Recent questions tagged objective

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objective c - Convert int to shortened, formatted string

The user will enter a dollar value as an int, and I'd like to convert the result into a shortened, formatted ... @"Cash = %@", stringValue); See Question&Answers more detail:os...

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

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386 views

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objective c - NSString get -characters

I want to get the characters of an NSString. Like this: NSString *data; const char * typein = [[data ... characters of NSString? thanks, Elijah See Question&Answers more detail:os...

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

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382 views

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objective c - iOS 7 UIToolBar Overriding With Status Bar

I have upgraded my project from iOS 6 to iOS 7 but there seems a little problem. The status bar and a tool ... ; wvc.urlString = entry.link; } 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 I send email programmatically in iPhone app?

I need to be able to send a pre-formatted email or SMS text message programmatically from within an iphone app. ... found a solution to 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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447 views

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objective c - Is there a way to wrap an ObjectiveC block into function pointer?

I have to provide a C-style callback for a specific C library in an iOS app. The callback has no void * ... or to wrap/cloak it somehow? See Question&Answers more detail:os...

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

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450 views

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objective c - Cannot create PDF document with 400+ pages on iOS

I am using the following pseudocode to generate a PDF document: CGContextRef context = CGPDFContextCreateWithURL(url, ... a background thread. See Question&Answers more detail:os...

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

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327 views

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objective c - Why do Xcode templates have #imports that duplicate Prefix.pch?

While learning iPhone programming, every Xcode template I've seen includes an AppName-Prefix.pch file with the ... compiled and ran correctly. See Question&Answers more detail:os...

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

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597 views

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objective c - How can we programmatically change the brightness of the iPhone screen?

How can I change the brightness of the screen programmatically using iPhone SDK? 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 - iPhone: [super viewDidUnload] calling order

I would like to know if there is any difference between calling [super viewDidUnload] before realeasing properties or ... self.fullText = 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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342 views

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objective c - What is PngCrush in iOS?

i know that Pngcrush is an image optimisation technique in iOS , but my doubt is does X-code will perform ... to do this image optimization? See Question&Answers more detail:os...

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

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413 views

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objective c - NSStream TCP Keep-alive iOS

I have written this code to setup a stream with a server: -(void)streamOpenWithIp:(NSString *)ip withPortNumber:( ... iOS Thanks for 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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386 views

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objective c - Write custom object to .plist in Cocoa

I am blocking into something and I am sure it is too big. I have a custom object that look like this @interface ... to the plist, any idea ? See Question&Answers more detail:os...

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

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476 views

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objective c - Notification of cancellation of auto-renewal for an in-app purchase

I am working on an iPhone app and I want to implement the new model of auto-renewal for in-app purchases. I ... to allow access (once expired)? See Question&Answers more detail:os...

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

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654 views

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objective c - How to add a time interval to an NSDate?

I have an NSDate and a duration. I need to get the time after the duration Given: The date is "2010-02-24 ... another C function I need to use See Question&Answers more detail:os...

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

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395 views

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objective c - Sorting NSDictionary

I was wondering if someone can show me how to sort an NSDictionary; I want to read it starting from the last ... get the results I want. Thanks See Question&Answers more detail:os...

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

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313 views

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objective c - vertically aligning UINavigationItems

I have customized the UINavigationBar's height to 100px and I'd like to add buttons onto this ... UIBarButtonItems on a UINavigationBar? 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

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objective c - Remove Keyboard Form toolbar on ios7 leaves a blur behind

I can remove the toolbar but I am left width a blur of the height the toolbar was. Any idea on how to ... apple.com and duplicate rdar://9844216 See Question&Answers more detail:os...

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

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451 views

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objective c - Observing count in NSMutableArray

I'd like to be notified, when the count, ie. number of items in an NSArray changes.. Of course I ... this to NSMutableArray of course.. See Question&Answers more detail:os...

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

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349 views

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objective c - iPhone UITableView Sections

I have been programming a UITableView and each cells pushes a new view, All I Want to do is add two new sections ... stuck on this for a while! See Question&Answers more detail:os...

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

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526 views

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objective c - Restrict NSTextField input to numeric only? NSNumberformatter

I'm just getting started up with Mac App Development and so far everything is good well, I'm just having ... pointers on this would be great See Question&Answers more detail:os...

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

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458 views

1 answer

objective c - Does the UIImage Cache image?

UIImage *img = [[UIImage alloc] initWithContentsOfFile:@"xx.jpg"] UIImage *img = [UIImage imageNamed:@"xx.jpg"] ... images doesn't get cached? See Question&Answers more detail:os...

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

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439 views

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objective c - Inline function "undefined symbols" error

I want to write an inline function, but I get an error. How can I fix it? Error information: Undefined symbols for ... } else { return NO; } } See Question&Answers more detail:os...

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

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414 views

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objective c - Does Xcode support regions?

Does Xcode support anything akin to Visual Studio style #region directives for arbitrary code folding? See Question&Answers more detail:os...

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

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323 views

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objective c - Chained expressions to perform calculations in Core Data

First of all: Happy new year :-) What I am trying to do I am trying to divide two attributes in Core Data ... directly in Core Data? 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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334 views

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objective c - iOS4 Create Background Timer

I (Basically) need to create a background timer on iOS 4 that will allow me to execute some code when a ... user. Help would be 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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479 views

1 answer

objective c - I get error 0x8badf00d in iPhone app, and is not the usual suspect

I have a random crash in my app in launching. I'm pretty sure is not the launching time (as explained in What ... by the watchdog, I think). See Question&Answers more detail:os...

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

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370 views

1 answer

objective c - How to get the active processes running in iOS

How do I programmatically get the active processes running in the background, CPU and RAM usage for iOS? See Question&Answers more detail:os...

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

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315 views

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objective c - XCode 4.3: Static Library Generation

I've done a some looking around but most of the answers I've found have been or felt incomplete and have ... if any more information is needed! See Question&Answers more detail:os...

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

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