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I have only one large project write with swift 3.2 and use Xcode 9.1 to open it. But I can't use function "Jump to definition" of Xcode, it only show question mark (?). The other project can "Jump to definition". How can I fix it? Very thanks.

Tien-Nvan
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    This usually happens when the indexing is not done yet or has stopped because of an error. You may want to try cleaning the project - maybe even cleaning the derived data. Search how to do this there's many explanations. – Eric Aya Nov 21 '17 at 09:29
  • Sometimes restarting Xcode and a clean build can solve the problem as well. – chengsam Nov 21 '17 at 15:12
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    if I open in xcode 8.3.3, "Jump to definition" will work, but xcode 9.1 doesn't – Tien-Nvan Nov 29 '17 at 05:01

2 Answers2

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Go to Preferences->Navigation->Command-click on Code:->Jump To Definition

See the image

enter image description here

Jonathan Porter
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Max Soiferman
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Force Quit Xcode -> Start Xcode -> Clean Build Folder

Let the indexing finish and files getting processed.

Run the build again.

Vishal Bhogal
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