iOS Development multithreaded article-Creating threads

iOS Development multithreaded article-Creating threads

I. Simple instructions for creating and starting a thread

A Nsthread object represents a thread

Creating, starting Threads

(1) nsthread *thread = [[Nsthread alloc] initwithtarget:self selector: @selector (run) Object:nil];

[Thread start];

When a thread is started, the run method of self is executed in threads thread

Main thread related usage

+ (Nsthread *) Mainthread; Get the main thread

-(BOOL) Ismainthread; is the main thread

+ (BOOL) Ismainthread; is the main thread

Other usage

Get current thread

Nsthread *current = [Nsthread CurrentThread];

Scheduling priority for a thread: The value of the scheduling priority is 0.0 ~ 1.0, the default is 0.5, the higher the value, the greater the priority

+ (double) threadpriority;

+ (BOOL) SetThreadPriority: (double) p;

Set the name of the thread

-(void) SetName: (NSString *) n;

-(NSString *) name;

Other ways to create threads

(2) automatically start thread after creating thread [Nsthread detachnewthreadselector: @selector (Run) totarget:self Withobject:nil];

(3) Create and start the thread implicitly [self Performselectorinbackground: @selector (Run) Withobject:nil];

Pros and cons of the above 2 ways to create threads

Advantages: Simple and fast

Cons: Unable to set the thread in more detail

Second, code example

1. Create it in an ancient way

 1//2//YYVIEWCONTROLLER.M 3//4//5//Created by Apple on 14-6-23.6//Copyright (c) 2014 itcase. All rights reserved. 7//8 9 #import "YYViewController.h" #import <pthread.h>12 @interface Yyviewcontroller (ibaction ) btnclick;16 @end17 @implementation YYViewController20-(void) viewDidLoad23 {[Super viewdidload];25 }26 27 28//button click event (ibaction) Btnclick {30//1. Get current thread Nsthread *current=[nsthread currentthread];32//Master   Thread NSLog (@ "Btnclick----%@", current); 34 35//2. Use the For loop to perform some time-consuming operations. pthread_t thread;37 pthread_create (&thread, NULL, run, NULL);}39 all//c language function *run void (void *data) 43 {44//Gets the current thread, is the newly created thread Nsthread *current=[nsthread currentthread];46 (int i=0; i<10000; i++) {NSLog (@ "Btnclick---%d---%@", i,current),}51 return null;52}53 54//Multiple threads, click the button to execute the button call method, the main thread is not blocked 55 @end57 (+) 

iOS Development multithreaded article-Creating threads