Recent questions tagged objective

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objective c - are 2^n exponent calculations really less efficient than bit-shifts?

if I do: int x = 4; pow(2, x); Is that really that much less efficient than just doing: 1 << 4 ? See Question&Answers more detail:os...

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

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562 views

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objective c - Properties for Class and Its Subclasses Only

Is it possible to define properties that are only available to the class they are defined in, and that ... way to define protected properties? See Question&Answers more detail:os...

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

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729 views

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objective c - Using Cocoa to create an icon for a folder

In my Mac OS application, I'm prompting a user to create a new folder. I would like to apply an icon to ... something wrong in my code? 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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943 views

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objective c - Incorrect decrement of the reference count of an object that is not owned at this point by the caller

I have a very simple Person class that has a ivar called name ( an NSString). When I try to release this ivar ... error [super dealloc]; } @end See Question&Answers more detail:os...

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

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600 views

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objective c - 2 tableview on a single view

I need an example or explanations of how to populate 2 table views which are on the same ... ] withRowAnimation:UITableViewRowAnimationFade]; See Question&Answers more detail:os...

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

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574 views

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objective c - Slow Swift Arrays and Strings performance

Here is two pretty similar Levenshtein Distance algorithms. Swift implementation: https://gist.github.com/bgreenlee/ ... needs swift anymore? See Question&Answers more detail:os...

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

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951 views

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objective c - iphone Json POST request to Django server creates QueryDict within QueryDict

I'm creating a JSON POST request from Objective C using the JSON library like so: NSMutableURLRequest *request; ... not getting sent correctly? See Question&Answers more detail:os...

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

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669 views

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objective c - Generating permutations of NSArray elements

Let's say I have an NSArray of NSNumbers like this: 1, 2, 3 Then the set of all possible permutations would ... way to do this in objective-c? See Question&Answers more detail:os...

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

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892 views

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objective c - FBSDKAppInviteDialog in Facebook iOS SDK version 4.0.1 invite successfully sent, but no notifications received

With the new Facebook SDK 4.0.1, I have implemented below in my "Invite to App" button: FBSDKAppInviteContent ... with my friends? 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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798 views

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objective c - Showing an alert in an iPhone top-level exception handler

I'm trying to display a UIAlertView in a top-level iPhone exception handler. The handler function looks like this: ... way to make this work? See Question&Answers more detail:os...

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

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558 views

1 answer

objective c - How to embed ParseKit as a private framework in a Mac App bundle

I need to install ParseKit to compile with cocoa under Mac Os X, I use xcode 4. I have searched online but there is ... Mac Os X and/or a guide? See Question&Answers more detail:os...

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

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objective c - IOS11 UIContextualAction Place the image color text

To prevent the picture How to restore the real color I now place the image are white - (UISwipeActionsConfiguration * ... config; return nil; } See Question&Answers more detail:os...

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

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815 views

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objective c - NSBackgroundColorAttributeName-like attribute in NSAttributedString on iOS?

I was planning on using NSAttributedString to highlight portions of strings with the matching query ... becomes kCTForegroundColorAttributeName? See Question&Answers more detail:os...

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

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660 views

1 answer

objective c - Why isn't my time zone being saved into my NSDate?

I must initialize an NSDate object from NSString in objective-c. I do it like this: NSString *dateString = [[ ... I fix this problem? 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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687 views

1 answer

objective c - Setting the desktop background on all Spaces in Cocoa

I'm writing a small app to change your desktop background. If the user only uses one space, then it's all fine, ... way to do it in objective-c? See Question&Answers more detail:os...

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

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643 views

1 answer

objective c - What's the difference between a dictionary and an array?

What is the difference between a dictionary and an array, especially when working with PLIST files? What are the ... over the other? 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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766 views

1 answer

objective c - Is there a way to detect what UIView is currently visible?

I have a class that communicates with a web service and is used throughout the app. What I am looking for is ... every view if at all 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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791 views

1 answer

objective c - Debugging Quicklook Plugin in Xcode 4.6

I am trying to debug a quicklook plugin in Xcode 4.6. I have created the executable in Edit Scheme. Now, ... his knowledge. 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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785 views

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objective c - How can I insert row in a table?

I'm new in objective-c. I have a tableView with 3 rows and 1 section. Can you help me how ... ]; [tableView reloadData]; } See Question&Answers more detail:os...

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

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663 views

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objective c - Discovering at runtime which of a class' instance variables are declared __weak

I'm writing a tool which would benefit from knowing which of a class' instance variables are declared __weak. ... it breaking with updates) See Question&Answers more detail:os...

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

0 votes

746 views

1 answer

objective c - How to append string in local resource txt file for iOS sdk

I have been trying to append strings to a local resource file but I am having trouble finding a solution. I ... to overwrite the entire thing? See Question&Answers more detail:os...

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

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751 views

1 answer

objective c - UISplitViewController in portrait: how to hide master popover programmatically?

In my UISplitViewController the master controller is a UINavigationController. When in portrait mode I would like to ... yes, dismiss itself? See Question&Answers more detail:os...

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

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803 views

1 answer

objective c - iOS - MKMapView showAnnotations:animated: with padding?

I want to be able to zoom my MKMapView to fit it's annotations. I have managed to do it using iOS7's ... on how I could do it differently? See Question&Answers more detail:os...

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

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647 views

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objective c - performSelectorInBackground with multiple params

How can I call a method with multiple params like below with performSelectorInBackground? Sample method: -(void) ... firstCase:(BOOL)firstCase; See Question&Answers more detail:os...

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

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637 views

1 answer

objective c - Creating an iOS/OS X cross-platform class

I read a lot of questions about creating a cross-platform library for these 2 systems. Every answer points ... :(NSColor*)color; #endif See Question&Answers more detail:os...

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

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787 views

1 answer

objective c - iOS Get list of all WiFi networks

This is not a duplicate of the dozens of similar questions (too many to list) because I have evidence that it ... please submit an ObjC one too! See Question&Answers more detail:os...

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

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811 views

1 answer

objective c - How to make a directory iOS?

Okay, So I have a Cydia app that I need to update. I am aware with Cydia apps that they don't have a ... manually via SSH). 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

701 views

1 answer

objective c - didFinishLoadForFrame doesn't work

I've created a very simple Mac program to load a web page. It works and loads it well but I can't run ... I can not use delegate right.... See Question&Answers more detail:os...

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

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