问题
When I assign my textfield's placeholder value in the attributes inspector, it won't show in the storyboard, however, when I run a simulator of the application is is there. Is there a setting I'm missing? I just want to be able to see the placeholder text in the editor. Below is a screenshot of xcode and one of the simulator
回答1:
I am having the same issue, fortunately I run a MacBook with Xcode 9.1(9B55) and an iMac with Xcode 9.2(9C40b)
On my MacBook all placeholders show up but on iMac they don't. So the issue is with xCode 9.2 running High Sierra.
来源：https://stackoverflow.com/questions/47719530/xcode-wont-show-my-textfield-placeholder-text-in-storyboard