我似乎无法覆盖 UITextField leftViewRectForBounds 方法

发布于 2024-10-23 23:31:42 字数 914 浏览 5 评论 0原文

大局观：这就是我正在努力实现的目标。向某人发送短信。 UI/UX 应该与此类似：在此处输入图像描述

因此，目前我正在使用带有 3 个单元格的 UITableView。前两个（“收件人：”和“发件人：”）高 44 像素。我将 UITextField 放入 UITableViewCell 的“contentView”内。一切都很好。我可以让用户编辑单元格的内容。

现在，我使用 leftView 属性来显示带有文本“To:”的 UILabel。它有效，但“收件人”标签始终位于 UITextField 的最左侧（如下图所示）：在此处输入图像描述

因此，根据 SDK 文档。左视图模式由以下方法决定： leftViewRectForBounds：

根据讨论：

您不应该调用此方法直接地。如果您想放置左覆盖视图在不同的位置，您可以重写此方法并返回新的矩形。

因此，我尝试覆盖但没有取得太大成功。如果有人有任何代码片段，我将不胜感激。在下图中，我将“From”设置为“From”，这有点“破解”它，但我想正确地做到这一点。这就是我尝试过的：

// override leftViewRectForBounds method:
- (CGRect)leftViewRectForBounds:(CGRect)bounds{
    CGRect leftBounds = CGRectMake(bounds.origin.x + 30, 0, 45, 44);
    return leftBounds;
}

以及它的小变体，但它似乎不起作用，因此感谢任何帮助。谢谢！！！

原文

Big picture: This is what I am trying to accomplish. Send a text message to someone. The UI/UX should look something similar to this:
enter image description here

So, currently, I am using UITableView with 3 cells. The first two (for "To:" and "From:") are 44px high. I put a UITextField inside the "contentView" of a UITableViewCell. Everything is good. I can get the user to edit the content of the cell.

Now, I am using the leftView property to display a UILabel with text "To:". It works but the "To" label is always on the very left of the UITextField (shown in img below):
enter image description here

So, according to the SDK documentation. The left view mode is dictated by this method:
leftViewRectForBounds:

According to the discussion:

You should not call this method
directly. If you want to place the
left overlay view in a different
location, you can override this method
and return the new rectangle.

So, I tried overriding without much success. If anyone have any code snippets, I would greatly appreciate it. In the bottom picture, I set the "From" to be " From" which is "hacking" it a little bit but I would like to do it correctly. This is what I have tried:

// override leftViewRectForBounds method:
- (CGRect)leftViewRectForBounds:(CGRect)bounds{
    CGRect leftBounds = CGRectMake(bounds.origin.x + 30, 0, 45, 44);
    return leftBounds;
}

and small variants of it and it doesn't seem to work so any help is appreciated. Thanks!!!

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浴红衣 2024-10-30 23:31:42

你可以让你的类像下面这样

@interface MyTextField : UITextField
{
   //Declare your variable  here    
}
@end

@implementation MyTextFiled

// override leftViewRectForBounds method:
- (CGRect)leftViewRectForBounds:(CGRect)bounds{
    CGRect leftBounds = CGRectMake(bounds.origin.x + 30, 0, 45, 44);
    return leftBounds;
}

使用 MyTextField 而不是 UITextField。

you could have your class something like below

@interface MyTextField : UITextField
{
   //Declare your variable  here    
}
@end

@implementation MyTextFiled

// override leftViewRectForBounds method:
- (CGRect)leftViewRectForBounds:(CGRect)bounds{
    CGRect leftBounds = CGRectMake(bounds.origin.x + 30, 0, 45, 44);
    return leftBounds;
}

Use MyTextField instead of UITextField.

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