将占位符添加到UITextField，如何以编程方式快速设置占位符文本? [英] Add Placeholder to UITextField, how to set the placeholder text programmatically in swift?

问题描述

我正在从数据库中提取一个电话号码，当用户开始在文本字段中进行编辑以更改该电话号码时，我想使用数据库中当前的号码作为占位符.由于此信息随每个用户而变化，因此如何以编程方式快速设置它?

I'm pulling out a phone number from a database, and when the user begins editing in the text field to change that phone number I'd like to use the number I currently have in the database as the placeholder. Since this information changes with each user, how can I set it programmatically in swift?

推荐答案

您需要先从数据库中获取电话号码(将其转换为String)，然后将textField的placeholder设置为该String，像这样

You need to get the phone number from your database first (convert them to String), then you set placeholder of your textField to that String, like so

 textField.placeholder = phoneNumberString

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