将NSControl添加到IKImageBrowserCell

时间:2011-01-29 15:01:43

标签: objective-c cocoa calayer ikimagebrowserview

我已经构建了一个自定义IKImageBrowserCell,它在IKImageBrowser中显示我的图像而没有任何问题。

我想尝试覆盖内置的IKImageBrowser删除图像功能。目前“开箱即用”您可以选择图像或多个图像,然后按BACKSPACE进行删除。

我想添加一个NSButton或类似功能,以便在每个图像上启用相同的功能。

我添加了以下代码,以便在选择IKImageBrowserCell时显示删除图标:

- (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];
    }
  }
}

这很好用,但显然只是静态图像。有没有什么方法可以尝试通过点击此删除图标获取事件,然后将选定的单元格索引返回到IKImageBrowser,以便调用它的removeItemsFromIndex:方法?我被困了!

1 个答案:

答案 0 :(得分:0)

myIKImageBrowserView.selectionIndexes()返回当前所选单元格的NSIndexSet - 您可以在删除图层之前使用它来调用removeItemsFromIndex方法

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