swift2

问题 I am setting some attributed text to textview, and giving line. I am trying to set baseline alignment vertically center but unable to set that. How can I set the text vertically center in textview. 回答1: First add/remove an observer for the contentSize key value of the UITextView when the view is appeared/disappeared: override func viewWillAppear(animated: Bool) { super.viewWillAppear(animated) textView.addObserver(self, forKeyPath: "contentSize", options: NSKeyValueObservingOptions.New,

问题 i was having this issue (UICollectionView inside of UITableViewCell - AutoLayout) and after trying several solution which are available in the internet i came with this @Pablo Romeu's answer i tried his solution , now i got a TableView with collectionView cells in it (which can dynamically change its size according to content in it) but when am scrolling through my tableview its getting crashed with this error : 2016-06-13 22:05:51.546 WishMeluck[3507:425240] the behavior of the

问题 I am adding a keyboard observer to adjust the view height when the keyboard shows. But when the text field is at the top of the view and the keyboard shows, the text field goes up even more. Can someone please guide me on how to fix this properly because after performing lots of searches, they all suggest the same thing. I am using iOS 9 on an iPhone 5. Here is my code. In viewDidLoad() : //SET OBSERVER WHEN KEYBOARD IS SHOWN NSNotificationCenter.defaultCenter().addObserver(self, selector:

问题 Given the following objective c code Class className = NSClassFromString(@"EKAttendee"); id attendee = [className new]; what would the swift code be? 回答1: Here is a simple example that shows how to use NSClassFromString : if let clazz = NSClassFromString("NSView") as? NSView.Type { let v = clazz.init(frame: NSRect(x: 0, y: 0, width: 100, height: 100)) print(v.frame) // (0.0, 0.0, 100.0, 100.0) } 回答2: Try https://objectivec2swift.com/#/converter/code I copied this into it Class className =

问题 Given the following objective c code Class className = NSClassFromString(@"EKAttendee"); id attendee = [className new]; what would the swift code be? 回答1: Here is a simple example that shows how to use NSClassFromString : if let clazz = NSClassFromString("NSView") as? NSView.Type { let v = clazz.init(frame: NSRect(x: 0, y: 0, width: 100, height: 100)) print(v.frame) // (0.0, 0.0, 100.0, 100.0) } 回答2: Try https://objectivec2swift.com/#/converter/code I copied this into it Class className =

问题 When looping through an array and printing each item in the Playground, the output is (x times) . Where x is the count. Rather than the count, is there a way to make the Playground output each item? 回答1: In the Playground, go to menu View > Debug Area > Show Debug Area it will show the console where you'll be able to see the result of print . 来源： https://stackoverflow.com/questions/32804500/printing-each-array-item-in-xcode-playground

问题 I am trying to figure out how get the correct height for my tableview cell that contains a uitextview so that all the content in the uitextview will be display. The textview is not editable and not scrollable, which means that the string for the uitextview is known. I tried simply returning the height of the tableview cell that is in the storyboard in heightForRowAtIndexPath but that cuts off the content if it is too large. I also tried calculating the height for the textView in

问题 I wrote in Swift 1.2 the next: self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil) but now, in Swift 2 it prints me the next error: Could not find member 'Forward' How can I fix it? 回答1: You should make sure that your viewControllers not optional Type. Such as: var viewControllers:[UIViewController] = [VC1,VC2] self.pageViewController.setViewControllers(viewControllers, direction:

问题 I wanted to integrate below functionality : I am passing one contact number of a user. If that contact number already exists, directly opens that user's chat screen when I press on WhatsApp button in my app. If that contact does not exist in the address book, then first, store this contact in the address book and then open that contact's chat screen in WhatsApp (with refreshing contacts so I will get the name of that person on WhatsApp chat screen). I have done below task: If contact does not

问题 I wanted to integrate below functionality : I am passing one contact number of a user. If that contact number already exists, directly opens that user's chat screen when I press on WhatsApp button in my app. If that contact does not exist in the address book, then first, store this contact in the address book and then open that contact's chat screen in WhatsApp (with refreshing contacts so I will get the name of that person on WhatsApp chat screen). I have done below task: If contact does not