cocoa - 单击表外某处时取消选择 NSTableView

Question

我有一个 NSTableView 放置在 NSView 之上。当鼠标指针在 NSView 上单击时，我想取消选择 NSTableView。如何实现这一目标？

Answer 1

我知道这已经很旧了，但一个选择是继承 NSTableView 并覆盖其 mouseDown:

- (void)mouseDown:(NSEvent *)event {

    [super mouseDown:event];

    NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
    NSInteger row = [self rowAtPoint:point];

    if (row == -1) { // We didn't click any row

        [self deselectAll:nil];
    }
}

Swift 3 版本:

override open func mouseDown(with event: NSEvent) {
    super.mouseDown(with: event)

    let point    = convert(event.locationInWindow, from: nil)
    let rowIndex = row(at: point)

    if rowIndex < 0 { // We didn't click any row
        deselectAll(nil)
    }
}