NSThread小笔记

接口

Initializing an NSThread Object

• – init
• – initWithTarget:selector:object:

Starting a Thread

• + detachNewThreadSelector:toTarget:withObject:
• – start
• – main

Stopping a Thread

• + sleepUntilDate:
• + sleepForTimeInterval:
• + exit
• – cancel

Determining the Thread’s Execution State

• – isExecuting
• – isFinished
• – isCancelled

Working with the Main Thread

• + isMainThread
• – isMainThread
• + mainThread

Querying the Environment

• + isMultiThreaded
• + currentThread
• + callStackReturnAddresses
• + callStackSymbols

Working with Thread Properties

• – threadDictionary
• – name
• – setName:
• – stackSize
• – setStackSize:

Working with Thread Priorities

• + threadPriority
• – threadPriority
• + setThreadPriority:
• – setThreadPriority:

注意点：在自己生成的线程里面要自己管理内存，其余应该是比较简单的，thread priorities的范围是0-1的小数，1的优先级最高，dictionary可以用来存放一些信息，比如在Foundation框架里面使用这个字典来存放NSConnection和NSAssertionHandler的实例

写个小demo

- (void)viewDidLoad

{

    [superviewDidLoad];

    NSNumber *oneNumb = [NSNumber numberWithInt:1];

    NSThread *one = [[NSThreadalloc] initWithTarget:self

                                            selector:@selector(oneMethod:)

                                              object:oneNumb];

    [one start];

　　[one setThreadPriority:0.8];

    NSLog(@"one == %f", [one threadPriority]);

}

-(void)oneMethod:(NSNumber *)num

{

    @autoreleasepool {

//        [NSThread sleepForTimeInterval:3];

//        NSLog(@"-------exit");

//        [NSThread exit];

        NSLog(@"-------one = %d", [num intValue]);

        if (![[NSThreadcurrentThread] isMainThread]) {

            NSLog(@"-------sub thread");

        }

        ;

        NSLog(@" addreass ----  %@ ------num = %d",     [[NSThreadcallStackReturnAddresses] objectAtIndex:0],[[NSThreadcallStackReturnAddresses] count]);

    }

}