我正在使用NSOperationQueue,我想添加新的NSOperations到NSOperationQueue.它是一个排队,生活在一个类的单身实例.如果我可以通过传递代理将所有内容移动到静态类中,这将使事情变得更加容易.
这是我现在的代码,因为它在一个cellForRowAtIndexPath
NSString *key = [NSString stringWithFormat:@"%@%@",cell.dataItem.ItemID,cell.dataItem.ManufacturerID];
if (![self.imgOperationInQueue valueForKey:key]) {
ImageOperation *imgOp = [[ImageOperation alloc] initWithItemID:cell.dataItem.ItemID withManufacturerID:cell.dataItem.ManufacturerID withReurnType:kThumbnail];
imgOp.identifier = [NSString stringWithFormat:@"%i",cell.tag];
imgOp.delegate = self;
[[SharedFunctions sharedInstance] addImageOperationToQueue:imgOp];
[imgOp release];
// store these in the dictionary so we don;t queue up requests more than once
[self.imgOperationInQueue setValue:cell.dataItem.ItemID forKey:key];
}
如果我可以添加委托作为参数,我可以将所有这些代码放入共享单例类中,并从我的应用程序的任何地方调用它.
我想我可以使用NSNotification – 或者我可以使用某种块？
解决方法
只需创建适当的init方法传递给委托.
- (id)initWithItemID:(NSString *)itemID
withManufacturerID:(NSString *)manufacturerID
withReurnType:(NSInteger)type
delegate:(id<YourDelegate>)theDelegate
{
self = [super init];
if (self)
{
.... // Other assignments
self.delegate = theDelegate;
}
return self;
}
