Recent questions tagged cocoa

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cocoa - How can I convert hex number to integers and strings in Objective C?

Given the example of an array like this: idx = [ 0xe, 0x3, 0x6, 0x8, 0x2 ] I want to get an integer ... How can I achieve this in Objective C? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

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cocoa touch - UIImage to raw NSData / avoid compression

I have my own image downloader class, it holds a queue and downloads images one (or a certain amount) ... decompressed once? Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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842 views

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cocoa touch - checking for equality on dispatch_queue_t

How can I check for equality between dispatch_queue_t vars? dispatch_queue_t currentQueue = dispatch_get_current_queue(); ... as another? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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768 views

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cocoa touch - UIImagePickerController disable iPhone 4S face detection (iOS 5.1)

I am currently developing an iPhone app that makes use of a UIImagePickerController with a custom overlay to ... :cameraPicker animated:YES]; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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707 views

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cocoa - PyObjC and returning 'out' parameters (i.e. NSError **)

I'm implementing an ObjC protocol as a mix-in for a PyObjC class. This protocol defines an 'out' parameter. ... an ObjC out parameter in Python? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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842 views

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cocoa touch - Set default language at first run IOS

I'm trying to set the language for my app at first run. After seeing this question, I decided to do the same ... looks like black magic to me! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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755 views

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cocoa touch - Is an iPhone app's document directory /var/mobile/Documents or /var/mobile/Library/AppName?

As far as I know (and read everywhere) an application's documents directory should be somewhere in /var/mobile/ ... I never get this directory. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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801 views

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cocoa touch - GMail won't open .txt attachment created by iPhone App, Depending on Size - I think There's a Bug in my MIME

I have created aand sent a short email with a .txt attachment in an iPhone app. If the attachment is about 10 ... attached,nil]; [testMsg send]; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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838 views

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cocoa touch - Remove border for UIPopoverController

I have a requirement where in I have to display a custom border for UIPopoverController's popover view instead ... suggestions. Thanks, Raj See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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778 views

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cocoa touch - iPhone: Opening Application Preferences Panel From App

Is it possible to open the application's preferences pane directly from the app, or will users be forced to to go through the Settings app? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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921 views

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cocoa touch - Dynamic iPhone App icons?

The calender app does it... How can I make an app icon change based on stored info from the iPod or iPod ... the bundle. Does that make sense? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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856 views

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cocoa - Change Volume on Mac programmatically

I'm looking for a not applescript way to change the system volume on Mac OS X programmatically. I just couldn' ... a solution. Anyone any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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772 views

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cocoa - how to compare two optional NSArrays in Swift

Let's have two optional NSArrays. The goal is to check, if they are equal. My solution is func ... anyone have a better solution? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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754 views

1 answer

cocoa touch - Call a web service from iOS at a particular time daily in the background

Is there a way to schedule a function which calls a web service at a particular time on a daily basis? ... server at the scheduled time daily. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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715 views

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cocoa touch - Best way to download large files from web to iPhone for writing to disk

In an iPhone app I currently have code for downloading a file from the Web to the iPhone and saving it to disk ... , I am not sure. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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730 views

1 answer

cocoa - IBOutlet in objective-c

what does this line of code do : IBOutlet UITextField *userName; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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824 views

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cocoa touch - How to delete a contact from address book in iPhone using objective-c?

I want to delete a contact from the address book in iPhone how can we do that ? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

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cocoa - SCNGeometryElement setup in Swift 3

I bit the bullet and started converting my app to Swift 3. As always, the converter leaves very much to be desired ... I'm supposed to do here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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680 views

1 answer

cocoa - Inserting a string at a specified line in text file using objective c

Lets say I have a text file with the following data Username User ID Details suppose, I want to insert a new ... . please help me out. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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903 views

1 answer

cocoa - How to create a toolbar with "Search" Finder style, rounded buttons working like radio

I want to implement a toolbar having same 'search' Finder style, using standard NSSegmentControl doesn't work. How ... below shows what I want See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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990 views

1 answer

cocoa - -[NSTextField intrinsicContentSize] always has undefined width

I'm pulling hairs here. I have an NSTextField created on a xib that has an intrinsicContentSize adjusted to it's ... can't figure out what. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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643 views

1 answer

cocoa touch - How do you connect a tab bar item to an action?

I have a UIView which has a UITabBar with 4 UITabBarItem components in it (all created from IB). I want ... to the tabbaritem. Thanks Deshawn See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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738 views

1 answer

cocoa - writeToFile in OSX, appending to the file?

I need to write some data from time to time to a file, appending to it. Right now I have: BOOL ok = [[ ... of the file the new contents of raw? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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678 views

1 answer

cocoa touch - Playing M4V Protected Content with MPMoviePlayerController or AVPlayer (iOS)

Is there a way to have the MPMoviePlayerController (or even something lower level like AVPlayer) play protected M4V files ... 4.x. Thank You. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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750 views

1 answer

cocoa - Error building 32-bit OS X app?

I'm working on my first Mac OS X app. My project was set-up with XCode defaults and I haven't touched any ... kind of things can I check for? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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803 views

1 answer

cocoa - 'Class FIFinderSyncExtensionHost is implemented in both ...' warning in Xcode since update to macOS High Sierra

I am getting the following warning in the Xcode console while running (not compiling) my application since updating to ... this warning by now. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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819 views

1 answer

cocoa - Copy / Backup Persistent Store

Normally when I backed up the core data file for my app, I would just copy the .sqlite file to another ... Any better ideas ? Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

cocoa - Subclass NSView to change background color

I want to change the background color of a custom view. I have a subclass NSView something like that: #import <Cocoa ... and not in the other??? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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