OC development-xcode new project (22)

I. Overview

• Before the OC project used the command line to create and compile, link, run the project
• This article introduces the use of IDE tool xcode to create projects, create new class files and run projects

Two xcode to create a project

• Click in turn: Xcode ——> File ——> New ——> Project to open the project creation window

  

• In the project creation window, select the macOS tabCommand Line Tool
  

• Select or fill in the corresponding content on the options when the project is created

  Product Name:项目名字
  Organization Name(可无)
  Organization Identifier:组织标识(一般填入公司的网址)
  Bundle Identifier:无需填写，根据Organization Identifier和Product Name，自动生成
  Languge：有C，C++,Object-C和switch语言(本文选择Object-C)
  

  

• Next, choose the file storage location
  

• Click the ▶️run project in the upper left corner to view the project output
  

Three new files

• Click in turn: Xcode ——> File ——> New ——> File to open the file new dialog box
  

• In the New File dialog box, select the macOS tabCocoa Class
  

• When creating a new class, fill in the class name and go to the next step
  

• After the file is created, there are more files under the project (Person.h, Person.m)

  //文件声明 Person.h
  #import <Foundation/Foundation.h>
  NS_ASSUME_NONNULL_BEGIN
  @interface Person : NSObject
  @end
  NS_ASSUME_NONNULL_END
  //文件实现 Person.m
  #import "Person.h"
  @implementation Person
  @end
  

Four main function calls

#import <Foundation/Foundation.h>
#include "Person.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        //NSLog(@"Hello, World!");
        Person *person=[Person new];
        [person setAge:10];
        NSLog(@"年龄是%d",[person age]);
    }
    return 0;
}