Multithreading (i) Nsthread

Multi-Threading implementations in iOS:

Technology	Language	Thread life cycle	Frequency of Use
Pthread	C	Programmers manage themselves	Almost no
Nsthread	Oc	Programmers manage themselves	Occasional use
GCD	C	Automatic Management	Frequently used
Nsoperation	Oc	Automatic Management	Frequently used

The state of the thread

how Nsthread is created :

    Create thread mode one    nsthread *threadone = [[Nsthread alloc] initwithtarget:self selector: @selector (testaction) Object:nil];    //Give the thread a name    Threadone.name = @ "Threadone";    Start the thread, execute the Testaction method on the newly opened thread    [threadone start];       Thread mode Two is created and will start automatically    [Nsthread detachnewthreadselector: @selector (testaction) totarget:self Withobject:nil];        Create thread mode three, implicit creation, auto-start    [self performselectorinbackground: @selector (testaction) Withobject:nil];

method to invoke

-(void) testaction{    for (int i = 0; i < 3; i++)    {        NSLog (@ "i =%d, current thread =%@", I,[nsthread CurrentThread]);    }}

Result: You can see that there are 3 threads executing concurrently

Properties of the thread:

    Create a thread    nsthread *thread = [[Nsthread alloc] initwithtarget:self selector: @selector (testaction) Object:nil];    Thread name    Thread.Name = @ "WL";    Thread priority, general not set, default 0.5, numeric range 0-1, the higher the value the higher the priority    thread.threadpriority = 0.5;

Common methods, which are class methods that operate relative to the thread in which the code resides

    Get the main thread    [Nsthread mainthread];    Determines whether the main thread, returns a bool value    bool Ismainthread = [Nsthread ismainthread];    Returns a bool value    bool ismultithreaded = [Nsthread ismultithreaded] to determine whether it is multi-threaded;    Remove a thread from a pool of scheduled threads 2s (blocking threads)    [Nsthread sleepfortimeinterval:2];    Remove threads from the pool of scheduled threads until a point in time (blocking threads)    [Nsthread sleepuntildate:[nsdate Datewithtimeintervalsincenow:2]];    Stop thread, thread dead, this thread no longer exists    [Nsthread exit];

Multithreading (i) Nsthread