获取UIView级别的UITextField Y坐标？ [英] Get UITextField Y coordinate on UIView level?

问题描述

目前，我在自定义单元格中有一个UITextField，我想在视图控制器视图（UIView）的水平上获取该UITextField的Y坐标。目前，我正在尝试执行以下操作：

Currently I have a UITextField in a custom cell and I want to get the Y coordinate of that UITextField on the level of the View Controller's view (UIView). Currently I am trying to do something like this:

if (thetextField.superview.superview.superview.frame.origin.y >= keyboardY) {

}

但似乎Y坐标实际上不是0时始终为0。有什么方法可以做到这一点？

But it seems that the Y coordinate is always 0 when it is in fact not. Is there any way to achieve this?

我这样做是因为我想检测UIKeyboard是否在UIView级别上阻塞了UITextField，以便我可以重新安排

I am doing this because I want to detect whether the UIKeyboard is blocking the UITextField on the UIView level so that I can re-arrange my cells accordingly.

谢谢！

推荐答案

检查<$ c 中的$ c> convertPoint：* 方法UIView文档。通过这些方法，您可以将点映射到其他视图坐标或从其他视图坐标映射。

Check convertPoint:* methods in UIView documentation. These methods allow you to map point to or from other views coordinates.

假设 self 是视图控制器，该行在视图控制器的视图坐标中返回文本字段的原点：

Provided that self is a view controller, this line returns text field's origin in view controller's view coordinates:

[thetextField convertPoint:thetextField.frame.origin toView:self.view];

您还可以使用 convertRect：*以类似的方式转换矩形。 code>方法。

You can also convert rects in a similar fashion using convertRect:* methods.

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