ios4

问题 I'm developing a Voip application. When I press the lock button(app goes to sleep), and the server sends a request I present a local notification. The local notification is presented as it should and The button slider text says "slide to answer". If I slide here, the app gets open. However, if now I press again the lock button, and then unlock, the notification is still presented and the slider text has changed to "slide to unlock". Now, when I slide to unlock, it's as if I pressed the "close

问题 I am creating an iPhone app in which I am providing a call feature with the help of which a user can call place a call on a specified number. I am able achieve the above feature via open URL. Now after completion of the call I want to resume the execution of app automatically. Although a user can make a fast app switch in iOS 4.0. but I want this to be done automatically. I have seen the same behavior in "TomTom" app but I am not sure how this app has achieved it. Thanks Sandy 回答1: Apple does

问题 I am creating an iPhone app in which I am providing a call feature with the help of which a user can call place a call on a specified number. I am able achieve the above feature via open URL. Now after completion of the call I want to resume the execution of app automatically. Although a user can make a fast app switch in iOS 4.0. but I want this to be done automatically. I have seen the same behavior in "TomTom" app but I am not sure how this app has achieved it. Thanks Sandy 回答1: Apple does

问题 I am getting following error when I am running my application on iPod touch (version 4.2.1). My app crashes after a point: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib (file not found). My XCODE version is 3.2.6 with IOS 4.3 and my deployment target version is 4.2. Any reason why this is so happening? 回答1: Sometimes I have similar problems, and what works for me is Clean and Build the

问题 Here is the code from the nsdate formatter... for some reason the value dateSelected is incorrect... instead of "April 30 2011 7:55PM" it returns 2011-05-01 02:55... any idea what am i doing wrong? NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init]; [outputFormatter setDateFormat:@"h:mm a"]; objEventInsert.eventtime = [outputFormatter stringFromDate:self.datePicker.date]; NSLog(@"%@",objEventInsert.eventtime); NSDateFormatter *dateForm = [[NSDateFormatter alloc] init];

问题 Is it still possible to create an app for iOS 4.2.1 (or lower)??? The reason for this question is that Whatsapp is not available anymore for iOS < 4.3. This is what Whatsapp sais about this: The latest version of WhatsApp for iPhone requires iOS 4.3 or later. Regretfully, Apple does not allow new app updates to be compatible with both iOS 6 and older versions of iOS, effectively ending support for iPhone 3G and the original iPhone. Because of Apple's policy change to new App Store submissions

问题 The following constant is deprecated in iOS 4.2 ADBannerContentSizeIdentifier320x50 So for an app that is already released will this be a problem in future OS versions. In iOS 4.2 they introduced ADBannerContentSizeIdentifierPortrait If I want to support both iOS 4.0 and iOS 4.2 how should I go about it. 回答1: You'll have to put in checks whether the constants are available or not. Here's one solution Class cls = NSClassFromString(@"ADBannerView"); if (cls) { if (

问题 I want to convert some html page into PDF format.Is it possible using iPhone SDK? Are there any APIs or 3rd party libraries available to so? I have googled around for the solution but was not able to find any substantial material. Cheers 回答1: I created a class based on every good advice I found around. I've been digging a lot and I hope my class will offer some good start for anyone trying to create multi-page PDF directly out of some HTML source. You'll find the whole code here with some

问题 What I'm trying to accomplish is the following: I need to limit the amount of core data entries to 50. So if the user enters their 50th entry then the app would delete the oldest entry and add the new entry to the top of the stack. So basically, if the user never deletes entries and if there are 50 entries in core data then, when the user tries to add a new entry, the app would delete the oldest entry and add the user's new entry. Basically, I'm trying to have a history sort of thing but I

问题 I am implementing a client based application. In that I have an xml string. I need to convert it to JSON format and send to the server. I have no idea on converting this. Can you guys please suggest me any documentation or idea to this? 回答1: Step #1: Read XML into NSDictionary: http://troybrant.net/blog/2010/09/simple-xml-to-nsdictionary-converter/ Step #2: Convert NSDictionary into JSON: http://code.google.com/p/json-framework/ 回答2: As Steve said the two steps are those, I leave you a bit of