ios

问题 Like many iOS developers, I use CoreData, and like many iOS developers that use CoreData, I have hard-to-track-down thread violation errors. I'm trying to implement a debugging strategy for throwing exceptions when the CoreData concurrency rules are broken. My attempt is below - my question is, is this valid? Will it produce false positives? Summary: when an NSManagedObject is created, note the thread. Whenever a value is accessed later on, check if the current thread is the same as the

问题 I have a class set up as follows: class SettingsController: UITableViewController { I would like to be able to add constraints to the UITableView so that there is equal spacing either side of the table (it is currently a full width table, so a little ugly on iPad). I have read that I can't add constraints to a UITableViewController , and instead I must add a UIViewController to my class, add a UITableView to that, and then I should be able to add the constraints to the TableView. I've amended

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 I resume my CABasicAnimation with the following code: CFTimeInterval pausedtime = layer.timeOffset; layer.speed = 1.0; layer.timeOffset = 0.0; layer.beginTime = [layer convertTime:CACurrentMediaTime() toLayer:nil] - pausedTime; which is pretty straightforward. At the very end of this article the author states that with negative speed value animation reverses. I can't understand what timeOffset and beginTime should look like in this case? P.S. I am aware that I can reverse animation by

问题 I did a lot of research but didn't got any help. I am unable to add capability of 'Siri' in xcode and can't see any option in my apple developer account too, I am asked to purchase the membership instead. By any chance is it possible to create an app in iTunesConnect without making the payment of USD99. I just want to learn some new stuffs like Siri integration, but to do so I need to add the capability in app from developer account and to add an app I have to get enrolled and pay $99. Even

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . Improve this question Is it possible to establish a communication between an OSX (or Windows) Application, and an iOS App, via USB ? I just want my 2 App to be able to communicate with each other, read and write packets... I don't want to use WiFi Is there an "easy way" to do that

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

问题 I tested my app on iPhone and iPad devices and it works fine, also I tested it on iOS 10.1.1 and on IPV6 network and it also works fine but after uploading my app to the app store, it is rejected because it crashes when login if the device is offline or on Wifi. They gave me a crash report and after I symplocited it, I get thhis Info : Date/Time: 2016-11-01 10:07:03.2150 -0700 Launch Time: 2016-11-01 10:05:21.7124 -0700 OS Version: iPhone OS 10.1 (14B72) Report Version: 104 Exception Type: