iOS Multithreaded Development Small Demo

First, demonstrate the blocking of the main thread

  dyfviewcontroller.m//  623-01-blocking multithreading////  Created by dyf on 14-6-23.//  Copyright (c) 2014 ___ fullusername___. All rights reserved.//#import "DYFViewController.h" @interface Dyfviewcontroller () @end @implementation dyfviewcontroller-(ibaction) Btnonclick {    //1. Gets the current thread    nsthread *thread = [Nsthread CurrentThread];        2. Print thread    NSLog (@ "%@", thread);        3. Perform a time-consuming operation for    (int i = 0; i < 9999; i++) {        NSLog (@ "%@", thread);        At this point, click the button, before the time-consuming operation, the button has been highlighted, during the user to click Other UI control also bad response    }}-(void) viewdidload{    [Super viewdidload];//do any Additional setup after loading the view, typically from a nib.} -(void) didreceivememorywarning{    [Super didreceivememorywarning];    Dispose of any resources the can be recreated.} @end

It is easy to find that during the time-consuming operation, other UI actions are delayed, causing the user to lag

--------Create a child threading method 1--pthread

  dyfviewcontroller.m//  623-02-pthread////  Created by dyf on 14-6-23.//  Copyright (c) 2014 ___ fullusername___. All rights reserved.//#import "DYFViewController.h" #import <pthread.h> @interface Dyfviewcontroller () @ End@implementation dyfviewcontroller//C language function void *run (void *data) {    //1. Gets the current thread    nsthread *cthread = [Nsthread CurrentThread];        2. Print thread    NSLog (@ "%@", cthread);        3.h time-consuming operation    for (int i = 0; i < 9999; i++) {        NSLog (@ "%@", Cthread);    }    return NULL;} -(Ibaction) Btnonclick {    //1. Gets the current thread    nsthread *thread = [Nsthread CurrentThread];        2. Print thread    NSLog (@ "%@", thread);        3. Perform a time-consuming operation: Create a set of sub-threads        pthread_t threadId;    Pthread_create (&threadid, NULL, *run, NULL);   } @end

Summary: This method is not commonly used, understand can