// ViewController.m
// UsedGCD
//
// Created by jinxin on 16/8/1.
// Copyright © 2016年 zhaixingzhi. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self mainSync];;
}
/**
* 主队列 + 异步任务 : 没有开启新线程，任务还是逐个完成的
*/
-(void)mainAsync
{
dispatch_queue_t queue = dispatch_get_main_queue();
dispatch_async(queue, ^{
for (int
i = 0; i< 6; i++) {
NSLog(@"1----%@",[NSThread currentThread]);
}
});
dispatch_async(queue, ^{
for (int i = 0; i< 6; i++) {
NSLog(@"2----%@",[NSThread currentThread]);
}
});
dispatch_async(queue, ^{
for (int i = 0; i< 6; i++) {
NSLog(@"3----%@",[NSThread currentThread]);
}
});
}
/**
* 主队列 + 同步任务：会造成死锁的进程 【切记】：不能字啊主队列中添加同步任务
*/
-(void)mainSync
{
NSLog(@"---1");
dispatch_queue_t queue = dispatch_get_main_queue();
dispatch_sync(queue, ^{
NSLog(@"不会打印");
});
NSLog(@"---2");
}
/**
* 串行队列 +异步任务,开启了新的线程，任务是逐个完成的
*/
-(void)serialAsync
{
dispatch_queue_t queue = dispatch_queue_create("queue", NULL);
dispatch_async(queue, ^{
for (int
i = 0; i< 6; i++) {
NSLog(@"1----%@",[NSThread currentThread]);
}
});
dispatch_async(queue, ^{
for (int i = 0; i< 6; i++) {
NSLog(@"2----%@",[NSThread currentThread]);
}
});
dispatch_async(queue, ^{
for (int i = 0; i< 6; i++) {
NSLog(@"3----%@",[NSThread currentThread]);
}
});
}
/**
* 串行队列 + 同步任务:没有开启新的线程，任务是逐个完成
*/
-(void)serialSync
{
//创建串行队列
dispatch_queue_t queue = dispatch_queue_create("queue", DISPATCH_QUEUE_SERIAL);//这里可以用DISPATCH_QUEUE_SERIAL或者NULL都是串行队列
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-1--%@",[NSThread currentThread]);
}
});
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-2--%@",[NSThread currentThread]);
}
});
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-3--%@",[NSThread currentThread]);
}
});
}
/**
* 全局队列 + 异步任务 ： 开启新的线程，任务是并发的
*/
-(void)globalAsync
{
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-1--%@",[NSThread currentThread]);
}
});
dispatch_async(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-2--%@",[NSThread currentThread]);
}
});
dispatch_async(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-3--%@",[NSThread currentThread]);
}
});
}
/**
* 全局队列 + 同步任务 ： 没有开启新线程 ，任务是逐个完成的
*/
-(void)globalSync
{
//获得全局队列
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-1--%@",[NSThread currentThread]);
}
});
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-2--%@",[NSThread currentThread]);
}
});
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-3--%@",[NSThread currentThread]);
}
});
}
/**
* 并发队列 + 异步任务 : 开启了新线程，任务是并发的
*
*/
-(void)concurrentAsunc
{
//创建并发队列
dispatch_queue_t queue = dispatch_queue_create("myQueue", DISPATCH_QUEUE_CONCURRENT);
//异步任务
dispatch_async(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-1--%@",[NSThread currentThread]);
}
});
//异步任务
dispatch_async(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-2--%@",[NSThread currentThread]);
}
});
//异步任务
dispatch_async(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-3--%@",[NSThread currentThread]);
}
});
}
/**
* 并发队列 + 同步任务 ： 没有开启新的线程，任务逐个进行
*/
-(void)concurrentSync
{
//创建并行队列
dispatch_queue_t queue = dispatch_queue_create("myQueue", DISPATCH_QUEUE_CONCURRENT);
//在对垒中创建任务
//同步任务
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-1--%@",[NSThread currentThread]);
}
});
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-2--%@",[NSThread currentThread]);
}
});
dispatch_sync(queue, ^{
for (int i = 0; i < 5; i++) {
NSLog(@"-3--%@",[NSThread currentThread]);
}
});
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end