Direct application in Xcode preview UI

Select UI Preview

Do app using Xcode application development time,UI interface design what application is commonplace,But every time and then run the simulator to view the output of a very troublesome thing,Especially when you need to modify many elements、And the need to fit a variety of screen sizes with the time - after all,,Now iPhone product line is no longer so a single。

So,Breath simulator run three or four such things fear[……]

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