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UITextField 清除按钮带有占位符错误？

发布于 2024-10-17 12:09:06 字数 124 浏览 2 评论 0原文

我有一个 UITextField，其clearButton 属性设置为“编辑时”。文本字段右对齐。当我专注于要编辑的文本字段时，占位符文本不会移动，因此插入符号会闪烁，并且一半的占位符文本会被擦除。

有人有解决方法吗？

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鲜血染红嫁衣 2024-10-24 12:09:06

我刚刚遇到了完全相同的问题！对我来说，它确实看起来像一个错误——为清除按钮保留的区域将占位符夹到了右侧。
我发现的解决方法是将清除按钮样式更改为“始终”，这是一个用词不当，因为实际上当占位符可见时（即当文本为空时），清除按钮仍然不显示：

textField.clearButtonMode = UITextFieldViewModeAlways;

它确实意味着占位符未完全向右对齐（为清除按钮留出空间，即使它不存在），如果确实显示了清除按钮，那就太好了！可以通过某种方式确保 UITextField 始终包含空格而不是空白来解决此问题，从而强制清除按钮始终（这意味着始终！）显示。

I've just hit the exact same issue! It does look like a bug to me -- the area reserved for the clear button clips the placeholder to the right.
The workaround I've found it to change the clear button style to "always", which is a misnomer as in fact the clear button still isn't displayed when the placeholder is visible (i.e. when the text is empty):

textField.clearButtonMode = UITextFieldViewModeAlways;

It does mean that the placeholder isn't aligned fully to the right (leaving space for the clear button, even though it's not there), which would be fine if the clear button was indeed displayed! This can be fixed by somehow ensuring the UITextField always contains a space instead of a blank, thus forcing the clear button to always (and that means always!) display.

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千里故人稀 2024-10-24 12:09:06

我遇到了同样的问题，我使用文本字段委托方法解决了管理buttonMode（在我的例子中我使用自定义rightView）。具体来说，我实现了这些：

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    if (textField.text.length == 0) {
        textField.rightViewMode = UITextFieldViewModeNever;
    } else {
        textField.rightViewMode = UITextFieldViewModeAlways;
    }
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    if (textField.text.length == 0) {
        textField.rightViewMode = UITextFieldViewModeNever;
    } else {
        textField.rightViewMode = UITextFieldViewModeAlways;
    }
}

- (void)textFieldDidChange:(UITextField *)textField
{
    if (textField.text.length == 0) {
        textField.rightViewMode = UITextFieldViewModeNever;
    } else {
        textField.rightViewMode = UITextFieldViewModeAlways;
    }
}

textFieldDidChange: 方法是我为 UIControlEventEditingChanged 控件事件添加到 UITextField 的自定义操作。

I had the same problem and I solved managing the buttonMode (in my case I'm using a custom rightView) using the textfield delegate methods. In details I implemented these:

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    if (textField.text.length == 0) {
        textField.rightViewMode = UITextFieldViewModeNever;
    } else {
        textField.rightViewMode = UITextFieldViewModeAlways;
    }
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    if (textField.text.length == 0) {
        textField.rightViewMode = UITextFieldViewModeNever;
    } else {
        textField.rightViewMode = UITextFieldViewModeAlways;
    }
}

- (void)textFieldDidChange:(UITextField *)textField
{
    if (textField.text.length == 0) {
        textField.rightViewMode = UITextFieldViewModeNever;
    } else {
        textField.rightViewMode = UITextFieldViewModeAlways;
    }
}

The textFieldDidChange: method is a custom action that I added to the UITextField for the UIControlEventEditingChanged control event.

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