Recent questions tagged objective

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objective c - How to throttle search (based on typing speed) in iOS UISearchBar?

I have a UISearchBar part of a UISearchDisplayController that is used to display search results from both local ... the remote server. Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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675 views

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objective c - How do I create a NSTimer on a background thread?

I have a task that needs to be performed every 1 second. Currently I have an NSTimer firing repeatedly every 1 ... efficient way of doing this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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422 views

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objective c - NSString to CFStringRef and CFStringRef to NSString in ARC?

I am trying to understand the correct way of getting an NSString from a CFStringRef in ARC? Same for ... this without creating memory leaks? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - iOS difference between isKindOfClass and isMemberOfClass

What is the difference between the isKindOfClass:(Class)aClass and the isMemberOfClass:(Class)aClass functions? I know ... of aClass: AnyClass). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - Git - how do I view the change history of a method/function?

So I found the question about how to view the change history of a file, but the change history of this ... feature exists for any SCM/language. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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635 views

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objective c - iOS 7 sizeWithAttributes: replacement for sizeWithFont:constrainedToSize

How do you return a multiline text CGSize from the new iOS 7 method sizeWithAttributes? I would like this to produce ... a single line of text. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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778 views

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objective c - How to convert an NSTimeInterval (seconds) into minutes

I've got an amount of seconds that passed from a certain event. It's stored in a NSTimeInterval data type. I ... to achieve this goal? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - How to check if an NSDictionary or NSMutableDictionary contains a key?

I need to check if an dict has a key or not. How? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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751 views

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objective c - boundingRectWithSize for NSAttributedString returning wrong size

I am trying to get the rect for an attributed string, but the boundingRectWithSize call is not respecting the size ... a rect for wrapped text? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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414 views

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objective c - If "a == b" is false when comparing two NSString objects

I have a class with an accessible method that passes back an NSString when called. [MyClass getMyString] The string ... 9 to i. Any thoughts? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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364 views

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objective c - How to Insert the UITextView into UIAlertview in iOS

Also, I would like this UITextView with the text file in XXX.txt.It works fine in iOS6, but content does ... :tosTextView]; [customAlert show]; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - How to bring application to foreground in ios?

I am detecting for iBeacon in background. When my device comes in a particular region application should comes to foreground. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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objective c - iOS: store two NSMutableArray in a .plist file

I want to store two NSMutableArray that I use as global array in AppDelegate. These two array are also store with ... them. Can You help me? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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584 views

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objective c - AVAudioPlayer stops playing immediately with ARC

I am trying to play an MP3 via AVAudioPlayer which I thought to be fairly simple. Unfortunately, it's not ... , otherwise, it works flawlessly. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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379 views

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objective c - iOS Protocol / Delegate confusion?

All this is my first post and I will try to be as precise as possible. I have read numerous articles about ... so what I am doing wrong? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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406 views

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objective c - Responding to touchesBegan in UIPickerView instead of UIView

I have a UIPickerView that gets faded out to 20% alpha when not in use. I want the user to be able to touch the ... can't seem to work it out. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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497 views

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objective c - Hide autolayout UIView : How to get existing NSLayoutConstraint to update this one

I know how to modify a existing constraint. But I would to know if someone has found a solution ... @"0." forAttribute:NSLayoutAttributeHeight] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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525 views

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objective c - Formatting a number to show commas and/or dollar sign

I want to format my UILabel with commas or better with a dollar sign and commas (with no decimal). Here is the ... xxx,xxx How do I do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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399 views

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objective c - Singleton in iOS 5?

Hi I had an implementation previous versions of iOS for a singleton as follows: .h file @interface CartSingleton : ... correct one? Thanks a lot See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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562 views

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objective c - Using Swift CFunctionPointer to pass a callback to CoreMIDI API

It may be that this is actually not possible currently, which would be unfortunate. I'm trying to call ... to the MIDIDestinationCreate API? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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296 views

1 answer

objective c - Is calling super in a category the same as calling it in a subclass?

Does calling [super init] do the same thing in a category as a subclass? If not, what's the difference? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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332 views

1 answer

objective c - Using NSRegularExpression to extract URLs on the iPhone

I'm using the following code on my iPhone app, taken from here to extract all URLs from striped .html code. I'm only ... ?\S+)?)?)? 0x1}" ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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556 views

1 answer

objective c - What is "error in __connection_block_invoke_2: Connection interrupted" in iOS?

I am tried to make iOS Application using AFNetworking in UITableView. TableView loads 20 datas like Twitter's timeline. ... I treat this error? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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416 views

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objective c - Combining a UILongPressGestureRecognizer with a UIPanGestureRecognizer

I d'like to combine a UILongPressGestureRecognizer with a UIPanGestureRecognizer. The UIPanGestureRecognizer should start ... finger around. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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397 views

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objective c - duplicate interface declaration for class 'test_coredataAppDelegate'

two errors suddenly fired in this piece of code - duplicate interface declaration for class 'test_coredataAppDelegate' ... please Best regards See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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492 views

1 answer

objective c - Localizing the Cut|Copy|Paste menu on iOS

Im having some issues localizing a danish app ive made. (The language, not the pastry) I have set ... are programmed as viewcontrollers. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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471 views

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objective c - Call instance method from class method

So I need to call some instance methods from class methods in Objective-C... Example : +(id)barWithFoo:(NSFoo *) ... is there a way to do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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600 views

1 answer

objective c - Add a running countup display timer to an iOS app, like the Clock stopwatch?

I'm working with an app that processes device motion events and updates interface in 5 second increments. I would ... by iOS for this purpose? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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