@property(nonatomic,strong)Geo<Optional,Geo>*geo;

@property(nonatomic,strong)NSNumber<Optional>*id;

@property(nonatomic,strong)NSNumber<Optional>*message_price;

@property(nonatomic,strong)NSArray<Optional>*photo_sets;

@property(nonatomic,strong)NSString<Optional>*pid;

@property(nonatomic,strong)NSString<Optional>*rid;

@property(nonatomic,strong)NSNumber<Optional>*role_open;

@property(nonatomic,strong)NSString<Optional>*sid;

@property(nonatomic,strong)NSNumber<Optional>*status;

@property(nonatomic,strong)NSString<Optional>*updated_on;

@property(nonatomic,strong)NSNumber<Optional>*video_price;

@property(nonatomic,strong)NSArray<Optional>*videos;

@property(nonatomic,strong)NSNumber<Optional>*world_open;

@end

@protocol MyObject @end

@interface MyObject : JSONModel

@property(nonatomic,strong)NSNumber<Optional>*code;

@property(nonatomic,strong)NSString<Optional>*message;

@property(nonatomic,strong)Result<Optional,Result>*result;

@end

===========m文件======================
@implementation Geo

@end

@implementation Fields

@end

@implementation Result

@end

@implementation MyObject

@end

後面咱們只須要將類名調整成所須要的便可。

      下面是一個即用的網頁轉換器，採用的腳本代碼和上面的代碼基本一致：

http://zyhshao.github.io/JSONToOC.html

使用效果以下：

熱愛技術，熱愛生活中有趣的事務，互相交流，也在朋友 QQ：316045346

——琿少