使用Thread 的類方法detachNewThreadSelector
創(chuàng)建線程
- (void)viewDidLoad{ // 調用類方法的新線程 立即開始執(zhí)行 // [NSThread detachNewThreadSelector:@selector(doIt) toTarget:self withObject:nil]; NSThread *thd = [[NSThread alloc] initWithTarget:self selector:@selector(doIt) object:nil]; // 線程優(yōu)先級 thd.threadPriority = 10; [thd start];}-(void)doIt{ UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://pic14.nipic.com/20110522/7411759_164157418126_2.jpg"]]]; UIImageView *imgv = [[UIImageView alloc] initWithImage:img]; [self.view addSubview:imgv];}
調用實例方法 start
- (void)viewDidLoad{ // 調用類方法的新線程 立即開始執(zhí)行 NSThread *thd = [[NSThread alloc] initWithTarget:self selector:@selector(doIt) object:nil]; // 線程優(yōu)先級 thd.threadPriority = 10; [thd start];}-(void)doIt{ UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://pic14.nipic.com/20110522/7411759_164157418126_2.jpg"]]]; UIImageView *imgv = [[UIImageView alloc] initWithImage:img]; [self.view addSubview:imgv];}
NSOperationQueue
- (void)viewDidLoad{ //創(chuàng)建操作隊列 NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init]; //設置隊列中最大的操作數(shù) [operationQueue setMaxConcurrentOperationCount:1]; //創(chuàng)建操作（最后的object參數(shù)是傳遞給selector方法的參數(shù)） NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(doIt) object:nil]; //將操作添加到操作隊列 [operationQueue addOperation:operation];}-(void)doIt{ UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://pic14.nipic.com/20110522/7411759_164157418126_2.jpg"]]]; UIImageView *imgv = [[UIImageView alloc] initWithImage:img]; [self.view addSubview:imgv];}
使用NSOperation子類
來創(chuàng)建線程
@implementation MyTaskOperation //相當于Java線程中的run方法 -(void)main { //do someting... NSLog(@"Thread is running..."); [NSThreadsleepForTimeInterval:3]; NSLog(@"Thread is done..."); } @end 使用方法
NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init]; MyTaskOperation *myTask = [[MyTaskOperation alloc] init]; [operationQueue addOperation:myTask]; [myTask release]; [operationQueue release];
