OC基础 使用协议

协议文件

//协议
@protocol IOSBase

-(void)knowc;
-(void)knowoc;
-(void)canDevelopiOS;




@end

@protocol IOSBaseplus
@optional//可选的
-(void)knowcpower;
@required//必须的 默认都是必须的
-(void)knowocpower;
-(void)canDevelopiOSpower;

@end

协议文件的使用

.h

#import <Foundation/Foundation.h>
#import "person.h"
#import "iosbase.h"
#import "iosAdvance.h"
NS_ASSUME_NONNULL_BEGIN

@interface IOSProgrammer : person <IOSBase,IOSBaseplus>
@property int year1;
@property int year2;
@property int num;
@property int year3;
@property int year4;
@property int num2;


@end

.m

#import "IOSProgrammer.h"

@implementation IOSProgrammer
-(void)knowc
{
    
    NSLog(@"%i年c语言开发经验",_year1);
    
}

-(void)knowoc
{
    NSLog(@"%i开发经验",_year2);
}
-(void)canDevelopiOS


{
    NSLog(@"开发过%i个小程序",_num);
}

-(void)knowcpower
{
  NSLog(@"%i年c语言高级开发经验",_year3);
    
}


@end

.main

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        NSLog(@"Hello, World!");
        IOSProgrammer* p1=[[IOSProgrammer alloc] initWithName:@"zhangsan" andAge:25 andGender:'m'];
        [p1 setYear1:1];
        [p1 setYear2:2];
        [p1 setNum:3];
        [p1 setYear3:3];
        [p1 knowcpower];
        
        
//        [p1 show];
//        [p1 knowoc];
//        [p1 knowc];
//        [p1 canDevelopiOS];

        IOSProgrammer* p2=[[IOSProgrammer alloc] initWithName:@"lisi" andAge:30 andGender:'m'];
        [p2 setYear1:2];
        [p2 setYear2:4];
        [p2 setNum:6];
        
        
        
        person* p3=[[person alloc] initWithName:@"wanger" andAge:25 andGender:'m'];
        NSArray *array=@[p1,p2,p3];
        for(id p in array)
            // 检查是否遵守协议
        {if([p conformsToProtocol:@protocol(IOSBase)])
            
            if([p year1]>1)
            {
                    
            [p show];
            [p knowoc];
            [p knowc];
                
            }
            
        }