nsthread

Difference in scheduling NSTimer in main thread and background thread?

由 走远了吗. 提交于 2019-12-18 10:53:06
问题 When I call scheduledTimerWithTimeInterval:target:selector:userInfo:repeats: on the main thread and set time interval to 5 seconds code below timer gets executed, and after 5 seconds timer selector is called. But if I try same in some background thread, the code below scheduledTimerWithTimeInterval:target:selector:userInfo:repeats: will not be executed, it will wait for the timer to fire and then gets executed. Of course, in order to run the timer in the background thread, I first got an

Difference in scheduling NSTimer in main thread and background thread?

由 醉酒当歌 提交于 2019-12-18 10:52:06
问题 When I call scheduledTimerWithTimeInterval:target:selector:userInfo:repeats: on the main thread and set time interval to 5 seconds code below timer gets executed, and after 5 seconds timer selector is called. But if I try same in some background thread, the code below scheduledTimerWithTimeInterval:target:selector:userInfo:repeats: will not be executed, it will wait for the timer to fire and then gets executed. Of course, in order to run the timer in the background thread, I first got an

Order of operations in runloop on iOS

由 跟風遠走 提交于 2019-12-17 22:37:26
问题 What is the order of operations on iOS? I'm thinking sepcifically about timing of setNeedsLayout and layoutSubviews setNeedsDisplay and drawRect touch recognition [NSTimer scheduledTimerWithTimeInterval:0.000001 tar(...)] dispatch_async(dispatch_get_main_queue(), ^{ /* code */} As an example of an answer I would like to receive it could be in this format: dispatch_async on main Happens before the next runcycle drawRect Happens at the end of the runcycle 回答1: (Parts of this are copied from my

IOS NSThread的简单使用 及performSelectorInBackground

由 China☆狼群 提交于 2019-12-15 19:39:00
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 在ios开发过程中，经常会遇到在服务器端获取完数据通过后台使用多线程方式自动更新UI，通常的做法有两种： 1、使用NSObject类的方法performSelectorInBackground:withObject:来创建一个线程。 具体的代码： [Object performSelectorInBackground:@selector( doSomething: ) withObject:nil]; 2、选择使用NSThread实现多线程。 NSThread创建主要有两种方式： （1）： [NSThread detachNewThreadSelector:@selector( doSomething: ) toTarget:self withObject:nil]; （2）： NSThread* myThread = [[NSThread alloc] initWithTarget:self selector:@selector( doSomething: ) object:nil]; [myThread start]; 这两种方式的区别在于： 前一种调用就会立即创建一个线程并执行selector方法；第二种方式尽管alloc了一个新Thread，但需要手动调用start方法来启动线程

does the one thread kill the other in a iphone application( both thread are main thread)?

由 末鹿安然 提交于 2019-12-13 19:48:21
问题 HI guys, ==>in my application i have used three different thread code for one of them is here all thread are of same kind ==>i have defined two thread in appdelegate class ==>one in the root view controller ==>all the thread having different sleep time My question is that does any thread may get killed by the other and the invocation time for one thread get affected by the other? -(void)PostData { NSAutoreleasePool *apool = [[NSAutoreleasePool alloc] init];// we are responsible for the memory

I don't know why my view is freezing

由 回眸只為那壹抹淺笑 提交于 2019-12-13 19:02:40
问题 I have a big problem since a few days that I can't solve. First I have a login view controller with this code : @implementation MMConnectionViewController @synthesize login, password, activityIndicator, mainVC; - (BOOL)textFieldShouldReturn:(UITextField *)aTextField { [aTextField resignFirstResponder]; [self performSelectorOnMainThread:@selector(startRolling) withObject:nil waitUntilDone:NO]; [NSThread detachNewThreadSelector:@selector(connect) toTarget:self withObject:nil]; return YES; } -

MKMapView Not Loading When Called on an NSThread?

由 一个人想着一个人 提交于 2019-12-13 03:04:03
问题 I am creating a MKMapView in a method named "generateMap". From inside viewDidLoad, this works: [self generateMap]; but this causes the map to quickly load and then disappear, leaving only the blank grey grid: [NSThread detachNewThreadSelector:@selector(generateMap) toTarget:self withObject:nil]; Any ideas why this might be happening when I call the method through a thread? I ended up doing this: -(void)viewDidLoad { [NSThread detachNewThreadSelector:@selector(spinTheSpinner) toTarget:self

How can i stop the background thread from the main thread in Iphone NSthread?

由 二次信任 提交于 2019-12-12 10:17:42
问题 I start a background thread from my program while my main thread is checking something. If the checking goes false, I want to stop the running background thread and start it all over again with my new parameters. I want to stop it coz the thread will be downloading images and if I doesnt stop it and call it again, it will take a lot of time for the new images to get downloaded. Is it possible to do so? 回答1: In my experience, its usually best to let a thread exit gracefully by itself. How

performSelector:OnThread:waitUntilDone not executing the selector all the time

由 徘徊边缘 提交于 2019-12-12 05:58:18
问题 I have an app where the network activity is done in its separate thread (and the network thread continuously gets data from the server and updates the display - the display calls are made back on the main thread). When the user logs out, the main thread calls a disconnect method on the network thread as follows: [self performSelector:@selector(disconnectWithErrorOnNetworkThread:) onThread:nThread withObject:e waitUntilDone:YES]; This selector gets called most of the time and everything works

iOS call soap functions in thread

由 眉间皱痕 提交于 2019-12-12 04:12:48
问题 guys I'm a new iOS developer, I'm having a problem when calling soap functions in new thread. Here is more details: I have a function calling soap web service: WebService *webService = [[[WebService alloc]init]retain]; [webService getUser:self action:@selector(getUserHandler) userName: usnm encPassword: pswd]; This function is simply generated from sudzc.com(Great Website! Thanx!) simply calling this function I can get <user><username>XXX</username><userStatus>XXX</userStatus><companyCode>XXX
订阅 nsthread