Recent questions tagged objective

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objective c - indexOfObject vs. indexOfObjectIdenticalTo

What is the difference between these two NSArray methods? See Question&Answers more detail:os...

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

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697 views

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objective c - lldb fails to print variable values with "error: reference to 'id' is ambiguous"

Since I updated to xcode 4.3 and let it switch my debugger over to lldb, any request to print a member ... to Apple as Bug ID# 11029004. See Question&Answers more detail:os...

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

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1.3k views

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objective c - Xcode 7 warnings: object file was built for newer iOS version than being linked

I recently integrated Google Cloud Messaging into an app targeting iOS 7 and iOS 8. Just grabbed Xcode 7 beta 4 ... encouraged to deal with 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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703 views

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objective c - What is the most efficient way to sort an NSSet?

What's the most efficient way to sort objects in an NSSet/NSMutableSet based on a property of the objects ... that array with NSSortDescriptor. 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 - Retrieve nsdata from sqlite stored in Blob data type for iPhone App

In iPhone App how to store UIImage converted into NSData to sqlite table in BLOB datatype? Is there any kind ... form? Please help and suggest. See Question&Answers more detail:os...

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

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368 views

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objective c - Grouping a Core Data data result?

I am prototyping an idea on the iPhone but I am at the SQLite vs CoreData crossroads. The main reason is that I can ... to be some way to do 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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595 views

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objective c - Loading images from a URL into a UITableViewCell's UIImageView

I have the following code: (Note: newsImageURL is an NSArray) NSString *imagesURL = @"http://aud.edu/images/ ... ; What am I doing 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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objective c - Skipping the Printing UI in IOS 8?

I could find some code for skipping the Printing UI and direct print through the Air Printer.But the code was ... or sample 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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437 views

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objective c - When to use instance variables and when to use properties

When using Objective-C properties can you stop creating instance variables altogether or do explicit instance ... would be inappropriate? See Question&Answers more detail:os...

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

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672 views

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objective c - UIScrollView direction of scrolling

I would like to copy the effect seen in Pinterest app, where they hide top and bottom bars depending on ... way the UIScrollView is scrolling? See Question&Answers more detail:os...

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

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734 views

1 answer

objective c - How can I compress data using Zlib, without directly using zlib.dylib?

Is there a class that allows compressing data using Zlib, or is using zlib.dylib directly the only possibility I have? See Question&Answers more detail:os...

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

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387 views

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objective c - When will completionBlock be called for dependencies in NSOperation

From the docs: The completion block you provide is executed when the value returned by the isFinished method changes ... , the child task ran. See Question&Answers more detail:os...

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

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382 views

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objective c blocks - How to use dispatch_queue_set_specific() and dispatch_get_specific()

I'm having a hard time finding good examples on how to use these functions. static void * kQueue1Key = "key1"; ... deadlock. What am I missing? See Question&Answers more detail:os...

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

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506 views

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objective c - Explicit getters/setters for @properties (MRC)

I've started programming on Objective-C language in the middle of 2012 in the time when ARC replaced MRC as ... if any other combinations exist) See Question&Answers more detail:os...

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

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346 views

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objective c - Displaying file copy progress using FSCopyObjectAsync

It appears after much searching that there seems to be a common problem when trying to do a file copy and show ... have seen in many threads!!) See Question&Answers more detail:os...

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

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603 views

1 answer

objective c - Universal iPhone/iPad AppDelegate

I was wondering if anyone would be able to tell me, starting a new app from scratch, how would I organise ... for the iPhone iOS for example? See Question&Answers more detail:os...

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

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648 views

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objective c - Add border and shadow to the buttons

I want to add medium thick black border and shadow to the buttons that I have added in my iPad application. I ... I add border and shadow to ht See Question&Answers more detail:os...

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

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726 views

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objective c - How to make marquee UILabel / UITextField / NSTextField

I need to make marquee UILabel in Xcode. The marquee will scroll from right to left. I tried CCScrollingLabel also ... NSTextField are OK 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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531 views

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objective c - What actually is a @selector?

There are some functions which take as an argument @selector(methodName). I used NSLog to find out what @selector ... passing the method name? See Question&Answers more detail:os...

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

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568 views

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objective c - how can i pass an int value through a selector method?

I want to pass an int value from my selector method, but the selector method takes only an object type parameter ... only getting the id 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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471 views

1 answer

objective c - UIKeyboardAppearance in UIWebView

With iOS7, we saw the introduction of UIKeyboardAppearance. Works great when applied to UITextView, but, as Apple ... No private APIs, please) See Question&Answers more detail:os...

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

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503 views

1 answer

objective c - Make my Cocoa app respond to the keyboard play/pause key?

Is there a way to make my app respond to the play/pause button on Mac? EDIT: Using the suggested code ... class NSApplication Why would that be? See Question&Answers more detail:os...

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

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323 views

1 answer

objective c - Images downloaded asynchronously only appear in UITableView after tap or scroll

I am successfully loading thumbnail images from blog posts asynchronously into my UITableView. The issue I'm having ... on the initial screen? See Question&Answers more detail:os...

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

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769 views

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objective c - NSTextView insert image in between text

Is it possible to insert an image (not a background image) into an NSTextView? Something like: Hi :) How ... have an NSTextView and an NSImage. See Question&Answers more detail:os...

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

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416 views

1 answer

objective c - Repeating OpenGL-es texture bound to hills in cocos2d 2.0

ORIGINAL ARTICLE I am in the process of trying to implement raywenderlich's tutorial on generating hills with ... .y); _hillTexCoords[_nHillVertices++] = CGPointMake(xTex0,...

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

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620 views

1 answer

objective c - Sending Mailcore2 Plain Emails in Swift

I've recently incorporated MailCore2 into my Objective-C project, and it has worked perfectly. Now, I am in the ... advance to all who reply. See Question&Answers more detail:os...

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

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571 views

1 answer

objective c - Cocoa-Touch - How parse local Json file

I'm newbie in iOS dev and I'm trying to parse a local Json file such as {"quizz":[{"id":"1", ... value separator' not expected after object key. 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 - How to find out if the NSURL is a directory or not

I have a NSURL object. It has address of a filesystem element, it is either a file or a directory. I want to ... else NSLog(@"was a folder"); See Question&Answers more detail:os...

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

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