Recent questions tagged Cocoa

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cocoa - NSWindowController clarification of understanding

I have used NSWindowController in projects several times, and feel like I have a (very)rough grasp of the ... highly appreciated. Thanks, Laurie See Question&Answers more detail:os...

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

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544 views

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cocoa - Objective-C: Assertion vs. Exception vs. Error

In Cocoa, when should I use NSAssert, NSException, NSError? Here's what I've been thinking: NSAssert - When ... guaranteed to give me a result? See Question&Answers more detail:os...

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

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611 views

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cocoa - Objective-C: Extract filename from path string

When I have NSString with /Users/user/Projects/thefile.ext I want to extract thefile with Objective-C methods. What ... easiest way to do that? See Question&Answers more detail:os...

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

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453 views

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cocoa touch - Repeating background image in native iPhone app

Short of putting a UIWebView as the back-most layer in my nib file, how can I add a repeating background ... repeat it using copy and paste? See Question&Answers more detail:os...

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

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489 views

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cocoa touch - How to pause and resume UIView Animation (without Block Animation)?

How do you pause and resume UIView Animations? (without block animations) I was having the hardest time figuring this out, ... on how to do it. See Question&Answers more detail:os...

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

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438 views

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cocoa - Objective-C all instances for UI is nil

I'm trying to do my first project in Objective-C/Xcode for Mac. So far, I have just copied an example ... inside IBAction call in AppDelegate.m See Question&Answers more detail:os...

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

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555 views

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cocoa touch - Audio recorded is echoing in mac app using Apple Sample

I need to implement audio recording feature in my mac app.i am using the Apple sample http://developer.apple ... also has the same problem See Question&Answers more detail:os...

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

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547 views

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cocoa - Why is NSDirectoryEnumerator picking up hidden files here?

i need to avoid hidden files in this enumeration, but .DS_Store files are still being added. i put in the NSLog to ... is 1"); continue; } } See Question&Answers more detail:os...

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

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623 views

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cocoa touch - Proper sequence to get registration token for GCM push notification on iOS? Is GCM unreliable?

Hi I've followed the tutorial for using GCM on iOS. It has been working intermittently(which means all the ... Code=-25300 "(null)" See Question&Answers more detail:os...

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

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477 views

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cocoa touch - iPhone UIWebView PDF Page Jump

I want to view a local PDF (in my iPhone app) and be able to jump to a specific page. Seems like the ... techniques I can use? thanks, Howie See Question&Answers more detail:os...

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

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452 views

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cocoa - NSTableView's viewForTableColumn:row: called for more rows than expected in Mavericks

My understanding was that viewForTableColumn:row: would be called only for rows that are visible. I confirmed this ... Can anybody explain this? See Question&Answers more detail:os...

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

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589 views

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cocoa touch - Is there any way to programmatically delete my own iOS app?

Is there any way within the iOS SDK for an app to delete itself? I'm seeking the following behavior: If a user ... to delete the app as well. See Question&Answers more detail:os...

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

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541 views

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cocoa - NSScrollView with auto layout not resizing until first manual window resize

I've got an OSX Cocoa app that has been built programatically (i.e., not with a NIB/XIB), ... app.activateIgnoringOtherApps_(True) app.run() See Question&Answers more detail:os...

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

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534 views

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cocoa touch - iPhone: get duration of an audio file

What is the easiest way to get a duration of an audio file? I could create an object of AVAudioPlayer, ... there an easier way? 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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518 views

1 answer

cocoa - Get Image from CALayer or NSView (swift 3)

I was looking for a way to render a CALayer or NSView and get NSImage back. I have a custom class, which is a ... , so this part might be wrong. See Question&Answers more detail:os...

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

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542 views

1 answer

cocoa - How to deploy to Snow Leopard with ARC enabled

I have an OSX app that I would like to migrate to ARC. Everything works fine if I set the base SDK to 10.7. ... my app to 10.6 with ARC enabled? See Question&Answers more detail:os...

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

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493 views

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cocoa touch - imageWithCGImage and memory

If I use [UIImage imageWithCGImage:], passing in a CGImageRef, do I then release the CGImageRef or does UIImage ... a double-free was occurring. See Question&Answers more detail:os...

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

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533 views

1 answer

cocoa - Objective-C Charting Framework

I'm in urgent need of an Objective-C/Cocoa/Cocoa Touch framework to handle simple charting; pie chards, ... such a framework or library. See Question&Answers more detail:os...

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

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518 views

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cocoa - Prevent selecting all tokens in NSTokenField

Is there any way to prevent the NSTokenField to select everything when pressing the ENTER key or when making to the ... maybe using the TAB key? See Question&Answers more detail:os...

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

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581 views

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cocoa - Are layer-backed NSView siblings allowed to overlap?

I'm a little confused. The Apple Documentation states this: Note: For performance reasons, Cocoa does not enforce clipping ... 10.5, that is? See Question&Answers more detail:os...

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

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498 views

1 answer

cocoa touch - Core Location not working in iOS 8

I'm trying to use significant change location monitoring in iOS 8, but the didUpdateLocations method is never ... never shows the location. See Question&Answers more detail:os...

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

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437 views

1 answer

cocoa - Copying blocks (ie: copying them to instance variables) in Objective-C

I'm trying to understand blocks. I get how to use them normally, when passed directly to a method. I'm ... blocks?) Thank you very much! See Question&Answers more detail:os...

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

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395 views

1 answer

cocoa touch - Is there any way to get the neat Objective-C literal indexing feature in Xcode 4.4?

I read all about the new Objective-C literals, and used Xcode to convert my old code, but the indexing code ... NOW! Is there any 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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453 views

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cocoa - Which SCM system for Xcode?

I am developing an application for the Mac as a small team (me + another person) effort. We are located in ... . Thanks for all the comments. See Question&Answers more detail:os...

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

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736 views

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cocoa - Copy NSAttributedString to pasteboard

Brand new to Cocoa and I'm trying to figure out how to copy an NSAttributedString to the pasteboard. I' ... I set a NSAttributedString? 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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516 views

1 answer

cocoa touch - iPhone - Corrupt JPEG data for image received over HTTP

I'm getting an image over HTTP, using NSURLConnection, as follows - NSMutableData *receivedData; - (void) ... constructing my image improperly? See Question&Answers more detail:os...

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

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636 views

1 answer

cocoa touch - Remove underline on UIButton in iOS 7

Any one know how to remove the UIButton underline that appears because of Accessibility? (I know it's because ... some property in Xcode? See Question&Answers more detail:os...

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

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416 views

1 answer

cocoa touch - Simplest way to loop between two NSDates on iPhone?

What's the simplest way to loop from one date to another? What I want conceptually is something like this: for ( ... a good one. 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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