ios5

问题 On Apple's website it looks like they have support for retina displays. Does it work the same way that it does on iOS with a @2x image? 回答1: There are a number of good walkthroughs on how this is done, including: http://mir.aculo.us/2012/06/26/flowchart-how-to-retinafy-your-website/ 回答2: Store your images in /img/logo.png (regular version) and /img/logo@2x.png (retina version) JS for Head-Tag var retina = 0; try { retina = Number(window.devicePixelRatio); } catch(e) {} retina = (retina > 1) ?

问题 How do I change this line with the equivalent NSRegularExpression NSString* encodedPoints = [apiResponse stringByMatching:@"points:\\\"([^\\\"]*)\\\"" capture:1L]; Thank you 回答1: Remember that you need iOS 4.0 or greater to use this: NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"points:\\\"([^\\\"]*)\\\"" options:0 error:NULL]; NSTextCheckingResult *match = [regex firstMatchInString:apiResponse options:0 range:NSMakeRange(0, [apiResponse length])]; NSString

问题 I am setting up my UITableView using storyboard editor. For creating my cells I am using the standard delegate method: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"SearchResultCell"]; if (cell == nil) { // Do cell setup } // etc return cell; } Except when the cell is dequeued the very first time it's not nil, as it should be. So the code inside the if statement is

问题 1) I cant use my iPad with iOS 5.1.1 in XCode 7.0 (7A220). In "Devices" window: "Unsupported device model: "iPad is of a model that is not supported by this version of Xcode..." 2) Is impossible to upload iOS 5 simulator to Xcode 7; the oldest available is iOS 6. What can I do to work this iPad withXcode 7? 回答1: XCode hasn't supported iOS 5 simulation for longer than that. Check my post on the thread Install ios 5 simulator to xcode 5.1? to see how I ran iOS 5 simulators on a mac with recent

问题 I've seen similar questions here, but not with a clear answer. So I have one modal login view with the classic username/password form, a Facebook login button and a Sign Up button which I would like to show when the user starts the app for the very first time. From what I found there are two ways to implement this, with shortcumings. in AppDelegate's didFinishLaunchingWithOptions a conditional is set to check if the user is logged in. If not the rootViewController is set to the

问题 I am using MapKit api to get current location on map and drawing route between two location pointed by drop pins.I also want to get all the main stands between its route. I m using below function to get route between two location - (NSArray*)getRoutePointFrom:(MyLocation*)origin to:(MyLocation*)destination { NSString* saddr = [NSString stringWithFormat:@"%f,%f", origin.coordinate.latitude, origin.coordinate.longitude]; NSString* daddr = [NSString stringWithFormat:@"%f,%f", destination

问题 I am having issue with tinting a PNG image with GLKit. I have a white PNG image that I load into the application and then use it to create a texture: UIImage *image = [ UIImage imageNamed:@"brushImage" ]; NSError *error = nil; texture_m = [[ GLKTextureLoader textureWithCGImage:image.CGImage options:nil error:&error] retain ]; if (error) { NSLog(@"Error loading texture from image: %@",error); } the texture is created with no errors. however when I want to render the texture with blend

问题 I was using this answer for how to fade out music player volume in my app, but in iOS 5, this leads to the on-screen HUD for volume appearing to the user, as if they had pressed the volume buttons on the side of their device. Does anyone know a workaround that doesn't display the HUD? 回答1: I found a solution here: applicationMusicPlayer volume notification It simply directs you to add an MPVolumeView to your view. For some reason, having that in the view hierarchy prevents the volume HUD from

问题 I was wondering if anyone could provide an example of how to take a screenshot which mixes OpenGL and UIKit elements. Ever since Apple made UIGetScreenImage() private this has become a pretty difficult task because the two common methods Apple used to replace it capture only UIKit or only OpenGL. This similar question references Apple's Technical Q&A QA1714, but the QA only describes how to handle elements from the camera and UIKit. How do you go about rendering the UIKit view hierarchy into

问题 Am developing an iPhone app. From my app user can to follow my twitter account . I want to add the Follow twitter button in my app . When the user press the button make the user to follow my twitter account. Before i didn't used any twitter api and twitter functionality so am struggling to make this. Can you please help me to follow another twitter user account from the app itself? Thanks in advance. 回答1: Without plugging into another twitter app or anything you could probably open a URL to