Is there an up to date swift solution for making a UITextField placeholder disappear, or the cursor to be brought to the front as soon as a user clicks in the field, rather than when they start typing. I tried some of the solutions from older posts, and I tried the code below, but it doesn't seem to have the desired effect. Any help much appreciated.Is there an up to date swift solution for makin
阅读背景：
当单击swift时，UITextField隐藏占位符文本或将光标移到前面。
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