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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548 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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719 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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927 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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586 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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567 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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941 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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655 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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878 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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786 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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547 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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1.0k views

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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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805 views

1 answer

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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644 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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677 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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626 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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752 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)

0 votes

774 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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774 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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653 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

733 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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736 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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789 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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636 views

1 answer

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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627 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)

0 votes

773 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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800 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

687 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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