Recent questions tagged objective

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objective c - Converting a CGPoint to NSValue

In CABasicAnimation.fromValue I want to convert a CGPoint to a "class" so I used NSValue valueWithPoint but in ... if in device or simulator. See Question&Answers more detail:os...

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

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619 views

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objective c - How to measure the distance in meters between two CLLocations?

How can I get the distance in meters between two CLLocations? CLLocation doesn't provide any method to do it, it seeems. See Question&Answers more detail:os...

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

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569 views

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objective c - Determine when NSSlider knob is 'let go' in continuous mode

I'm using an NSSlider control, and I've configured it to use continuous mode so that I can continually update ... reasons I've just outlined. See Question&Answers more detail:os...

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

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718 views

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objective c - Why would CFRelease(NULL) crash?

Is there a reason why CFRelease does not check for NULL? Isn't it unacceptable when [nil release]; free(NULL ... NULL; all work perfectly fine? See Question&Answers more detail:os...

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

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722 views

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objective c - NSDateComponents of an NSDate

How do I get the NSDateComponents of a single NSDate? I don't want the components of the difference between 2 ... month and year of a NSDate? See Question&Answers more detail:os...

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

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667 views

1 answer

objective c - Changing value of a NSNumber

Is there a way to change the value contained in an NSNumber after it is created without making it point to ... still, but different value. See Question&Answers more detail:os...

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

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679 views

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objective c - Visible buttons with transparent navigation bar

I've seen several apps that have completely transparent navigation bars but with visible buttons, I cant seem ... navigationBar setAlpha:0.0]; See Question&Answers more detail:os...

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

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569 views

1 answer

objective c - Using PLists for Persistence on iPhone

Simple question about property lists within an iphone app. I know you can read data in from a plist, but is ... resources on writing to plists. See Question&Answers more detail:os...

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

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592 views

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objective c - applicationWillTerminate does not get invoked

I want to save my data before terminating, so my AppControll class conforms the NSApplicationDelegate protocol, and ... what should I do? See Question&Answers more detail:os...

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

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632 views

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objective c - Cocoa Binding Mutable Dictionary with Search Field

In my header file, I have a property declared @property (strong) NSMutableDictionary *myContents; In my implementation, ... split this up then? See Question&Answers more detail:os...

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

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802 views

1 answer

objective c - iphone - force MPMoviePlayerController to play video in landscape mode

I have an app that is portrait mode only, but when the user plays a video I want it to play in fullscreen ... the best way to accomplish 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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713 views

1 answer

objective c - UIColor comparison

Given a UIColor, I need to determine if it is "light" or "dark". If I could access the hex value of ... check the brightness value of a UIColor? See Question&Answers more detail:os...

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

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579 views

1 answer

objective c - How to set app volume separately from system volume ( iOS device volume physical keys )?

Our app is able to play music on a wifi speaker. One of the features of the app is changing the ... onHardKeyVolumeChange:volume]; } } Thanks. See Question&Answers more detail:os...

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

0 votes

696 views

1 answer

objective c - how to find MAC address in MAC OS X programmatically?

I am new to Mac OS X and X code and want to know how to find the MAC address of a machine programmatically in OS X. See Question&Answers more detail:os...

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

0 votes

790 views

1 answer

objective c - How to calculate height of html string?

I want to display html text on a label(TTStyleLabel). I am receieving text in form of html. How do I calculate height of html string? See Question&Answers more detail:os...

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

0 votes

626 views

1 answer

objective c - How can I terminate my app in a helper app with sandboxing enabled?

I've created a helper app, which monitors iTunes and launches/terminates the main app. The launching works perfectly. ... I want to avoid that. See Question&Answers more detail:os...

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

0 votes

727 views

1 answer

objective c - How to change UIPageViewController direction of paging curl animation

I need to display Arabic (Right To Left) content and couldn't find any method to rotate animation of the page ... be turned from Left to right. See Question&Answers more detail:os...

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

0 votes

718 views

1 answer

objective c - Detecting Download in UIWebView

I have a programatically crated UIWebView, and it is used to browse a iPhone-style site stored on my server. ... would you do this correctly? See Question&Answers more detail:os...

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

0 votes

703 views

1 answer

objective c - bridgeToObjectiveC and makeObjectsPerformSelector in Swift beta 5

I had this code with a completion handler working in Xcode 6 beta 4 that no longer works in Xcode 6 beta 5. ... 'm missing in the release notes? See Question&Answers more detail:os...

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

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598 views

1 answer

objective c - How to immediately force cancel an NSOperation with AFNetworking?

I am using AFNetworking in my application and I am attempting to implement a "Tap To Cancel" feature in my progress ... { //operation failed }]; See Question&Answers more detail:os...

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

0 votes

647 views

1 answer

objective c - Do I need to release a constant NSString?

I'm reading memory management rules to this point where it said - (void)printHello { NSString *string; string = ... So doesn't that get leaked? See Question&Answers more detail:os...

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

0 votes

458 views

1 answer

objective c - Swift converts C's uint64_t different than it uses its own UInt64 type

I am in the process of porting an application from (Objective-)C to Swift but have to use a third-party framework ... a nice day! :-) Martin See Question&Answers more detail:os...

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

0 votes

524 views

1 answer

objective c - Can I mix OpenglES with standard Cocoa widgets on an iPhone app?

In case this is possible, it would be nice to see some examples! Thanks, rui See Question&Answers more detail:os...

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

0 votes

632 views

1 answer

objective c - Rating stars for the iphone

I have been looking for a 5-Star rating control for a while now and have not found a solid solution. This ... need a bit of hand-holding. See Question&Answers more detail:os...

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

0 votes

637 views

1 answer

objective c - applicationWillEnterForeground: reload Data from ViewController

I want my app to reload data as soon as the app switches from the background to the foreground. Thats my code: ... in advance for your help :) See Question&Answers more detail:os...

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

0 votes

646 views

1 answer

objective c - UINavigationItem Back Button touch area too large

On this following screenshot, if I click on "v" from "Available Kiosks" this is launching the action of the back ... . Any Ideas ? Thank you. See Question&Answers more detail:os...

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

0 votes

737 views

1 answer

objective c - How to receive output of NSTask in Cocoa?

I'm using NSTask in my Cocoa APP , and I need to be able to get result, and store it in Array, or ... finished , need output Thanks a lot! See Question&Answers more detail:os...

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

0 votes

818 views

1 answer

objective c - My isa-swizzling breaks KVO

I'm trying to implement isa swizzling because I need some actions to happen in dealloc method of certain ... methodImplementation, types); } See Question&Answers more detail:os...

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

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