iphone-4

问题 I have made two different background images for my iPhone app: one in 640x960px (iPhone4s) and one in 640x1136px (iPhone5). But when I create the application layouts in the Xcode 4.5 Main Storyboard, how do I define and create it for both iPhone4s and iPhone5? So that the background automatically updates when i choose iPhone5 screen? 回答1: Just import your background image with the correct suffix For example : myImage.png for non-retina display myImage@2x.png for retina display myImage-568h@2x

问题 I had developed an ios app for ios 4.0.That was navigation based application.Now I want it also support for iPhone-5 I think I changed xib after checking device version,I am facing problem xib is changed but it's view Height is not changed.How it can possible if some else face this problem please share ideas with me.Thanks. 回答1: Set iOS 6 as the Base SDK and use the Auto Layout feature to make screens that can scale for all type of screens. You'll need Xcode 4.5 to do this. Get started with

问题 I want to check if iOS device I am using has support for Facetime call. I don't want to check the iOS version on the device, rather if the device has the hardware support to initiate a Facetime call. For example: I have an iPad 1 with iOS version 4.0 and above, but if I don't have a camera (or a front camera), the Facetime call should not initiate. How can I do this? 回答1: Try using canOpenUrl method with FaceTime scheme, as follows: [[UIApplication sharedApplication] canOpenURL: [NSURL

问题 Question : Why imagePickerController.cameraFlashMode always returns 0 on iphone 4 and returns correct values with iphone 5 ? I init my UIImagePickerController and set the cameraFlashMode to UIImagePickerControllerCameraFlashModeOn: imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; imagePickerController.mediaTypes = [NSArray arrayWithObject:@"public.image"]; imagePickerController.cameraCaptureMode =

问题 I have an working application which i have tested in my ipod touch. Everything works pretty fine. My tabbar icons and splash screen images are in a separate folder in my Resources folder Resources->images Now, I know for iPhone4 i need to use 2x images. My question is for support for iPhone4 all that i need to do is add 2x images in my images folder. For example if my splashscreen image is Default.png , I should add my 2x image as Default@2x.png in my images folder and iphone will use it

问题 Property 'Latitude' is a scalar type on class 'LatitudeLongitude'. Cannot generate a setter method for it. When I generated codes for my managed object, I got a message whether I want scalar properties for primitive data type. should I use it? I want to make this application compatible with iPhone 3 - 5 is there any issues with this problem? 回答1: When you use scalar properties you have to provide implementations of getters and setters for those properties by yourself, as described in

问题 Does anyone know how to enable the photo album button on the UIImagePickerController when its in the camera mode? Like how the camera app on on the iphone can toggle between image and video taking and also has the button to view the photo library? 回答1: I'm afraid that this can't be done in that easy way (just enable or disable some magic feature). For some simple requirement, you can use cameraOverlayView and showsCameraControls to make the implementation. If you want to switch between photo

问题 Merged with How to store text as paragraphs in sqlite database in iPhone app?. In my iPhone app, I have a requirement to store huge amount of text. I have paragraphs of text to be stored in my database along with the newline characters. What should I do to store the text as paragraphs in Sqlite database? I am a Newbie. Please Help and Suggest. Thanks For example ,I want to store paragraphs like the ones below in : (the mother of the faithful believers) The commencement of the Divine

问题 Recently I have come across a problem, where my app goes into background during initial launch, but this only happens on iPhone 4S with iOS6. I have tested on: simulator, with different hardware/software configurations iPhone 5 (iOS 6) iPhone 4S (iOS 5.1) iPad2 (iOS 6) and it is working on all of them, but on the iPhone 4S with iOS6 the launch of the app takes about 20s before going into background, if you "re-launch" the app after a couple of seconds you see that it is still running and

问题 Recently I have come across a problem, where my app goes into background during initial launch, but this only happens on iPhone 4S with iOS6. I have tested on: simulator, with different hardware/software configurations iPhone 5 (iOS 6) iPhone 4S (iOS 5.1) iPad2 (iOS 6) and it is working on all of them, but on the iPhone 4S with iOS6 the launch of the app takes about 20s before going into background, if you "re-launch" the app after a couple of seconds you see that it is still running and