objective c usleep

Log-------The successful use of block in JavaScript calls the method back to Objective-c, and still follows the various features of the JavaScript method, such as the method parameter is not fixed. Also because of this, JSContext a class method is provided to get the argument list ( + (JSContext *)currentContext; ) and the object that is currently calling the method ( + (JSValue *)currentThis ). For "this" , the content of the output is GlobalObject that this is JSContext what the object method

(nonatomic, copy) NSString * text; @ End Thenclass_addProtocolAdd the Protocol to it: -(Void) viewDidLoad {[Super viewDidLoad]; TextField. text = @ "7 ";Class_addProtocol ([UITextField class], @ protocol (JSUITextFieldExport ));} ForUIButtonAdd the following event as long astextFieldInputJSContextAnd then read itstextValue, which is re-assigned after auto-increment 1: -(IBAction) pressed :( id) sender {JSContext * context = [[JSContext alloc] init]; Context [@ "te

two parts, one of which is the characteristics of the language or platform, some of them are the implementation and application of common technologies in the industry in this language or platform. In the subsequent series of blog posts, we will compare the Java and Objetive-C languages on the Android and iOS platforms. Some will extract other blog posts, some will write some examples, and other Blog content will also be written as examples. The cont

a memory pool for that thread40. Which methods of class nsobject are often used?Answer: NSObject is the base class of Objetive-c, which is composed of NSObject class and a series of protocols.Class methods Alloc, Class, Description object Methods init, Dealloc, –performselector:withobject:afterdelay: etc. are often used41. What is a simple construction method?Answer: The simple construction method is generally provided by the Cocoatouch framework, su

data thread created by the user himself needs to create a memory pool for that thread40. Which methods of class nsobject are often used?Answer: NSObject is the base class of Objetive-c, which is composed of NSObject class and a series of protocols.Class methods Alloc, Class, Description object Methods init, Dealloc, –performselector:withobject:afterdelay: etc. are often used41. What is a simple construction method?Answer: The simple construction meth

@objc to all variables, methods, and properties, if the class itself is preceded by the @objc keyword. When you use @iboutlet, @IBAction, or @nsmanaged properties, the @objc is automatically added to the front. This keyword can also be used in target-action design patterns in objetive-c, for example, Nstimer or UIButton.When you use the Swift API in objective-c, the compiler usually makes a direct translation of the statement. For example, Swift API

Objective-c code. In another case, if your Swift class does not originate from the Objectve-c class and you want to be able to use it in Objecive-c code, you can use the @objc attribute described below.@objc can make your Swift API available in objective-c. In other words, you can make them available in the Objective-c code by adding @objc to any Swift methods, classes, attributes. If your class inherits from Objective-c, the compiler will automatically help you complete this step. The compiler

set of data models3> Select different controllers according to Iphone\ipad (ipad may use Uisplitviewcontroller)4> choose a different interface according to Iphone\ipadKeyword atomic in Objective C? In Objetive-c What is the Atomic keyword1> Atomic is atomic2> Atomic will lock the implementation of the Set methodWhat is UIView animations? UIView's animated effects have thoseThe core animation of the UIView package can be implemented through the class

Just into the development of iOS, the feeling is quite laborious, for the complex interface of the drawing is more difficult. Talk not much, turn to the point ...Today, I encountered the "linker command failed with exit code 1 (use-v to see invocation)" Question,What makes me depressed is that Xcode doesn't point out the code for a specific error, which makes it more difficult for a novice to find a problem,Here's a summary of the mistakes I've encountered:1. Images that are linked or used in St

. CGRect and NSString ConversionCGRect rect = CGRectMake (00); *rectstring = nsstringfromcgrect (rect)) = cgrectfromstring (rectstring);10.CGRect and Nsdictionary ConversionCGRect rect = CGRectMake (00= Cgrectcreatedictionaryrepresentation (rect); Nsdictionary// autoreleasedcfrelease (framedictref); NSLog (@ "%@"rect);CGRect and Nsvalue ConversionOnly OBJETIVE-C objects can be stored in the Nsarray,nsdictionary container, and C structures canno

TestObjectiveFunction(t *testing.T) {if 5 != objective_function([]float64{1, 2}) {t.Error("Objetive function failed")}}func TestSearch(t *testing.T) {//var problem_size = 2var search_space = make([][2]float64, problem_size)for i, _ := range search_space {search_space[i] = [2]float64{-5, 5}}//const max_iteration = 100//var best = RandomSearch(search_space, max_iteration)if best.Vector == nil {t.Error("Search result should not be nil.")}fmt.Println("Do

From: http://oasku.com /? Q-104.html First, start with copy. In short, the purpose of copy is to generate a new instance and assign values to all its members based on the original Instance. For non-pointer-type members, such as BOOL, int, float, such values can be directly assigned. However, for pointer-type data, such as objects used in Objc, There is Deep Copy and Shallow CopyDifference-this is basically the same as in C ++: Yes Generate a new member object, Or Point to the same Member object

IOS Xcode: linker command failed with exit code 1 (use, xcodelinker I just transferred to iOS for development, but it is still difficult to draw complex interfaces. Let's not talk much about it... Today, we have another problem with "linker command failed with exit code 1 (use-v to see invocation, What bothers me most is that Xcode does not point out specific error code, which makes it more difficult for a newbie to find a problem, The following is a summary of my errors: 1. The link or i

that the use of Nsarray only indicates that the array does not change at run time, i.e. it cannot add and remove elements to the Nsaarry array, but does not indicate that the contents of elements within its array cannot be changed. Nsarray is thread-safe, Nsmutablearray is not thread-safe, and multithreading is used to nsmutablearray needs attention.19. Which methods of class nsobject are often used?A: NSObject is the base class of Objetive-c, which

@objc to all variables, methods, and properties, if the class itself is preceded by a @objc keyword. When you use @iboutlet, @IBAction, or @nsmanaged properties, @objc is automatically added to the front. This keyword can also be used in target-action design patterns in objetive-c, such as Nstimer or UIButton. When you use the Swift API in Objective-c, the compiler basically translates the statements directly. For example, Swift API func playsong (n

initialization declaration and marker annotation to the debugging file. the execution time of each annotation is printed at the end of the file. The example is as follows: Require_once 'benchmark/Timer. php'; $ timer = new Benchmark_Timer (); $ timer-> start (); $ timer-> setMarker ("marker 01"); usleep (1 ); $ timer-> setMarker ("marker 02"); usleep (2); $ timer-> setMarker ("marker 03");

Notes about some problems encountered by linux network programs-general Linux technology-Linux programming and kernel information. The following is a detailed description. I have been writing a network proxy program for linux recently, but the program is often dumped under many users and pressure, so it is depressing. Note the following issues that have not been encountered in windows: 1. Frequent thread opening When the program frequently opens threads, there may be insufficient memory and

dispatch_group_t group = Dispatch_group_create (); dispatch_queue_t global_queue = dispatch_get_global_queue (dispatch_queue_priority_default, 0) //2. Submit a task to global_queue, and add it to group //global_queue is not a queue, But group must be the same //group only asynchronous commit, no synchronous commit Dispatch_group_async (group, Global_queue, ^{ Usleep (10000); NSLog (@ "buy pot"); }); dispatch_group_as

needs to put the start method into the new thread, The Performselectorinbackground is an implicitly created thread, and we have no way to manage him, so we use the queue to create new threads, which is what is newly learned [CN performselectorinbackground:@ Selector (start) Withobject:nil]; NSLog (@ "AAA"); 5. Create Nsoperationqueue 1. Create Nsoperationqueue //Create thread manager nsoperationqueue* OpQ = [[Nsoperationqueue alloc]init]; 2. Add a single o

initialization declaration and marker annotation to the debugging file. the execution time of each annotation is printed at the end of the file. The example is as follows: Require_once 'benchmark/Timer. php'; $ timer = new Benchmark_Timer (); $ timer-> start (); $ timer-> setMarker ("marker 01"); usleep (1 ); $ timer-> setMarker ("marker 02"); usleep (2); $ timer-> setMarker ("marker 03");