Recent questions tagged objective

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objective c - JSON parsing using NSJSONSerialization in iOS

I am parsing a JSON in my code. But I am getting some unexpected issues while retrieving data of ... happening because of NSJSONSerialization? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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417 views

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objective c - What is this double underscore in Cocoa

The single underscore in Objective-C is apparently reserved for Apple's "internal" use (and was available for ... -underscore has me perplexed. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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460 views

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objective c - Updating UILabel in the middle of a for() loop

I have a method with a for() loop. In that loop, mylabel.text is updated many times. However, the actual label ... there is a way to do this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - Can you hard code IBActions and IBOutlets, rather than drag them manually in Interface Builder?

Is it possible to to hard code the IBActions and IBOutlets in code, instead of drag-connecting them in Interface Builder? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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608 views

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objective c - Put a transparent NSWindow permanently on top of another NSWindow

I want to have some UI controls on top of a NSWebView and because of this problem " https://stackoverflow.com ... to properly use Outlets etc. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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364 views

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objective c - Blocks and stack

I know that blocks are created in the stack. However, since I don't have enough knowledge about stack and local variables, I ... %d ", b[i]()); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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317 views

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objective c - Is possible send a array in Obj-c for a variable arguments function?

In python it is easy to build a dictionary or array and pass it unpacked to a function with variable parameters I have ... ?, ?)" ,??values]; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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354 views

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objective c - Is garbage collection supported for iPhone applications?

Does the iPhone support garbage collection? If it does, then what are the alternate ways to perform the operations ... that you can provide. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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291 views

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objective c - Phonegap: completely removing the black bar from the iPhone keyboard

We're using Phonegap to develop our mobile app, and we borrowed code from here to remove the black next/prev/ ... that has solved this problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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319 views

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objective c - NSFetchedResultsController doesn't call controllerDidChangeContent: after update to non-fetched NSManagedObject

I populate and save: an initial NSManagedObjectContext setup an NSFetchedResultsController with a different ... show; @end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

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objective c - How do I add custom pins to the iPhone MapKit?

I'm testing out the MapKit framework on the iPhone and would really much like to switch the standard pin that ... self; } @end Thank you! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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objective c - Creating Excel (.xlsx) files in Cocoa

I'm writing a Cocoa application and I'm trying to export to the Excel XML format (ISO/IEC 29500-1) which ... files using Cocoa and Objective-c? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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434 views

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objective c - Private ivar in @interface or @implementation

Is there any reason to declare a private ivar in @interface instead of @implementation? I see code like this ... do something with _foo @end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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384 views

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objective c - Check if my IOS application is updated

I need to check when my app launches if it was being updated, because i need to make a view that only ... to appear again after being updated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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555 views

1 answer

objective c - NSAutoreleasePool is unavailable

I am following "Programming in Objective-C" 3rd edition and I am having problems with the first example. ... will be greatly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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570 views

1 answer

objective c - Warning : Format string is not a string literal (potentially insecure)

I get the warning in the NSLog line Format string is not a string literal(potentially insecure) From the ... gone? NSLog(immutableString,nil); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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753 views

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objective c - Interface type cannot be statically allocated?

I tried to put this in the header file of my view object: @property (nonatomic) UIColor color; to ... ownership or storage attribute? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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296 views

1 answer

objective c - UITableView: Handle cell selection in a mixed cell table view static and dynamic cells

I am trying to mix dynamic and static cells in a grouped table view: I would like to get two sections ... I really would appreciate your help See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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396 views

1 answer

objective c - iOS - Facebook Connect logout not deleting login details?

I have used Facebook Connect on another project with relatively few problems, however on my current project it seems ... as it should be. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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410 views

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objective c - How can I preserve an ordered list in Core Data

I'm writing an API method that returns a list of objects from a web service. This service also caches results and ... the best way to do it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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276 views

1 answer

objective c - Facebook App invites notification not working in ios

I had implemented Facebook App invites in Demo Application. It worked fine but did not get notification. I have ... :nil] show]; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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419 views

1 answer

objective c - GROUP BY with SUM() using Core Data

I came across similar questions but none of them had a complete example of how to accomplish it. The SQL query I ... :]: object cannot be nil' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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409 views

1 answer

objective c - Cast closures/blocks

In Objective-C, I often pass around blocks. I use them very often to implement patterns that help avoid storing stuff ... in a pure Swift way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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336 views

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objective c - Two UITableView in the same view

I want to know if it's allowed to use Multiple UItableView in the same View (i don't see any ... in viewDidLoad for each UITableView? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

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objective c - How to programmatically get iOS's alphanumeric version string

I've been working with the nice PLCrashReport framework to send to my server the crash reports from my user ... everywhere I could imagine. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

1 answer

objective c - How can I compare two dates, return a number of days

how can I compare two dates return number of days. Ex: Missing X days of the Cup. look my code. NSDateFormatter ... (Missing X days of the Cup) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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465 views

1 answer

objective c - Hide the status bar on iPhone on a single view?

I want to show the status bar in my app in all views but one. I have tried modifying the 'status bar is ... how everything works but it does. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

1 answer

objective c - "Missing context for method declaration" for overridden description method

Am getting a "Missing context for method declaration" for my overridden description method. Can you tell ... return descriptionString; } @end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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