Question

I have a custom UITableViewCell. All the drawing is done in the drawRect: method and no subviews are added. The drawing works fine and the scroll speed is good. But the problem is with the selected cells. I want the selection to behave like it would normally:

Blue gradient selection color
Inverted text color
Animated deselection

我没能做到这三点。

First attempt:
Set selectionStyle = UITableViewCellSelectionStyleNone and do the selection color in the drawRect method. With this method, I am able to achieve the first two things, but the deselection is instant. So one second it is selected blue, the next second it is deselected. I do not get the nice fade-out.

Second attempt:
selectionStyle = UITableViewCellSelectionStyleBlue With this method my cell is all gradient blue when selected. The text I have is not visible. The fade-out works nicely, though.

Third attempt:
Set selectionStyle = UITableViewCellSelectionStyleBlue and also set selectedBackgroundView to a UIView where I set the backgroundColor to a transparent blue. Here the problem is that the selectedBackgroundView (despite the name) is drawn on top of my normal content. So if the selectedBackgroundView is not transparent, I cannot see the text. And if it is transparent, I can see the text, but the selection color gets "faded" and does not look right.

实现这三个要点的正确方法是什么

Answer 1

好的。那么我自己的问题的答案。。。不要为自定义绘图创建UITableViewCell的子类。而是将UIImageView或UIView作为子类。

This post has a nice description of how to do it:
http://cocoawithlove.com/2009/04/easy-custom-uitableview-drawing.html

Answer 2

我建议将第二次尝试与手势识别器结合使用。检查用户是否按下单元格，如果按下，请将该单元格中的文本颜色设置为黄色（或者蓝色的反转是什么？xD）。

示例代码：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if (touch.view isKindOfClass:[UIButton class]]) {
        //do something with that view, for example: 
        //change the color of the text in that view, 
        //or invert it ;)
        return YES;
    }
    return NO;
}

或者，您可以将UIGestureRecognizer附加到该按钮。这样，就可以在选择器中插入调用的类。

按照你的要求去做可能会有更好的选择。我刚刚想到，如果你已经有2/3的分数在工作，这应该会帮助你获得3/3。

友情链接