问题
I recently updated Xcode to the new 7.0 beta.
I did the migration with the assistant but there are a few more issues.
func saveContext () {
if let moc = self.managedObjectContext {
var error: NSError? = nil
if moc.hasChanges && !moc.save() {
NSLog("Unresolved error \(error), \(error!.userInfo)")
abort()
}
}
}
On line 4 there are 4 issues: the first one is:
Binary operator '&&' cannot be applied to two Bool operands
the second one is:
Call can throw, but it is not marked with 'try' and the error is not handled
Can someone please help me?
回答1:
Here is some code that should do the trick. Remember to preceed throw statements with try and catch them.
func saveContext () {
if let moc = self.managedObjectContext {
if moc.hasChanges {
do {
try moc.save()
} catch {
NSLog("Unresolved error \(error)")
abort()
}
}
}
}
来源：https://stackoverflow.com/questions/30822070/binary-operator-cannot-be-applied-to-two-bool-operands