【Objective_C】类的总结+实现简单的button点击功能

以你之姓@ 2022-12-04 08:31 163阅读 0赞

一、创建步骤  
1.打开xcode  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center]  
2.创建工程，点击commend line  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center 1]  
3.创建Cocoa文件  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center 2]  
4.弄清文件作用

.h文件：写接口，在此文件进行写属性和类方法（+），实例函数(-);  
注：省去setter和getter可以使用 @property  
() 有strong ,readwrite等类型  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center 3]  
文件示例：

//
    // Car.h
    // ClassDemo
    //
    // Created by LYF on 2020/9/5.
    // Copyright © 2020 LYF. All rights reserved.
    //
    
    #import <Foundation/Foundation.h>
    
    NS_ASSUME_NONNULL_BEGIN
    
    @interface Car : NSObject{ 
        @private
        NSString *name_;
        @private
        int age;
    }
    // 定义属性
    @property(strong) NSString *name;
    @property(readwrite) int age;// 不能使用strong，strong用于对象
    // 方法
    // 类方法 ，对象需要指针；例如(NSString *)
    +(void)sendThisDate:(NSDate *) date;
    +(void)testNum:(int) number;
    -(void)write:(NSString *)things;
    @end
    
    NS_ASSUME_NONNULL_END

.m文件：实现，实现接口的文件  
示例：

//
    // Car.m
    // ClassDemo
    //
    // Created by LYF on 2020/9/5.
    // Copyright © 2020 LYF. All rights reserved.
    //
    
    #import "Car.h"
    
    @implementation Car
    @synthesize age; // 省去setter和getter
    
    -(void) setName:(NSString *)name{ 
        name_=name;
    }
    -(NSString *)name{ 
        return name_;
    }
    
    
    // 类方法实现
    +(void)sendThisDate:(NSDate *)date{ 
        NSLog(@"今天是%@",date);
    }
    +(void)testNum:(int)number{ 
        NSLog(@"test number is %d",number);
    }
    -(void)write:(NSString *)things{ 
        NSLog(@"things are %@",things);// %@：字符串 %s 字符char %d int
    }
    @end

二、关键代码

AppDelegate.h

//
    // AppDelegate.h
    // ClassDemo
    //
    // Created by LYF on 2020/9/5.
    // Copyright © 2020 LYF. All rights reserved.
    //
    #import <Foundation/Foundation.h>
    #import <Cocoa/Cocoa.h>
    NS_ASSUME_NONNULL_BEGIN
    
    @interface AppDelegate : NSObject <NSApplicationDelegate>
        @property (assign) NSWindow *window;
    @end
    NS_ASSUME_NONNULL_END

AppDelegate.m

//
    // AppDelegate.m
    // ClassDemo
    //
    // Created by LYF on 2020/9/5.
    // Copyright © 2020 LYF. All rights reserved.
    //
    
    #import "AppDelegate.h"
    
    @implementation AppDelegate
    
    @synthesize window=_window;
    -(void)applicaitonDidFinishLauching:(NSNotification *)aNotification{ 
        NSLog(@"Mac app finished lauching");
    }
    
    -(void)changeColor{ 
        self.window.backgroundColor = [NSColor blueColor];
    }
    
    -(void)applicationDidFinishLaunching:(NSNotification *)anotification{ 
        NSLog(@"结束加载");
        NSButton *button=[NSButton new];
        
        button = [[NSButton alloc] initWithFrame:NSMakeRect(230, 200, 100, 40)];
        [button setTitle:@"change color"];
        [button setButtonType:NSMomentaryLightButton];
        [button setTarget:self];
         [button setAction:@selector(changeColor)];
        [[self.window contentView] addSubview: button];
       
        NSTextField *text=[NSTextField new];
       
        text=[[NSTextField alloc] initWithFrame:NSMakeRect(100, 100, 300, 30)];
        
        [[self.window contentView] addSubview:text];
    }
    @end

main.m

//
    // main.m
    // ClassDemo
    //
    // Created by LYF on 2020/9/5.
    // Copyright © 2020 LYF. All rights reserved.
    //
    
    #import <Foundation/Foundation.h>
    #import "Car2.h"
    #import "ClassLearn/Car.h" // 表明引入路径 默认从ClassDemo开始
    #import "ClassLearn/practice.h"
    #import "AppDelegate.h"
    
    @class Car;
    @class Car2;
    @class practice;
    int main(int argc, const char * argv[]) { 
        @autoreleasepool {      
            NSApplication *macApp = [NSApplication sharedApplication];
           
            AppDelegate *appDelegate = [[AppDelegate alloc] init];
            
            macApp.delegate = appDelegate;
            
            int style = NSClosableWindowMask | NSResizableWindowMask | NSTexturedSquareBezelStyle | NSTitledWindowMask | NSMiniaturizableWindowMask;
            
            NSWindow *appWindow = [[NSWindow alloc] initWithContentRect:NSMakeRect(50, 50, 600, 400) styleMask:style backing:NSBackingStoreBuffered defer:NO];
            appWindow.backgroundColor=[NSColor redColor];
            
            appDelegate.window = appWindow;
            
            [appWindow makeKeyAndOrderFront:appWindow];
            [macApp run];
            
        }
        return 0;
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/544e5d1a64ff41f484d292c9535c7509.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/89de00abadbf4d2fb351c7f0416c4790.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221123/ba6700cb5788406aacb3c4df2c7ef3fa.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NjU0OTc0_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221123/95155e92c9704001889adb5aad445df7.png