xcode4

问题 I am making a password app that stores user logins/password etc for credit card, bank info etc into a plist file. I have googled and I know how to encrypt and decrypt a string using AES encryption with key. I got that to work for simple login and password. I encrypt and save the login and password to NSdata and then decrypt and read it - (NSData *)AES256EncryptWithKey:(NSString *)key; - (NSData *)AES256DecryptWithKey:(NSString *)key; - (NSData*) encryptString:(NSString*)plaintext withKey:

问题 I'm doing something wrong. I have added an expression, I can see the expression with the "E" symbol in the Debug area, but the expression is not being evaluated, its value is not displayed there (it is in scope at that time). When I use the debugger (lldb) directly, it works well. Xcode 4.3.2. What should I do? Thanks 回答1: You are trying to evaluate a boolean and print it as an object. You want to use print [self isEditing] or print (BOOL)[self isEditing] , depending upon whether the debugger

问题 I want to create an iPhone application which will display notification that an incoming call is being forwarded from an outside line, to my iPhone. Purpose being, I have 3 separate office land lines that forward calls to my cell phone after hours and I would like to know from which they are coming from. is there any possible way ? Kindly help,thanks in advance. 回答1: On an unjailbroken phone, you cannot interfere with incoming calls in any way. On a jailbroken phone, your ability to do this

问题 I still can't get the idea that when I create a new Group in XCode, and build the project, and then return back to finder and notice that the group does not exist but any file to be created under this group will appear in the project's directory in finder but that file is alone without being under any group. (note: I'm not talking about this directory: /Users/ username /Library/Application Support/iPhone Simulator/4.3/Applications/ uuid /...) 1) can anyone explain why project's directory

问题 I'm trying to submit my iOS app to the App Store, I have followed the necessary steps found here, https://developer.apple.com/legacy/library/technotes/tn2250/_index.html#//apple_ref/doc/uid/DTS40009933, archived, validated and submitted it to Apple whiteout any errors. The issue appears when I try to build my application for my iPhod touch where I get the following warning: Application failed codesign verification. The signature was invalid, or it was not signed with an iPhone Distribution

问题 So I have looked over a bunch of other questions that could possible be duplicates. But none of the solutions that have been mentioned seem to work. Also, the answers tend to be scattered and incomplete. So, I have a UIView inside of a subclassed UIScrollView. All I need to do is have the UIScrollview ignore all forms of gesture that can occur with 3 fingers and, instead, pass it on to the UIView inside. Could someone help me with this. 回答1: You need to subclass the scrollview to accomplish

问题 I tried compile program with MagicalRecord and I have error I do not know how resolve this problem in older sdk every thing is ok. 回答1: you don't need the special case. @autoreleasepool will work for all iOS versions. this is a compiler feature, not an iOS feature. this is assuming you are using xcode 4.2. If you have an earlier version of xcode, @autoreleasepool is not available. 来源： https://stackoverflow.com/questions/8069570/autoreleasepool-make-errors

问题 I am comparing the run of multiple projects using the Xcode simulator. Each time I go to build in one project after having run one of the other projects Xcode tells me that it cannot perform the build and run because the simulator is in use. I then have to find the other project window, stop the run in the simulator (Cmd-.) and then switch back to the previous window and rebuild. Can I make a single keyboard shortcut to stop the current run in the simulator, build and run the current project

问题 I have an application with based of UITabBarController , and inside one of the tabs I have UITableViewController to display "products", till here everything is working perfectly. Now I want when clicking one of the cells inside the UITableViewController to open a UINavigationController to display UIViewController with details of that product. I think the application hierarchy should be like the following: UITabBarController (BASE) Level-1 | |___ UITableViewController (PRODUCTS) Level-2 | |___

问题 I made this cool pie chart and now I'd like to drop a shadow under it. Is there anyway I can do it with DrawRect ? I'd like to do it right under the pie chart (drawn using DrawRect). Suggestions are welcome 回答1: Have a look at BNPiechart here - http://bynomial.com/blog/?p=104 . The code is open source.You can use it directly.If you do not want to use the library, you can refer the code for creating the shadow. 来源： https://stackoverflow.com/questions/9367727/drop-shadow-in-drawrect