NSThread起线程用法2

 NSThread是起线程的主角，大部分时候我们使用这个类。

建一个view-based application.

在viewcontroller.h中

@interface tNSThreadViewController : UIViewController {

    NSThread *t1;
    BOOL bExit;
}
@property BOOL bExit;
- (IBAction)checkit:(id)sender;
- (IBAction)start2:(id)sender;
- (IBAction)start:(id)sender;
-(void)doSomething:(id)data;
@end

 

在viewcontroller.m中

 

#import "tNSThreadViewController.h"

@implementation tNSThreadViewController
@synthesize bExit;
-(void)doSomething:(id)data
{
    
    /*[[t1 threadDictionary] setObject:@"kkk" forKey:@"k11"];
    NSMutableDictionary * md = [t1 threadDictionary];
    NSString *t = [md objectForKey:@"k11"];
    NSLog(@"%@", t);    
    NSLog(@"kasdkf");*/
    //NSString *d = (NSString *)data;
    //NSLog(@"%@",d);
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSString *s = [NSString stringWithFormat:@"%d",1];
    NSLog(@"%@",s);
    while (true) {
        [NSThread sleepForTimeInterval:0.5];
        NSLog(@"IN thread");
        tNSThreadViewController *inputData = (tNSThreadViewController *)data;
        if(inputData.bExit)
            break;
    }
    [pool release];
  
   
}


- (void)viewDidLoad
{
    bExit = NO;
    [super viewDidLoad];
}



- (IBAction)checkit:(id)sender {
    bExit = YES;
    if([NSThread isMultiThreaded]) {
        NSLog(@"it is multi thread");
    }
    else {
        NSLog(@"it is not multi thread");
    }
}

- (IBAction)start2:(id)sender {
    if(t1 != nil)
    {
        
        [t1 release];
        t1 = nil;
    }
    t1 = [[NSThread alloc] initWithTarget:self selector:@selector(doSomething:) object:self];
    [t1 setStackSize:1024*1024];
    [t1 setThreadPriority:0.5];
    
    [t1 start];
    
    /*NSThread *t2 = [[NSThread alloc] initWithTarget:self selector:@selector(doSomething:) object:@"2"];
    [t2 setStackSize:1024*1024];
    [t2 setThreadPriority:0.9];
    
    [t2 start];*/

}

- (IBAction)start:(id)sender {
    //[self performSelectorInBackground:<#(SEL)#> withObject:<#(id)#>
    [NSThread detachNewThreadSelector:@selector(doSomething:) toTarget:self withObject:nil];
}
@end

最后需要说明的是，iOS应用的主线程的栈大小缺省为1M，其他线程的栈大小缺省为512K,很多网上文章说，不能调这个大小，那是以讹传讹，如何调大小，请看我的代码。