xcode4.2 | 易学教程

iOS: Storyboard backwards compatible

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问题 I created my application with Storyboard not realizing till it was to late that iOS4.3 devices will not be supported. Is there an option where I can copy the storyboard views into xibs or programmatically do it at runtime? What options do I have without completely starting over? Kinda makes storyboards useless since alot of people still use iOS4x 回答1: If you bought an iPhone 3G, the day before the 3GS came out, or bought remaining stock in the following weeks, your 20 month upgrade would be

where is the RESOURCES folder in the new xCode4.2

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问题 I can't seem to find the Resources folder in the new xCode4.2 project navigator where do i put the image resources for my app icon in this new xCode4.2? Here is a screenshot: 回答1: It looks like many samples from Apple now use the Supporting Files folder instead. You can go ahead and create your own Resources folder, or go ahead and use Apple's Supporting Files folder. 来源： https://stackoverflow.com/questions/7507997/where-is-the-resources-folder-in-the-new-xcode4-2

How to add a .sql file to sqlite db in Xcode [duplicate]

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问题 This question already has answers here : How should I specify the path for an sqlite db in an iPhone project? (3 answers) Closed 6 years ago . I am writing a offline iPhone app in which I need to read and display from a database which consists of a few number of tables. The tables have over 100k entries in it, so it is almost impossible to enter it all individually. I have downloaded the .sql file of the entire db. Now how can I import the db as such into sqlite/Xcode so that I can readily

NSToolbar: how do I initialise with a selected item?

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问题 I have a Mac OS application with a preferences window with a NSToolbar on it. I have also a custom subview under it and other 3 custom views that are loaded inside the first one when the user clicks on one of the options. So far, so good. Now I realised the first item is not selected by default when the window is loaded. I see no options in the inspectors, except the "selectable", which I used. But there is no "selected". Should I do it programmatically? How? 回答1: NSToolbar has a

Cocos2D scene memory management

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I have a question about Cocos2D. I have 2 scenes in my game both have a lot of sprites on the scene. What happened when I replace the one scene and load another? Are all sprites removed automatically or it is taking memories and will be release when I release in dealloc of the scene? I am unable to understand of this thing how the memory manage in this condition, so can any one explain me that thing and one thing more is this is important for us to make the sprite retain when we load it on the scene. The moment you call replaceScene both scenes will exist in memory for a short time period! If

Xcode 4.2 “cell reuse indentifier in nib (Cell) does not match the identifier used to register the nib (ThisCell)”

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问题 I'm trying to use the new StoryBoard feature of Xcode 4.2 and keep getting this error when using a Table View with a custom cell. cell reuse indentifier in nib (Cell) does not match the identifier used to register the nib (ThisCell) I've set the class of my custom cell to my custom UITableViewCell class and set the Identifier to "ThisCell" in IB. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @

How to display video from images

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#import "ViewController.h" #import "AVFoundation/AVAssetWriter.h" #import "AVFoundation/AVAssetWriterInput.h" #import "AVFoundation/AVMediaFormat.h" #import "AVFoundation/AVVideoSettings.h" @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; NSArray *documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentDirectory = [documentDirectories objectAtIndex: 0]; // NSLog(@"Where it is %@ \n",documentDirectory); image1.image = [UIImage imageNamed:@"images1.jpg"]; CGSize sizeOfImage = image1.image.size; // printf(

I'm not getting the NSPersistentStoreDidImportUbiquitousContentChangesNotification (with code sample)

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问题 I'm trying to learn how to use iCloud with coredata. My target is to sync a single database file on mac/ios. Both my mac and iOS apps seem to be updating iCloud as I can see it under System Preferences->iCloud->Manage ... There's an app named Unknown which everytime I change something on the ios/mac app is getting bigger and bigger. So that makes me think The apps are storing changes to the cloud. The problem is, I'm not getting the

How do you create a Shell Script target in Xcode 4.2?

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问题 I was wondering if anyone knew with XCode 4.1 how to create a shell script. The option for that doesn't exist, but it might be called something else in the latest version. Ta 回答1: Select your project in the navigator Click "Add Target" - Choose "Aggregate" for an empty Target Add Build Phase -> Add Run Script Click Build Phases and edit the Run Script Phase 来源： https://stackoverflow.com/questions/9088985/how-do-you-create-a-shell-script-target-in-xcode-4-2

Warning is not displayed in Xcode Issue Navigator

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问题 My project builds with a warning, but it is not displayed in the "Issue Navigator". How can I get to this warning so I can resolve it? I've tried clicking on the warning on the top of the window but that does nothing. I'm using Xcode 4.3. 回答1: I met the same problem, and I found it simply because there are some thing wrong with the below filter input. You can solve the problem by typing something in the below filter input and then clear it. 回答2: Building on Yingpei Zeng's answer, the buttons