添加NSControl到IKImageBrowserCell

Question

我已經構建了一個自定義的IKImageBrowserCell，它在IKImageBrowser中顯示我的圖像沒有任何問題。

我想嘗試重寫內置的IKImageBrowser刪除圖像功能。目前「開箱即用」，您可以選擇一個圖像或多個圖像，然後按BACKSPACE刪除。

我想添加一個NSButton或類似的，以便在每個圖像上啓用相同的功能。

我已經添加以下代碼顯示在IKImageBrowserCell刪除圖標選中時：

- (CALayer *) layerForType:(NSString*) type { 

CGColorRef color; 

//retrieve some usefull rects 
NSRect frame = [self frame]; 
NSRect imageFrame = [self imageFrame]; 
NSRect relativeImageFrame = NSMakeRect(imageFrame.origin.x - frame.origin.x, imageFrame.origin.y - frame.origin.y, imageFrame.size.width, imageFrame.size.height); 

if(type == IKImageBrowserCellForegroundLayer){ 
    //no foreground layer on place holders 
    if([self cellState] != IKImageStateReady) 
     return nil; 

    //create a foreground layer that will contain several childs layer 
    CALayer *layer = [CALayer layer]; 
    layer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height); 


    if([self isSelected]){ 

     //add a delete icon 
     CALayer *deleteLayer = [CALayer layer]; 

     [deleteLayer setContents:(id)deleteImage()]; 
     deleteLayer.frame = CGRectMake(relativeImageFrame.size.width-14, (relativeImageFrame.origin.y+relativeImageFrame.size.height)-14, 28, 28); 
     [layer addSublayer:deleteLayer]; 
    } 
    } 
} 

這個偉大的工程，但顯然只是一個靜態圖像。有什麼辦法可以嘗試從點擊這個刪除圖標中獲取一個事件，然後將選定的單元格索引返回給IKImageBrowser以調用它的removeItemsFromIndex：方法？我卡住了！

Answer 1

myIKImageBrowserView.selectionIndexes（）返回當前選定單元格的的NSIndexSet - 你可以用它來調用removeItemsFromIndex方法在刪除層之前

https://developer.apple.com/library/mac/documentation/GraphicsImaging/Reference/IKImageBrowserView/index.html