ios7

问题 Apple since iOS7 ha deprecated and unavailable the use of the property -uniqueIdentifier . The other properties -identifierForVendor and -advertisingIdentifier have the big problem that they change the value after uninstalling and reinstalling the app. I need that value to identify uniquely the device connected to the server. The app will be distributed only internally using an enterprise account, so no problem for the review process. Is there a private a method to get it? [UPDATE WITH SOME

问题 I'm building a game with balls bouncing within the iPad's screen. Similar to a Pong game. I see that SKScene's SKPhysicsWorld has gravity property, and also controls how objects collide with each other. Is there some way I can automatically detect if a sprite's edge has collided with the screen's edge, so it can bounce off that? Or do I need to write my own collision code? 回答1: You don't need to write much code to make the ball bounce off the edge of the screen. the physics environment can

问题 The requirement is to split the PDF in to individual page, retaining the individual file as .pdf extension only. The files which are created in /CreatedPDF Folder are not getting opened Please help in figuring/correcting this issue. //"fileURL" is the original File which has to be broken //"pages" is the number of pages in PDF NSInteger pages = CGPDFDocumentGetNumberOfPages(pdfDocReference); for (int page = 1; page <= pages; page++) { NSFileManager *fm = [NSFileManager defaultManager];

问题 I have Reachability working exactly as suggested as in this thread. I am using the open source Reachability. However I am not using blocks but notifications, hence the process is pretty similar to the Apple's Reachability code. The first time I start the app, I run this and it works great. Reachability *reachability = [reach hostReachability]; [reachability startNotifier]; The reachabilityChanged: event is firing: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector

问题 I have a UITextField that is added to a view and I'm trying to change it's default appearance. What I want is to change the corner radius, but only on top / bottom. I'm doing so by doing this: UIBezierPath *usernameMaskPathWithRadiusTop = [UIBezierPath bezierPathWithRoundedRect:username.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(4.0, 4.0)]; UIBezierPath *passwordMaskPathWithRadiusBottom = [UIBezierPath bezierPathWithRoundedRect:password.bounds

问题 I'm having a problem handling rotation in a view controller. When the view is topmost and the phone is rotated, it adapts correctly. When there's a view controller being presented modally over it and the device is rotated, the view controller under is not fully updated for the rotation when the user returns. The biggest problem I appear to be having is that the separator lines don't expand to fill the whole width. Example: I've uploaded my test project to GitHub; you can clone it from https:/

问题 I am using JASidePanels in my app and everything is so far so good. My design team have come up with a UI design like this, when the side panel is shown or revealed, But I am able to reproduce like! this. What all I have tried so far: I tried setting the center panels background color to the image that I have in the right panel - No luck. I tried setting the sidePanel.view.backgroundColor and also tintColor - No luck. Any help is appreciated! 回答1: This is JASidePanels's bug , however they

问题 I have a uiviewcontroller which loads a uiwebview. When the uiviewcontroller loads the uiwebview everything is done correctly. But when one navigates away and returns back and the uiwebview is not loaded, it is displayed differently. The uiwebview scrollview's contentsize height changes by 64px, it gets higher. When it is loaded for the first it looks like this When one returns back to the view, this is what happens I hope I was able to make my problem understandable. If more details are

问题 Since currently it is not possible to set the color to of a SKScene to clearColor , by doing -(id)initWithSize:(CGSize)size { if (self = [super initWithSize:size]) { self.backgroundColor = [SKColor clearColor]; } return self; } As seen here: LINK Then how can one set the background image for a SKScene ? Please be as specific as possible, sample code would be great! 回答1: Use an SKSpriteNode centered in the scene: -(id)initWithSize:(CGSize)size { if (self = [super initWithSize:size]) { //

问题 My application has a dark background, but in iOS 7 the status bar became transparent. So I can't see anything there, only green battery indicator in the corner. How can I change the status bar text color to Green or Orange like it is on the home screen? I know about Set the UIViewControllerBasedStatusBarAppearance to YES in the plist In viewDidLoad do a [self setNeedsStatusBarAppearanceUpdate]; Add the following method: -(UIStatusBarStyle)preferredStatusBarStyle{ return