如何旋转UITableViewCellAccessoryDisclosureIndicator？ [英] How to rotate UITableViewCellAccessoryDisclosureIndicator?

问题描述

我正在为ios app制作一个带有可展开/可折叠单元格的 UITableView 。我在这些单元格上放了一个 UITableViewCellAccessoryDisclosureIndicator 但我想在单元格展开/折叠时使箭头向上/向下。

I'm making a UITableView with expandable/collapsable cells for ios app. I put a UITableViewCellAccessoryDisclosureIndicator on these cells but I'd like to make the arrow headed up/down when the cell is expanded/collapsed.

我发现可以制作一个带有自定义图像的按钮，并根据单元格的状态更改按钮，但它对我来说似乎很脏，因为我不需要按钮，我必须添加2个图像到项目（好吧，它不是那么大，但无论如何）。

I found that it's possible to make a button with a custom image and change the button according to the state of the cell but it seems dirty to me because I don't need a button there and I have to add 2 images to the project (ok it's not that big but anyway).

因此，简单地旋转现有的 UITableViewCellAccessoryDisclosureIndicator 是不是更好？如果是这样我怎么能这样做？

So shouldn't it be better to simply rotate the existing UITableViewCellAccessoryDisclosureIndicator ? and if so how can I do that?

推荐答案

这不是你想要的，但这是我想到的第一件事。首先，实例化UIButtonTypeDetailDisclosure类型的按钮：

This is not exactly what you want, but this the first thing I thought of. First, instantiate a button of type UIButtonTypeDetailDisclosure:

UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

接下来，将按钮旋转90度：

Next, rotate the button 90 degrees:

CGAffineTransform rotationTransform = CGAffineTransformIdentity;
rotationTransform = CGAffineTransformRotate(rotationTransform, DegreesToRadians(90));
button.transform = rotationTransform;

最后，使用按钮作为附件查看：

Finally, use the button as the accessoryView:

cell.accessoryView = button;

希望有所帮助。

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