draggingEntered：叫，但performDragOperation：不IKImageBrowserView

Question

使用IKImageBrowserView與設定的下降deleagte

[self.imageBrowserView setDraggingDestinationDelegate:self]; 

不管我在draggingEntered返回

我'：在performDragOperation：獲取從不叫

- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender { 
    // GETS CALLED 
    return NSDragOperationEvery; 
} 

- (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender { 
    // NOT CALLED 
    return YES; 
} 

- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender { 
    // NOT CALLED 
    return YES; 
} 

Answer 1

顯然draggingUpdated:必須實施。