Recent questions tagged objective

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559 views

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objective c - Create a thumbnail or image of an AVPlayer at current time

I have implemented an AVPlayer and i want to take an image or thumbnail when clicking on a toolbar button and ... the current play time. 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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372 views

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objective c - How to constrain autorotation to a single orientation for some views, while allowing all orientations on others?

This question is about iOS device rotation and multiple controlled views in a UINavigationController. Some views should ... to give an answer. 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 - Xcode linker error: file too small for architecture x86_64

I'm developing an application in Xcode. When I try to build, this error comes up: ld: in /Users/theodore/ ... Does anyone know what's wrong? See Question&Answers more detail:os...

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

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397 views

1 answer

objective c - iPhone Facebook Video Upload

I've been working on this for a couple of days now and just can't seem to find a straight answer or ... fileURL params:params delegate:self]; } See Question&Answers more detail:os...

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

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987 views

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objective c - Xcode: Getting warning "implicit conversion from enumeration type UIDeviceOrientation"

Full warning: Implicit conversion from enumeration type 'UIInterfaceOrientation' to different enumeration type ' ... coming from. See Question&Answers more detail:os...

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

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584 views

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objective c - How to limit NSTextField text length and keep it always upper case?

Need to have an NSTextField with a text limit of 4 characters maximum and show always in upper case but can ... doing it. Any better suggestion? See Question&Answers more detail:os...

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

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653 views

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objective c - How to get substring of NSString?

If I want to get a value from the NSString @"value:hello World:value", what should I use? The return value I want is @"hello World". See Question&Answers more detail:os...

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

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653 views

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objective c - Different data for sharing providers in UIActivityViewController

I'm trying to use an UIActivityViewController with one long NSString as the data. If I put a string > ... other stuff in other UIActivities.) 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 - send a notification from javascript in UIWebView to ObjectiveC

I need to know what should be done to use JavaScript in a HTML sitting in UIWebView to notify Objective-C ... that the animation has ended. See Question&Answers more detail:os...

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

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733 views

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objective c - Storing and retrieving unsigned long long value to/from NSString

I have an unsigned long long value which I want to store into an NSString and retrieve from the string. ... into an NSNumber variable. 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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506 views

1 answer

objective c - How to retrieve the most recent photo from Camera Roll on iOS?

I'm having a hard figuring out how to programmatically retrieve the most recent photo in the camera roll without user ... find any info on 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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674 views

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objective c - viewDidLoad in NSViewController?

On the iPhone I use UIViewController's viewDidLoad to run code to set up the view. How can I do that with ... but it doesn't work... See Question&Answers more detail:os...

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

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664 views

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objective c - Using an NSString in a switch statement

Is it possible to use an NSString in a switch statement? Or is it better to just use if / else if? See Question&Answers more detail:os...

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

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511 views

1 answer

objective c - How to convert An NSInteger to an int?

For example when passing a value message to an NSInteger instance like so [a value] it causes an EXC_BAD_ACCESS. So ... numbers < 32 are used. See Question&Answers more detail:os...

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

0 votes

639 views

1 answer

objective c - Reading samples via AVAssetReader

How do you read samples via AVAssetReader? I've found examples of duplicating or mixing using AVAssetReader, but ... each sample? Thanks. See Question&Answers more detail:os...

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

0 votes

512 views

1 answer

objective c - Implementing a splash screen in iOS

I'm quite a newbie in Cocoa, Objective-C and iOS development. I'd like to implement a View that is just a ... few seconds like I want to do. See Question&Answers more detail:os...

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

0 votes

447 views

1 answer

objective c - Unable to add UITextField to UIAlertView on iOS7...works in iOS 6

The code below works on iOS6 (and before) but the UITextField does not display in iOS7...any ideas on how to ... and there is no keyboard): See Question&Answers more detail:os...

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

0 votes

479 views

1 answer

objective c - iOS - Delayed "Touch Down" event for UIButton in UITableViewCell

I have a custom UITableViewCell, which is initialized by the following: - (id)initWithStyle:(UITableViewCellStyle ... the background appearance. See Question&Answers more detail:os...

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

0 votes

565 views

1 answer

objective c - NSString : easy way to remove UTF-8 accents from a string?

I want to change a sentence, for example: être ou ne pas être. C'était là-bas. Would become: Etre ou ne ... on my own by checking each char? 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

1 answer

objective c - iPhone: How to get local currency symbol (i.e. "$" instead of "AU$")

Here's a code of how I get currency symbol now: NSLocale *lcl = [[[NSLocale alloc] initWithLocaleIdentifier:@" ... Any ideas? Thanks in advance. See Question&Answers more detail:os...

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

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464 views

1 answer

objective c - Give warning when [super method] is not called

When not using ARC, you get a warning when not calling [super dealloc] in your dealloc method. I'm trying to ... don't call super. Any ideas? See Question&Answers more detail:os...

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

0 votes

672 views

1 answer

objective c - strong / weak / retain / unsafe_unretained / assign

properties for synthesizing the property : retain / assign retain - it is retained, old value is released ... be unsafe_unretained or assign? See Question&Answers more detail:os...

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

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536 views

1 answer

objective c - iOS Designated Initializers : Using NS_DESIGNATED_INITIALIZER

We have this new macro being introduced in XCode 6 : NS_DESIGNATED_INITIALIZER I searched on the net, ... documentation would be appreciated. See Question&Answers more detail:os...

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

0 votes

492 views

1 answer

objective c - Run AppleScript from Cocoa Application

Is it possible to run an AppleScript code inside an Cocoa Application? I've tried NSAppleScript class, but no ... , does Apple allow this? See Question&Answers more detail:os...

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

0 votes

652 views

1 answer

objective c - PBKDF2 using CommonCrypto on iOS

I'm trying to use CommonCrypto to generate keys using PBKDF2 but I can't seem to import CommonCrypto/ ... the other CommonCrypto headers. See Question&Answers more detail:os...

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

0 votes

556 views

1 answer

objective c - How to Animate a UIBezierPath

i would like to animate a UIBezierPath of a rect to a triangle one, not to animate a view on a path but ... frame]; return [rect CGPath]; } See Question&Answers more detail:os...

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

0 votes

416 views

1 answer

objective c - Writing a privileged helper tool with SMJobBless()

Even though the API has been open since Mac OS X Leopard, there's surprisingly, and unfortunately, very little ... security hole. No thanks.) See Question&Answers more detail:os...

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

0 votes

359 views

1 answer

objective c - Can you do custom animations for UITableView Cell Inserts?

I've got a UITableView that is being populated by an NSFetchedResultsController. On the initial load of the table ... Thanks for any help! Joel See Question&Answers more detail:os...

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

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