想要做一个如下图的需求 用户第一次注册之后显示

我的思路是：1.在用户注册成功的block 里面发送通知  2.在初始化页面注册通知监听

[RequestUtilscommonPostMultipartFormDataUtils:self.parmsForAPIbURL:urlbAnimatedViewController:selfconstructingBodyWithBlock:^(id_NonnullformData) {

[MBProgressHUDshowHUDAddedTo:self.viewanimated:YES];

[formDataappendPartWithFileData:UIImageJPEGRepresentation(self.avatarImageView.image,0.5)name:@"photo"fileName:fileNamemimeType:mimeType];

}success:^(id_Nullabledict) {

[MBProgressHUDhideHUDForView:self.viewanimated:YES];

[selfsaveUserDefaultFormRequestAPI:dict];

NSLog(@"rongyun token Test%@",dict);

//发送红包通知

[[NSNotificationCenterdefaultCenter]postNotificationName:@"FIRSTREGISTE"object:nil];

AppDelegate*appDelegate = (AppDelegate*)[[UIApplicationsharedApplication]delegate];

[self.viewremoveFromSuperview];

[appDelegateloginSuccess];

}failure:^(id_Nullablefailure) {

[MBProgressHUDhideHUDForView:self.viewanimated:YES];

}];

-(void)viewWillAppear:(BOOL)animated{

[superviewWillAppear:animated];

//add红包通知

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(handleFirstRedPacket)name:@"FIRSTREGISTE"object:nil];

}

-(void)viewDidDisappear:(BOOL)animated{

[[NSNotificationCenterdefaultCenter]removeObserver:selfname:@"FIRSTREGISTE"object:nil];

}

但是这样是不能够接收到通知的！！！！！！因为不在一个线程里面，注册成功block 里买呢发送通知 那是一个新的线程，而接受却是在主线程里面，所以说发送和接受必须在同一个线程，而且最好都在主线程，利用gcd 来从子线程回到主线程，所以改代码如下：

[RequestUtilscommonPostMultipartFormDataUtils:self.parmsForAPIbURL:urlbAnimatedViewController:selfconstructingBodyWithBlock:^(id_NonnullformData) {

[MBProgressHUDshowHUDAddedTo:self.viewanimated:YES];

[formDataappendPartWithFileData:UIImageJPEGRepresentation(self.avatarImageView.image,0.5)name:@"photo"fileName:fileNamemimeType:mimeType];

}success:^(id_Nullabledict) {

[MBProgressHUDhideHUDForView:self.viewanimated:YES];

[selfsaveUserDefaultFormRequestAPI:dict];

NSLog(@"rongyun token Test%@",dict);

dispatch_async(dispatch_get_main_queue(), ^{

//发送红包通知

[[NSNotificationCenterdefaultCenter]postNotificationName:@"FIRSTREGISTE"object:nil];

});

AppDelegate*appDelegate = (AppDelegate*)[[UIApplicationsharedApplication]delegate];

[self.viewremoveFromSuperview];

[appDelegateloginSuccess];

}failure:^(id_Nullablefailure) {

[MBProgressHUDhideHUDForView:self.viewanimated:YES];

}];