[多线程之四]－自定义NSThread

绝地灬酷狼 2022-08-19 01:40 112阅读 0赞

#import <UIKit/UIKit.h>
    
    @interface ViewController : UIViewController
    
    
    @end
    
    @interface myThread : NSThread
    
    -(instancetype) init;
    -(instancetype) initWithTarget:(id)target selector:(SEL)selector object:(id)argument;
    -(void)main;
    @end

#import "ViewController.h"
    
    @interface ViewController ()
    
    @end
    
    @implementation ViewController
    {
        NSThread* T;
        myThread* myT1;
        myThread* myT2;
    }
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        //注意点1:initWithTarget用的sel最多有一个参数，可以没有，有两个能编译，但运行报错。
        T = [[NSThread alloc]initWithTarget:self selector:@selector(FunOneParam:) object:@"Hello"];
        //[T start];
        myT1 = [[myThread alloc] init];
        //注意点2:默认创建不启动
        //[myT1 start];
        //注意点3:即使创建的时候指定了sel，如果有main的话，也不执行sel
        myT2 = [[myThread alloc] initWithTarget:self selector:@selector(FunOneParam:) object:@"World"];
        [myT2 start];
        //注意点4:performSelector这个方法给自定义线程不能执行，除非打开NSRunLoop
        [self performSelector:@selector(FunOneParam:) onThread:myT2 withObject:@"1111" waitUntilDone:NO];
        // Do any additional setup after loading the view, typically from a nib.
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    -(void)FunNonParam
    {
        NSLog(@"Non param!");
    }
    
    -(void)FunOneParam:(NSString*) Aparam
    {
        NSLog(@"One param,%@",Aparam);
    }
    -(void)FunTwoParam:(NSString*) Aparam1
              SecParam:(NSString*) AParam2
    {
        NSLog(@"Two Parms, %@;%@", Aparam1, AParam2);
    }
    @end
    
    @implementation myThread
    {
        NSInteger _index;
    }
    
    -(instancetype)init
    {
        if (self = [super init]) {
            _index =5;
        }
        return  self;
    }
    
    -(instancetype)initWithTarget:(id)target selector:(SEL)selector object:(id)argument
    {
        _index = 5;
        return [super initWithTarget:target selector:selector object:argument];
    }
    -(void)main
    {
        while (![self isCancelled]) {
            [NSThread sleepForTimeInterval:1];
            NSLog(@"%ld",_index);
            _index++;
        }
    }
    
    @end