pThread多线程demo

#import "ViewController.h"

#import <pthread.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(100, 100, 100, 30);
    [btn setTitle:@"pThread" forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(clickPThread) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
}

- (void)clickPThread {
    
    NSLog(@"我在主线程中执行！！！");
    pthread_t pthread;
    pthread_create(&pthread, NULL, run, NULL);
    
}

// C语言写法
void *run(void *data) {
    
    NSLog(@"我在子线程中执行！！！");
    for (int i = 1; i < 10; i++) {
        
        NSLog(@"%d", i);
        sleep(1);
    }
    
    return NULL;
}