nsthread

问题 why do I get "wait_fences: failed to receive reply" for this code? Is it the way I'm using notification to communicate back to the main thread? #import "ViewController.h" @implementation ViewController @synthesize alert; #pragma mark - Background Thread Test Methods - (void) ConfigTasksForBackground:(id)sender{ NSLog(@"ConfigTasksForBackground - Starting"); [NSThread sleepForTimeInterval:6]; [[NSNotificationCenter defaultCenter] postNotificationName:@"ModelChanged" object:self]; NSLog(@

问题 why do I get "wait_fences: failed to receive reply" for this code? Is it the way I'm using notification to communicate back to the main thread? #import "ViewController.h" @implementation ViewController @synthesize alert; #pragma mark - Background Thread Test Methods - (void) ConfigTasksForBackground:(id)sender{ NSLog(@"ConfigTasksForBackground - Starting"); [NSThread sleepForTimeInterval:6]; [[NSNotificationCenter defaultCenter] postNotificationName:@"ModelChanged" object:self]; NSLog(@

问题 This question already has answers here : po [NSThread currentThread] (2 answers) Closed 6 years ago . When you print a NSThread's description, you get something like this: <NSThread: 0x1e511b70>{name = (null), num = 1} Is this "num" available somehow? This is for debugging only, so it does not need to clear Apple's approval process. 回答1: That number is actually an ivar in NSThread's private implementation class. The class is _NSThreadInternal , and its name is "_private". Inside that object,

问题 How can I check for equality between dispatch_queue_t vars? dispatch_queue_t currentQueue = dispatch_get_current_queue(); dispatch_queue_t mainQueue = dispatch_get_main_queue(); if (currentQueue == mainQueue) { } from the docs: typedef struct dispatch_queue_s *dispatch_queue_t; I'm not sure but does this mean that it's a pointer to a dispatch_queue_s struct? Since I can't check equality on pointers, I'm not sure how can I check if a dispatch_queue_t is the same as another? 回答1: This depends

问题 I know UIView are not thread safe so i cant add a view on a background thread, to work around this is it ok to create a UIView on a background thread then add it on the main thread? Note: the reason im not doing this on the main thread is because my actual code is a lot more complex and therefor takes a while to create all the views and fill the values. I dont want the UI to become un-responsive when I do this so im trying to work around this. for example.. -(void)addLabel//called on

问题 Very similar issue is already discussed here. The problem at hand and what I am trying to achieve is to call a function on a given object in the thread it is created at. Here is the complete case: an instance of class A is created in a given NSThread (Thread A) (not the main one). The instance keeps its creating NSThread as a member variable. an instance of class B has one of its member functions executing in another NSThread - Thread B, and wants to call a function of A in A's creation

问题 I am using (and am required to use) a third-party framework to which I do not have source. The third-party framework handles creating an authenticated client/server connection and hands back a pair of open NSStreams. The challenge that I have is the NSStreams are scheduled on the main thread (creating situations where the UI may become unresponsive - which I would like to avoid). At the point that the streams are handed off from the third party framework, no network traffic is in progress. So

问题 I have a problem in my code. I want to launch the thread but when it is launched they can't start a NSTimer istruction. Can you help me? -(void)detectionMove:(NSTimer*)timer{ int indexArray = [[[timer userInfo] objectForKey:@"arrayIndex"] intValue]; // do something } -(void)callDectectionMove:(NSNumber*)arrayIndex{ NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init]; NSMutableDictionary *myDictionary = [[NSMutableDictionary alloc] init]; [myDictionary setObject:arrayIndex forKey:@

问题 As I understand there are several ways to send tasks to be performed in threads. The most common ones that I use are: 1) performSelector:withObject:afterDelay: 2) performSelectorOnMainThread:withObject:waitUntilDone: 3) performSelectorInBackground:withObject: 4) [NSThread detachNewThreadSelector:toTarget:withObject:] My first question is, what is the difference between 1) and 2), besides the obvious parameter differences? Are they actually both working in the Main thread (whose autorelease

问题 Is there any way I can kill a thread spawn through: [NSThread detachNewThreadSelector:@selector(serverFetchInThread) toTarget:self withObject:nil]; The scenario I am working on is that in my main thread I am letting user enter data in my search bar and what ever user is typing I need to send to server for searching in a separate thread. Now, if user changes his selection by deleting old data and entering new data I do not want the previous thread to waste its time, kill it and spawn a new