Recent questions tagged objective

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619 views

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objective c - Simulating low battery for iPhones

I am working on a mobile game, which appearantly crashes when the Low Battery alert is displayed. It works ... stressful on my iPhone battery. See Question&Answers more detail:os...

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

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690 views

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objective c - Using NSPredicate to determine if a string equals another string

I have an NSArray of CalEvents returned with the [CalCalendarStore eventPredicateWithStartDate] method. From the events ... to do 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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616 views

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objective c - How do I get first x elements of an NSArray in Cocoa?

New to Cocoa, and seem to be missing something. What is the most elegant/idiomatic way to obtain the first ... 10 items from largeArray 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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657 views

1 answer

objective c - Subclassing UIButton but can't access my properties

I've created a sub class of UIButton: // // DetailButton.h #import <Foundation/Foundation.h> #import <MapKit/ ... any help you can provide Ross See Question&Answers more detail:os...

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

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688 views

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objective c - How to create a horizontal scrolling view on iPhone?

I want to create a horizontal scrolling field at the top of a UITableView (something similar to what can be found ... )? Thanks for the help. See Question&Answers more detail:os...

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

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501 views

1 answer

objective c - How to detect the skin color of face from the source image in ios 5?

I need to color the skin of the face... How do i find the skin color? now i get the skin color by RGB ... ctx); free(rawData); } Regards, Spynet See Question&Answers more detail:os...

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

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507 views

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objective c - Programmatically changing desktop image

I am trying to change the desktop image; the procedure I've come up with is below. The first time this ... release]; [resizedImage release]; } See Question&Answers more detail:os...

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

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615 views

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objective c - Hide MAAttachedWindow when clicking outside

I'm using an MAAttachedWindow to display a custom window under a NSStatusItem in the Menubar. Everything works fine, ... a click on 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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818 views

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objective c - obj-c duplicate symbol for header variable

It was my impression that using #import would only import a file once per build, yet after trying to define ... variable. How is this possible? See Question&Answers more detail:os...

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

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940 views

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objective c - PKAddPassPaymentRequest not able to send a Request

I'm Developing Apple Pay Card Provisioning Apple Pay In-App Provisioning Card I got this continuing this functionality ... ]; Thanks in advance. See Question&Answers more detail:os...

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

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855 views

1 answer

objective c - How to play a Vimeo video in iOS?

I've tried to search to web, but I couldn't find a topic not older than 1 year regarding this problem, ... this HTTP response from Vimeo Why? See Question&Answers more detail:os...

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

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515 views

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objective c - How to interpret a crashlog with no references to a specific class

Today my app crashed and generated this crashlog. The crashlog does not mention any classes in my project and to ... ? Thanks for your help! See Question&Answers more detail:os...

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

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492 views

1 answer

objective c - Detect black pixel in image iOS

As of now I am searching every pixel 1 by 1 checking the color and seeing if it's black... if it isn' ... that are like 95% black? 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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779 views

1 answer

objective c - What's the difference between @property and @synthesize?

Like I understand, @synthesize actually is generating the Getters and Setters. But what's @property then doing ... @synthesize magic function? See Question&Answers more detail:os...

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

0 votes

501 views

1 answer

objective c - Why do NSBlocks have to be copied for storage in containers?

- (void) addABlock { void (^aBlock)(void) = ^() { [someObject doSomething]; }; [self.myMutableArray ... inside-blocks-episode-3-block-copy/ See Question&Answers more detail:os...

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

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668 views

1 answer

objective c - Access workout data even when apple watch screen turn off

I success to get heart rate data in live without workout session on apple watch os 2. But when apple watch ... you have another idea ? Regards See Question&Answers more detail:os...

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

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464 views

1 answer

objective c - Error compiling with ARC when runtime programming dynamic method

I am trying to do some runtime programmation on Objective-C. In order to do this I override the ... this code with ARC activated. See Question&Answers more detail:os...

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

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515 views

1 answer

objective c - How to take a screenshot from an video playing through MPMediaPlayerController in iPhone?

Can anybody help me in this? I want to get an screenshot from an video playing through MPMediaPlayerController. What ... ? Please help.Thanks :) See Question&Answers more detail:os...

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

0 votes

652 views

1 answer

objective c - Video capture with 1:1 aspect ratio in iOS

I want to capture videos with an iOS camera with 1:1 aspect ratio. I tried with UIImagePickerController, but ... 1 aspect ratio video capturing: See Question&Answers more detail:os...

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

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638 views

1 answer

objective c - AFNetworking not resuming download

I am using AFNetworking to download large file into my iPad app. An instance of AFHTTPRequestOperation is used to ... { [operation resume]; } See Question&Answers more detail:os...

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

0 votes

796 views

1 answer

objective c - Initialize Public Key From Modulus & Exponent using OpenSSL

Trying to generate an RSA Public Key given an APIs modulus and exponent. I'm using OpenSSL on iOS 4.2. Generating the ... , NULL, 0, 0, NULL); See Question&Answers more detail:os...

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

0 votes

462 views

1 answer

objective c - iOS - Resize multiple views with touch-drag separators

How can I resize views with a separator? What I'm trying to do is something like Instagram layout app. I want ... this? Where do I start? See Question&Answers more detail:os...

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

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599 views

1 answer

objective c - Newlines in iOS 7 UITextView breaking Text Kit exclusion zone wrapping

I'm working with Text Kit in iOS 7 and I'm finding a lot of oddities around NSTextContainer exclusion zones. I ... @[exclusion]; } Any thoughts? See Question&Answers more detail:os...

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

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690 views

1 answer

objective c - NSDateFormatter: how to convert date string with 'GMT' to local NSDate?

I need to convert a date string retrieved from a server, to local NSDate, the string looks like: "Fri, 30 ... looks like it does the opposite. See Question&Answers more detail:os...

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

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677 views

1 answer

objective c - Calling a selector with unknown number of arguments using reflection / introspection

Lately I wrote an application in java (for android) which used reflection to invoke methods of some objects. ... question as clear as possible. See Question&Answers more detail:os...

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

0 votes

584 views

1 answer

objective c - NSTextFinder set search string and clear visual feedback programmatically

I have an NSTextView that uses the find bar ([textView setUsesFindBar:YES];). I have 2 questions. How do I ... search string to the find bar? See Question&Answers more detail:os...

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

0 votes

643 views

1 answer

objective c - iPhone/iPad context menu

Im talking about the menu that shows up when you select a block of text it gives you the option to cut/paste/ ... without the "more" menu item? See Question&Answers more detail:os...

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

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833 views

1 answer

objective c - NSMutableDictionary KVO

I'm trying to observe changes in dictionary using KVO. Example: dictionary = [NSMutableDictionary new]; [dictionary ... solution doesn't scale. See Question&Answers more detail:os...

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

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