不确定的行为,因为我怀疑我陷入僵局,
我有一个具有多个对象的类 – 每个对象创建一个具有相同名称的队列.我不知道GCD是否在对象之间重复使用相同的队列,或者如果他们只是共享相同的名称.
例如
@interface MyClass
-(void)doSomeWork
@property (nonatomic,strong) dispatch_queue_t myQueue;
@end
@implementation MyClass
-(id)init
{
self = [super init];
self.myQueue = dispatch_queue_create("MyQueue",disPATCH_QUEUE_SERIAL);
return self;
}
-(void)doSomeWork
{
dispatch_async(self.myQueue,^{
// some long running work
});
}
@end
@interface SomeClassWhichCreatesALotOfObjects
@end
@implementation SomeClassWhichCreatesALotOfObjects
-(void)someMethod
{
for(int i = 0; i < 10000; i++)
{
MyClass *object = [MyClass new];
[object doSomeWork]; // are these running in serial to each other or are each offset to the queue their object has created? Can't understand from the debugger
}
}
@end
解决方法
正如苹果公司的文件所述,标签是：
A string label to attach to the queue to uniquely identify it in debugging tools such as Instruments…
它被用作提示,没有更多.
编辑
以下是使用共享队列的代码.
+ (dispatch_queue_t)sharedQueue
{
static dispatch_queue_t sharedQueue;
static dispatch_once_t oncetoken;
dispatch_once(&oncetoken,^{
sharedQueue = dispatch_queue_create("MyQueue",NULL);
});
return sharedQueue;
}