iOS使用NSOperation创建线程

- (IBAction)nsop1:(id)sender {

//使用NSOperationQueue
可以用depend非常方便的控制线程之间的执行顺序

NSOperationQueue *q=[[NSOperationQueue
alloc]
init];

[q addOperationWithBlock:^{

int x=0;

while (x<20) {

NSLog(@"%@",[NSThread
currentThread]);

[NSThread
sleepForTimeInterval:2];

//多线程间参数传递

[self
performSelector:@selector(showInfo:)
onThread:[NSThread
mainThread] withObject:@"create-queue dispathc-syn"
waitUntilDone:NO];
x++;
}

}];
}
- (IBAction)nsop2:(id)sender {

NSBlockOperation *b1=[[NSBlockOperation
alloc]init];

[b1 addExecutionBlock:^{

NSLog(@"test NSBlockOperation %@",[NSThread
currentThread]);

}];

NSBlockOperation *b2=[NSBlockOperation
blockOperationWithBlock:^{

NSLog(@"test BSBlockOperation blockOperationWithBlock! %@",[NSThread
currentThread]);
}];

NSOperationQueue *q=[[NSOperationQueue
alloc]
init];
[q
addOperation:b1];
[q
addOperation:b2];
}
- (IBAction)nsop3:(id)sender {

NSBlockOperation *b1=[[NSBlockOperation
alloc]init];

[b1 addExecutionBlock:^{

NSLog(@"test NSBlockOperation %@",[NSThread
currentThread]);

}];

NSBlockOperation *b2=[NSBlockOperation
blockOperationWithBlock:^{

NSLog(@"test BSBlockOperation blockOperationWithBlock! %@",[NSThread
currentThread]);
}];

NSOperationQueue *q=[[NSOperationQueue
alloc]
init];

q.maxConcurrentOperationCount=4;
[b1
addDependency:b2];
[q
addOperation:b1];
[q
addOperation:b2];

}