IOS中的swift和oc關于對象模型的description方法重寫

先講OC的，oc比較重要，放在最前面.
首先創建一個cocoa Touch Class，繼承NSObject, 命名Person
點h文件寫幾個屬性
#import <Foundation/Foundation.h>
@interface AHLJPerson : NSObject
@property(nonatomic,copy)NSString * name;
@property(nonatomic,assign)int age;
@property(nonatomic,assign)double height;
@end

重寫description方法

• -(NSString *)description
  {
  return [NSString stringWithFormat:@"<%p %@,{name: %@,age: %d,height: %f}>",self, [self class],self.name,self.age,self.height ];
  }
  書寫的格式較多，我認為這種格式較規范，描述的也清楚.
  重寫觸摸屏幕事件
• -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
  AHLJPerson *p1 = [[AHLJPerson alloc] init];
  p1.name = @“jack”;
  p1.age = 18;
  p1.height = 178;
  AHLJPerson *p2 = [[AHLJPerson alloc] init];
  p2.name = @“rose”;
  p2.age = 19;
  p2.height = 160;
  NSLog(@"%@",p1);
  NSLog(@"%@",p2);
  }
  控制臺打印內容

2021-10-18 13:29:55.553929+0800 decriptionTest[9278:202074] <0x600002a757c0 AHLJPerson,{name: jack,age: 18,height: 178.000000}> 2021-10-18 13:29:55.554015+0800 decriptionTest[9278:202074] <0x600002a757e0 AHLJPerson,{name: rose,age: 19,height: 160.000000}>

swift的description方法;

import UIKit class UserAccount: NSObject {@objc var access_token: String?@objc var expires_in: TimeInterval = 0@objc var uid: String?init(dict: [String: NSObject]){super.init()//KVCself.setValuesForKeys(dict)}init(dict: [String: Any],title: String){super.init()//KVCself.setValuesForKeys(dict)}override var description: String{let keys = ["access_token","expires_in","uid"]//數組return dictionaryWithValues(forKeys: keys).description} }

測試主要代碼,自己寫一個函數去調用一下

let dictTest1: [String: Any] = ["access_token": "2.00tIZE123we455489c55clskLbD", "expires_in": "157679999", "uid": "5335345699"] let account1 = UserAccount(dict: dictTest1, title: "") debugPrint(account1)

日志:

["access_token": 2.11tI789pF0l1kIyhfdsf1c55clskLbD, "expires_in": 15764579999, "uid": 5564567845699]

順帶把java的也說一下，
java一般重寫toString方法，alt + insert鍵 可以重寫，蘋果電腦idea的快捷鍵是cmd + N，為了返璞歸真，我這里沒有使用Lombok,而是使用原生的方法

package com.example.demo.pojo; public class Person {private String name;private int age;private double height;public Person(){}public Person(String name, int age, double height) {this.name = name;this.age = age;this.height = height;}@Overridepublic String toString() {return "Person{" +"name='" + name + '\'' +", age=" + age +", height=" + height +'}';} }

我用junit測試的,也可以使用靜態的main方法測試

@Testvoid contextLoads() {Person p1 = new Person("jack",18,178);Person p2 = new Person("rose",17,178);System.out.println(p1);System.out.println(p2);System.out.println(p1.getClass());System.out.println(p1.hashCode());System.out.println(p2.hashCode());}

日志:

Person{name='jack', age=18, height=178.0} Person{name='rose', age=17, height=178.0} class com.example.demo.pojo.Person 33558975 1373220972 創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

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