在Objecttive-C里創建多線程一般有兩種方法， 一種是initWithTarget，還有一種是detachNewThreadSelector。

下面是兩個實例，創建多線程的實例,支持傳遞參數.

initWithTarget方式

// // main.m // initWithTarget // Created by exchen on 5/8/15. // Copyright (c) 2015 exchen. All rights reserved. //#import <Foundation/Foundation.h>@interface classa : NSObject-(void)StartThread:(NSString *)str;@end@implementation classa-(void)StartThread:(NSString *)str { sleep(3);NSLog(str);exit(0); }@endint main(int argc, const char * argv[]) {@autoreleasepool {// insert code here...NSLog(@"Hello, World!");}classa *a = [[classa alloc] init];NSThread *thread = [[NSThread alloc] initWithTarget:a selector:@selector(StartThread:) object:@"Start"];[thread start];sleep(5);return 0; }

detachNewThreadSelector方式

// // main.m // TestThread // // Created by exchen on 5/8/15. // Copyright (c) 2015 exchen. All rights reserved. // #import <Foundation/Foundation.h>@interface classa : NSObject-(void)StartThread:(NSString *)str;@end@implementation classa-(void)StartThread:(NSString *)str {NSLog(@"%@",str);exit(0); }@endint main(int argc, const char * argv[]) {@autoreleasepool {// insert code here...NSLog(@"Hello, World!");classa *a = [[classa alloc] init];[NSThread detachNewThreadSelector:@selector(StartThread:) toTarget:a withObject:@"Start"];sleep(5);}return 0; }

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