Xcode 12.0 Beta Missing autocompletion for classes which adopts a protocol

Question

Created Jun ’20

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Usually I write a subclass of NSObject which implements UITableViewControllerDataSource and start to write number which leads to an autocomplete with suggestions from mentioned protocol but in Xcode12 the autocomplete returns empty list.

STR:

move a cursor to body of class CountriesTableDataSource
start to write "numb" which should lead to an autocomplete list of methods from UITableViewDataSource

Code Block class CountriesTableDataSource: NSObject, UITableViewDataSource {
    let data = Locale.isoRegionCodes.map {			Locale.current.localizedString(forRegionCode: $0) }
}

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Answer 1

Developer Tools Engineer OP

Apple

Jun ’20

Thanks for reporting this issue! It appears to be related to code-completion being after the trailing closure.

In the meantime, you can get the table view methods by adding the func keyword and a space before doing code-completion, such as:

Code Block swiftclass CountriesTableDataSource: NSObject, UITableViewDataSource {
    let data = Locale.isoRegionCodes.map {      Locale.current.localizedString(forRegionCode: $0) }
 		func <complete-here>

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