分
//
// ViewController.m
// 信号量
//
// Created by Ben Lv on 2018/9/3.
// Copyright © 2018年 avatar. All rights reserved.
//
#import "ViewController.h"
#import "ATBaseRequest.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// [self text];
[selftext2];
// [self text3];
}
// 两种写法一样（text 和 text111），都是异步请求，不保证顺序
- (void)text{
// /创建信号量为0
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group, queue, ^{
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/journalismApi" param:nil success:^(id data) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"1请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"1请求失败");
}];
});
dispatch_group_async(group, queue, ^{
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinApi?type=1&page=1" param:nil success:^(id data) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"2请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"2请求失败");
}];
});
dispatch_group_notify(group, queue, ^{
// 信号量 -1 为0时wait会阻塞线程
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
NSLog(@"信号量为0");
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinCommentApi?id=27610708&page=1" param:nil success:^(id data) {
NSLog(@"3请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
}];
});
}
- (void)text111 {
// /创建信号量为0
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group, queue, ^{
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/journalismApi" param:nil success:^(id data) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"1请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"1请求失败");
}];
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinApi?type=1&page=1" param:nil success:^(id data) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"2请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
// 信号量📶+1
dispatch_semaphore_signal(semaphore);
NSLog(@"2请求失败");
}];
});
// dispatch_group_async(group, queue, ^{
//
//
//
// });
dispatch_group_notify(group, queue, ^{
// 信号量 -1 为0时wait会阻塞线程
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
NSLog(@"信号量为0");
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinCommentApi?id=27610708&page=1" param:nil success:^(id data) {
NSLog(@"3请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
}];
});
}
//主线程阻塞
- (void)text2{
NSLog(@"current1:%@",[NSThread currentThread]);
dispatch_semaphore_t semaphore =dispatch_semaphore_create(0);
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinApi?type=1&page=1" param:nil success:^(id data) {
dispatch_semaphore_signal(semaphore);
NSLog(@"2请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
dispatch_semaphore_signal(semaphore);
}];
NSLog(@"你会来这儿吗1");
NSLog(@"current1:%@",[NSThread currentThread]);
// #######阻塞了主线程
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER); //等待信号,当信号总量少于0 的时候就会一直等待 ,否则就可以正常的执行,并让信号总量-1
NSLog(@"你会来这儿吗2");
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinCommentApi?id=27610708&page=1" param:nil success:^(id data) {
NSLog(@"3请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
}];
}
- (void)text3{
dispatch_queue_t queue = dispatch_queue_create("ben", NULL);
dispatch_async(queue, ^{
NSLog(@"current1:%@",[NSThread currentThread]);
dispatch_semaphore_t semaphore =dispatch_semaphore_create(0);
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/journalismApi" param:nil success:^(id data) {
dispatch_semaphore_signal(semaphore);
NSLog(@"1请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER); //等待信号,当信号总量少于0 的时候就会一直等待 ,否则就可以正常的执行,并让信号总量-1
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinApi?type=1&page=1" param:nil success:^(id data) {
dispatch_semaphore_signal(semaphore);
NSLog(@"2请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER); //等待信号,当信号总量少于0 的时候就会一直等待 ,否则就可以正常的执行,并让信号总量-1
[ATBaseRequest getRequestWithMethod:@"https://www.apiopen.top/satinCommentApi?id=27610708&page=1" param:nil success:^(id data) {
NSLog(@"3请求成功");
}failure:^(NSIntegerresultId,NSString*errorMsg) {
}];
});
}
@end
