Convert to Swift3 error

Question

After Xcode conversion to Swift 3.0 syntax, I got the following error:

error: cannot invoke initializer for type 'Int' with an argument list of type '(qos_class_t)' DispatchQueue.global(priority: Int(DispatchQoS.QoSClass.userInitiated.rawValue)).async { ^

note: overloads for 'Int' exist with these partially matching parameter lists: (Int64), (Word), (UInt8), (Int8), (UInt16), (Int16), (UInt32), (Int32), (UInt64), (UInt), (Int), (Float), (Double), (Float80), (String, radix: Int), (CGFloat), (NSNumber) {DispatchQueue.global(priority: Int(DispatchQoS.QoSClass.userInitiated.rawValue)).async {

Syntax after conversion :

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) { if searchText == "" { self.filteredSymbols = self.symbols self.alphabeticSymbolCollection.reloadData() } else { DispatchQueue.global(priority: Int(DispatchQoS.QoSClass.userInitiated.rawValue)).async { let fs = self.filterContentForSearchText(searchText) DispatchQueue.main.async { self.filteredSymbols = fs self.searchActive = true self.alphabeticSymbolCollection.reloadData() } } } }

Syntax before conversion :

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) { if searchText == "" { self.filteredSymbols = self.symbols self.alphabeticSymbolCollection.reloadData() } else { dispatch_async(dispatch_get_global_queue(Int(QOS_CLASS_USER_INITIATED.rawValue), 0)) { let fs = self.filterContentForSearchText(searchText) dispatch_async(dispatch_get_main_queue()) { self.filteredSymbols = fs self.searchActive = true self.alphabeticSymbolCollection.reloadData() } } } }

Possible duplicate of How do I dispatch_sync, dispatch_async, dispatch_after, etc in Swift 3? — Hamish
– Hamish, Commented Mar 12, 2017 at 11:44

vadian · Accepted Answer · 2017-03-12 07:17:12Z

1

It's simply

DispatchQueue.global(qos: .userInitiated).async { }

answered Mar 12, 2017 at 7:17

vadian

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