swift

问题 Although I've searched, I'm confused about how best to approach this. I have a tableView where the bottom cell is an input to the list, in the same way apple reminders work. When there are too many items on the list, the keyboard covers the list and I can't see what I'm typing. My thought it I need to change the physical size of the table view and ensure it is scrolled to the bottom when the keyboard shows. Some have said keyboard observers but the majority of code I've found for this is out

问题 Although I've searched, I'm confused about how best to approach this. I have a tableView where the bottom cell is an input to the list, in the same way apple reminders work. When there are too many items on the list, the keyboard covers the list and I can't see what I'm typing. My thought it I need to change the physical size of the table view and ensure it is scrolled to the bottom when the keyboard shows. Some have said keyboard observers but the majority of code I've found for this is out

问题 Although I've searched, I'm confused about how best to approach this. I have a tableView where the bottom cell is an input to the list, in the same way apple reminders work. When there are too many items on the list, the keyboard covers the list and I can't see what I'm typing. My thought it I need to change the physical size of the table view and ensure it is scrolled to the bottom when the keyboard shows. Some have said keyboard observers but the majority of code I've found for this is out

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 in SpriteKit we detect the in the didBeginContact method. but this looks a bit stupid to do something like that: func didBeginContact(contact: SKPhysicsContact) { if let contactA = contact.bodyA.node?.name { if let contactB = contact.bodyB.node?.name { //now that we have safely unwrapped these nodes, we can operate on them if contactA == "ball" { collisionBetweenBall(contact.bodyA.node!, object: contact.bodyB.node!) } else if contactB == "ball" { collisionBetweenBall(contact.bodyB.node!,

问题 Can you use a NavigationLink as a Menu 's item in swiftUI? It seems to do just nothing: Menu { NavigationLink(destination: Text("test1")) { Text("item1") } NavigationLink(destination: Text("test2")) { Text("item2") } } label: { Text("open menu") } In case it is meant to not work as tried above, is there an alternative way of achiving the intended reult? 回答1: NavigationLink should be inside NavigationView hierarchy. The Menu is outside navigation view, so put buttons inside menu which activate

问题 I am using Firebase Database and am attempting to retrieve and use data using NSObject. I am receiving a NSUnknownKeyException error when running the app causing it to crash. NSObject: class WatchList: NSObject { var filmid: Int? } Firebase Code: ref.child("users").child(uid!).child("watchlist").observe(DataEventType.childAdded, with: { (info) in print(info) if let dict = info.value as? [String: AnyObject] { let list = WatchList() list.setValuesForKeys(dict) print(list) } }, withCancel: nil)

问题 I've used UISearchController. When I click on the search bar, navigation bar hides and search bar goes to the top of the screen. But, it shows extra space between top of the screen and the search bar How do I change statusBar color to default searchBar gray color ? StatusBar font colour is white, hence when user click search bar, auto above status bar information becomes invisible.So i just need to cover that area by default gray color too, then user can see clearly the status bar.Like this