cocoa

问题 Apple has decreed that all applications submitted to the Mac App Store must be sandboxed, starting in November. Ok, but how can I "sandbox" my app? I found the official Apple's guide Code Signing And Application Sandboxing Guide. This document lists the following steps: 1) "Enable sandboxing for your application." Ok, easy: I have to open Xcode 4, select the project, select the target, go to the Summary tab and check: "Enable Entitlements" "Enable App Sandboxing" ...and every single

问题 I have another question dealing with app sandboxing. So I need access to the users' home directory and at the same time the app should be able to shut down the Mac. This requires to not using sandboxing. My problem is that I don't know how to remove sandboxing and being able to submit the app to the Mac App Store. I think that the archives are sandboxed because I had turned it on once.. How to remove sandboxing from the archives properly? Thanks for your help! 回答1: If I understand what you

问题 I have a small problem with the core data application i'm currently writing. I have two differents models, contexts and peristent stores. One is for my app data, the other one is for a website with relevant infos to me. Most of the time, I match exactly one record from my app to another record from the other source. Sometimes however, I have to fallback to fuzzy string matching to link the two records. I'm trying to match song titles. My local title could be the (made up) "The French Idealist

问题 Is there a way to determine if a class is suitable as a key and will work as you expect, for example I want to use NSIndexPath as a key in NSDictionary but I don't know for certain if two different NSIndexPath instances with the same integer values will always return the same hash value. 回答1: Apple's NSObject's isEqual document says: If two objects are equal, they must have the same hash value. This last point is particularly important if you define isEqual: in a subclass and intend to put

问题 Is there a way to determine if a class is suitable as a key and will work as you expect, for example I want to use NSIndexPath as a key in NSDictionary but I don't know for certain if two different NSIndexPath instances with the same integer values will always return the same hash value. 回答1: Apple's NSObject's isEqual document says: If two objects are equal, they must have the same hash value. This last point is particularly important if you define isEqual: in a subclass and intend to put

问题 Is there a possible way to autorotate the device orientation to portrait when the current orientation of the device is faceup or facedown? 回答1: You can use this trick to make the system refresh your controller orientation anytime you want: [self presentViewController:[UIViewController new] animated:NO completion:NULL]; [self dismissViewControllerAnimated:NO completion:NULL]; This will call supportedInterfaceOrientations on your controller. Just return UIInterfaceOrientationMaskPortrait when

问题 Is there a possible way to autorotate the device orientation to portrait when the current orientation of the device is faceup or facedown? 回答1: You can use this trick to make the system refresh your controller orientation anytime you want: [self presentViewController:[UIViewController new] animated:NO completion:NULL]; [self dismissViewControllerAnimated:NO completion:NULL]; This will call supportedInterfaceOrientations on your controller. Just return UIInterfaceOrientationMaskPortrait when

问题 I want to grab text from a list of web pages. I've done a bit of experimenting and found that the best way for my needs is via WebKit. Once the source of the page has been grabbed, I want to strip out all the HTML tags, by using the technique in this comment. Here's my code: - (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame { if(frame == [sender mainFrame]) { NSString *content = [[[[sender mainFrame] dataSource] representation] documentSource]; NSXMLDocument

问题 I want to grab text from a list of web pages. I've done a bit of experimenting and found that the best way for my needs is via WebKit. Once the source of the page has been grabbed, I want to strip out all the HTML tags, by using the technique in this comment. Here's my code: - (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame { if(frame == [sender mainFrame]) { NSString *content = [[[[sender mainFrame] dataSource] representation] documentSource]; NSXMLDocument

问题 I have an app that uses a (perfectly user-benevolent) system-wide keyboard hook for accessibility purposes. When the app starts up, I check if the "Enable Access for Assistive Devices" setting is checked, as asked by someone else here: Programmatically determine if "enable access for assistive devices" is checked in Cocoa app My problem is that, even after Enabling Access via the checkbox, the app continues to run without those privileges. How do I give the (currently running) app the