ios4

问题 I am writing an iPhone app in which I want to support the largest user base possible at this point in time (with minimal pain), so I decided that targeting IOS 4.3+ would be a good subset of users for my audience. I started working in XCode 4.2, but reverted back to XCode 4.1 when I realized that the project templates had changed and everything seemed very intertwined with storyboarding, ARC, etc. I have built out my application to the point I actually want to test on my device, which has

问题 I am trying to do a certain action based on whether or not the user makes a loud sound. I'm not trying to do any voice recognition or anything. Just simply do an action based on whether the iPhone picks up a loud sound. Any suggestions, tutorials, I can't find anything on the apple developer site. I'm assuming i'm not looking or searching right. 回答1: The easiest thing for you do is to use the AudioQueue services. Here's the manual: Apple AQ manual Basically, look for any example code that

问题 I'm trying to take a screenshot of a UIView shrunk down to thumbnail size with the following code, UIGraphicsBeginImageContext(size); [canvas.layer renderInContext:UIGraphicsGetCurrentContext()]; result = [UIGraphicsGetImageFromCurrentImageContext() retain]; UIGraphicsEndImageContext(); The above code will simply grab the top left portion of the view in the original unshrunk size instead. I'm sure I've done this before, but I just can't get it working. Anyone know what's off here? 回答1:

问题 I am working on an OCR project. My first task is to take an image from iPhone camera and then locate a specific word on the image. Below is a sample image taken by my device, now I want to find the position of word "STATIONERY" and highlight it with a yellow rectangle on image. How can I do that? Do I need to first use an OCR SDK for that (like ABBYY) or can I do this otherwise? 回答1: If you need to get the coordinates of a specific word, of course you need to perform OCR first. Keep in mind

问题 Is there any method to get to Manage Subscriptions in settings by clicking a button from my app?? 回答1: There is no way to access the settings app from inside a sandboxed app -- i.e. any apps but Apple's -- without using a private API. 回答2: you can open Subscription section of AppStore by opening this link in iphone/ipad safari: https://buy.itunes.apple.com/WebObjects/MZFinance.woa/wa/manageSubscriptions or simply use this code: [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@

问题 How can I send an image along with text, which is in the form of tabular data, in an email from within my app? Please help and make suggestions. Thanks. 回答1: - (void)sendMailWithImage:(UIImage *)image { if([MFMailComposeViewController canSendMail]) { MFMailComposeViewController *mailController = [[MFMailComposeViewController alloc] init]; if(mailController!=nil) { mailController.mailComposeDelegate = self; NSData *imageData = UIImagePNGRepresentation(image); [mailController addAttachmentData

问题 I am getting the error even if I create a new project ... This is the new 4.2 SDK : iOS 5 beta 3 CompileStoryboard testing/en.lproj/MainStoryboard.storyboard cd /Users/omkarjadhav/Desktop/testing setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" setenv XCODE_DEVELOPER_USR_PATH /Developer/usr/bin/.. /Developer/usr/bin/ibtool --errors --warnings --notices --output-format human-readable-text --compile /Users/omkarjadhav

问题 For iPhone 4 , a lot API can not be used any more. I am looking for alternative solution for UIImageWriteToSavedPhotosAlbum. ALAssetsLibrary is current solution from Apple in new iOS 4. Anyone has experience for that and can give some samples, or open source projects ? Thanks 回答1: you need to do something like this - ALAssetsLibrary* library=[[ALAssetsLibrary alloc] init] ; // Request to save the image to camera roll [library writeImageToSavedPhotosAlbum:img.CGImage orientation:

问题 I am using iFrameExtractor to extract the frames. But when I clone the project I found that few files from ffmpeg framework was missing. I tried hard to include the missing file, but was not able to do that.. Can anyone sort out this issue or give me the link of FrameExtractor class which contains all the lib files of FFMpeg . I downloaded the project from this link but when i open the project i gets the following missing file in the image.! This are the missing files 回答1: Well you could have

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I am wondering what the best practice is in iOS development when it comes to building the UI for a particular screen. Since it is