前言
目的:A、B同时执行，拿到A、B的执行结果再实行C
方式一
NSString *hUrl = @"http://dspceshi.yunbaozb.com/api/public/index.php?service=Video.getVideo&uid=13629&videoid=230&mobileid=123aaa";
NSLog(@"start");
dispatch_group_t group = dispatch_group_create();
dispatch_queue_t queue = dispatch_get_global_queue(0, 0);
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
dispatch_group_async(group, queue, ^{
sleep(5);
NSLog(@"同步任务A");
[YBNetworking postWithUrl:hUrl Dic:nil Suc:^(NSDictionary *data, NSString *code, NSString *msg) {
dispatch_semaphore_signal(semaphore);
NSLog(@"net1end===%@",[NSThread currentThread]);
} Fail:^(id fail) {
// sleep(5);
dispatch_semaphore_signal(semaphore);
NSLog(@"net1fail===%@",[NSThread currentThread]);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
});
dispatch_group_async(group, queue, ^{
sleep(2);
NSLog(@"同步任务B");
[YBNetworking postWithUrl:hUrl Dic:nil Suc:^(NSDictionary *data, NSString *code, NSString *msg) {
dispatch_semaphore_signal(semaphore);
NSLog(@"net2end===%@",[NSThread currentThread]);
} Fail:^(id fail) {
// sleep(10);
dispatch_semaphore_signal(semaphore);
NSLog(@"net2fail===%@",[NSThread currentThread]);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
});
// dispatch_group_async(group, queue, ^{
// sleep(10);
// NSLog(@"同步任务C");
// });
dispatch_group_notify(group, queue, ^{
NSLog(@"任务完成执行");
});
方式二
NSString *hUrl = @"http://dspceshi.yunbaozb.com/api/public/index.php?service=Video.getVideo&uid=13629&videoid=230&mobileid=123aaa";
NSLog(@"start");
dispatch_group_t group = dispatch_group_create();
dispatch_queue_t queue = dispatch_get_global_queue(0, 0);
dispatch_group_enter(group);
dispatch_group_async(group, queue, ^{
sleep(5);
NSLog(@"同步任务A");
[YBNetworking postWithUrl:hUrl Dic:nil Suc:^(NSDictionary *data, NSString *code, NSString *msg) {
dispatch_group_leave(group);
NSLog(@"net1end===%@",[NSThread currentThread]);
} Fail:^(id fail) {
dispatch_group_leave(group);
NSLog(@"net1fail===%@",[NSThread currentThread]);
}];
});
dispatch_group_enter(group);
dispatch_group_async(group, queue, ^{
sleep(2);
NSLog(@"同步任务B");
[YBNetworking postWithUrl:hUrl Dic:nil Suc:^(NSDictionary *data, NSString *code, NSString *msg) {
dispatch_group_leave(group);
NSLog(@"net2end===%@",[NSThread currentThread]);
} Fail:^(id fail) {
dispatch_group_leave(group);
NSLog(@"net2fail===%@",[NSThread currentThread]);
}];
});
// dispatch_group_async(group, queue, ^{
// sleep(10);
// NSLog(@"同步任务C");
// });
dispatch_group_notify(group, queue, ^{
NSLog(@"任务完成执行");
});
总结
方式一、方式二耗时相同
