Recent questions tagged objective

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objective c - iOS subview displayed as a black rectangle if drawRect is overwritten

I have a storyboard which loads loads a custom UIView. Also a sub view is added to the view in the ... ctx, rect); CGContextFillPath(ctx); See Question&Answers more detail:os...

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

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651 views

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objective c - UIMenuController sharedMenuController - custom menuitem for uicollectionview do not show in ios 7

I'm using a UIMenuItem to perform a custom action in UICollectionView cell long press. this worked perfectly with ... indexPath; return YES; } 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 - Assigning to 'readonly' return result not allowed, but property is declared "readwrite"

I have a class with readwrite int properties: @interface PlayScene : UIView @property (readwrite, assign) int Figure1; ... What is the problem? See Question&Answers more detail:os...

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

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739 views

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objective c - atebits Twitter fast scrolling

I'm looking to implement the same technique used by atebits in the Twitter app to achieve very fast UITableView ... 's into one view? 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

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objective c - Making stringWithContentsOfURL asynchronous - Is it safe?

I attempted to make -[NSString stringWithContentsOfURL:encoding:error:] asynchronous, by running it a-synchronically from ... 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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754 views

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objective c - Can I limit concurrent requests using GCD?

I'm acquiring data from a database asynchronously. Is there any way I can limit the concurrent requests to a number, ... it? Can GCD achieve 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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570 views

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objective c - What is the difference between arrayWithObjects and initWithObjects?

Can you please explain me exact difference between these two lines? NSArray *foo = [NSArray arrayWithObjects:@"hai",@"how ... "are",@"you",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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685 views

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objective c - Events for custom UIView

What's the best way for registering events for my UIView subclass, so that I can connect them to IBAction-s in ... get events out of it. 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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682 views

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objective c - How to make NSSearchField send action upon autocompletion?

This question seems straightforward but I've tried everything I can think of, and Googled for hours. I have an ... as above Any ideas? 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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560 views

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objective c - Cocoa: Testing to find if an NSString is immutable or mutable?

This produces an immutable string object: NSString* myStringA = @"A"; //CORRECTED FROM: NSMutableString* myStringA = ... something evil to 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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589 views

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objective c - Changing the locking object inside @synchronized section

Can I do any of the following? Will they properly lock/unlock the same object? Why or why not? Assume there ... [[NSObject new] autorelease]; } See Question&Answers more detail:os...

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

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557 views

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objective c - Dismissing a UIAlertView in ios 7 not working?

I'm trying to dismiss a UIAlertView before showing another and I found the answer here: iOS dismiss UIAlertView ... another solution for 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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752 views

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objective c - UIView touchesbegan doesn't respond during animation

I have a draggable class that inherits UIImageView. The drag works fine when the view is not animating. But ... ] bringSubviewToFront:self]; } See Question&Answers more detail:os...

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

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604 views

1 answer

objective c - Can I include a framework in another framework?

I'm writing a framework (called Lighthouse.framework) that, in turn, uses code from another framework (RegexKit. ... can I resolve my error? 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 - an error "No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=armv7 armv7s)."?

I have Xcode 4.6. I downloaded this project When run it i receive a message No architectures to compile for ( ... idea what should i do? Thanx See Question&Answers more detail:os...

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

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711 views

1 answer

objective c - How to achieve paint brush strokes in iOS

I am developing an iOS app that uses a paint brush to draw in a board. I have created a simple paint tool ... stroke I would like to create: See Question&Answers more detail:os...

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

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614 views

1 answer

objective c - objc_setAssociatedObject unavailable in iPhone simulator

In the 3.1 SDk, Apple added support for associated objects. However, the simulator will not compile code that ... Bug Filed: rdar://7477326 See Question&Answers more detail:os...

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

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516 views

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objective c - Xcode now generates an empty category. Why?

I noticed this while using iOS6 beta 3 When I create a new subclass of a UIViewContoller (no other parent classes ... . A slight annoyance.... 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 - Debug Core Data Migration to compare hash values

I read this Post (click) about fixing a nasty core data migration problem. The author Victor Bogdan wrote ... problems with older versions. 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

1 answer

objective c - Did the way how to globally import files change in Xcode 6 / iOS 8?

I used to do my global imports (i.e. imports that would be visible to all source files in my Xcode project) ... won't be working with this one. See Question&Answers more detail:os...

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

0 votes

653 views

1 answer

objective c - How implement a UIActivityIndicatorView when the UIWebView is Loading? (iPhone ObjC)

I want to know how to implement an activityIndicator in a WebView based app, I wrote the following code but the ... Did finish loading"); } 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

1 answer

objective c - iPhone Programming: Deactivate spell check in UITextView

UITextAutocorrectionTypeNo didn't work for me. I'm working on a crossword app for the iPhone. The questions are ... on any other place. 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

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objective c - MFMailComposeViewController in Swift does not dismiss

This is sample code: import UIKit import MessageUI class ViewController: UIViewController, MFMailComposeViewControllerDelegate { ... What wrong? 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

1 answer

objective c - Ctrl-Drag from button to method not working. Xcode/Interface Builder

I am building an iOS app and i have most of the code/GUI built (its a single view app). Now i ... identical project that works just fine 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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661 views

1 answer

objective c - Cocoa wrapper for an interactive Unix command

Ok, so I know you can make an NSTask to run command line tools with Objective-C: NSTask *task; task = ... based on the information it outputs. See Question&Answers more detail:os...

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

0 votes

685 views

1 answer

objective c - Fetched Properties v Relationships (Core Data - iPhone)

I'm a new iPhone developer (of about 4 months or so) who is starting to look at Core Data. In the "Beginning ... am new to the iPhone-Way... See Question&Answers more detail:os...

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

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645 views

1 answer

objective c - Get button's row in view based table

How do you get the row for a button in a view based table when you click the button? The row is ... method in a subclass of NSTableCellView. See Question&Answers more detail:os...

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

0 votes

665 views

1 answer

objective c - {NSDecimalNumber integerValue} behaving strangely in iOS8

OK team, this is weird. [NSDecimalNumber integerValue] is behaving strangely. I'm sat at a breakpoint, trying ... 12 Thanks in advance! Matthew See Question&Answers more detail:os...

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

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