Recent questions tagged objective

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objective c - Custom navigationItem button with QLPreviewController in iOS6

my goal is to use QLPreviewController in my iPad application for iOS6, using my custom Action item button in ... Any suggestion? Thanks, bye See Question&Answers more detail:os...

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

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512 views

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objective c - Disable Warning Dialog if Bluetooth is powered off iOS

My ios application uses bluetooth to connect to an accessory. If Bluetooth is not enabled, a popup appears asking me to ... ? Thanks you a lot ! See Question&Answers more detail:os...

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

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427 views

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objective c - Get word from tap in UITextView

I'm trying to get a word from a tap. The following function's sender is from the UIGesture on the UITextView, ... it prints the word out as NULL 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

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objective c - Automatic Reference Counting Issue: Passing address of non-local object to __autoreleasing parameter for write-back

I'm trying to pass pointer to pointer to a method, but apparently ARC has some issues with ... :&propertyNames] : NULL; 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 - Skip to Previous AVPlayerItem on AVQueuePlayer / Play selected Item from queue

I am playing a Tv-show that has been sliced to different chapters on my project using an AVQueuePlayer. I ... would also appreciate the link. See Question&Answers more detail:os...

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

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524 views

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objective c - How to perform binary search on NSArray?

What is the simplest way to do a binary search on an (already) sorted NSArray? Some potential ways I have spotted ... 4.3+ 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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370 views

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objective c - Front most window using CGWindowListCopyWindowInfo

In the documentation, it says that list of windows returned by this method: CFArrayRef windowList = ... most apps. 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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367 views

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objective c - The application cannot be opened because its executable is missing

I have an application that I have been developing for some time now. Recently launching the application via a double ... > </dict> </plist> 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 - Under ARC, are Blocks automatically copied when assigned to an ivar directly?

Assume the following code under ARC, typedef void (^MyResponseHandler) (NSError *error); @interface MyClass : ... = [responseHandler copy]. See Question&Answers more detail:os...

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

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508 views

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objective c - No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=i386)

While using the iphone simulator 64 bit, i'm getting the following architecture error. Also using the xcode 5.0. Any suggestions. See Question&Answers more detail:os...

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

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693 views

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objective c - Create a high priority serial dispatch queue with GCD

How can I create a custom serial queue that runs at high priority? Right now I'm using myQueue = ... allow for setting a priority? 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 - Listen to all touch events in an iOS app

Is it possible to somehow listen to, and catch, all the touch events occurring in an app? The app I'm ... events? Any ideas or suggestions? 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 - Defeating the "multiple methods named 'xxx:' found" error

In my current project inside the file ViewController.m, I am running the method: [[connection writer] writeData: ... why does this error happen? See Question&Answers more detail:os...

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

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464 views

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objective c - How can I pad an integer on the left with zeros?

I have the following variable: NSNumber *consumption = [dict objectForKey:@"con"]; Which returns 42. How can I ... if it were 420, 0000000420 See Question&Answers more detail:os...

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

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532 views

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objective c - How do I find information on other applications running on the computer on Mac/Cocoa/Obj-C?

I want to find which applications are running, particularly I want to know which one has a window that has focus ... of the window (if 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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319 views

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objective c - Draw a Custom cell for tableview (UITableView), with changed colors and separator color and width

I want to draw the background of a UITableViewCell which has a grouped style. The problem with me is I am ... this gives me transparent cell. See Question&Answers more detail:os...

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

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425 views

1 answer

objective c - iPhone UILabel sizeWithFont:

I'm trying to measure the visual size of a NSString that takes into account the number of lines I can render. ... do this using the iPhone SDK? See Question&Answers more detail:os...

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

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526 views

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objective c - Cocoa - Gaining Root Access for NSFileManager

I need to move system files with NSFileManager in my application and I don't seem to have root access. What ... given approval by the user. See Question&Answers more detail:os...

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

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465 views

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objective c - iTunes File Sharing app: realtime monitoring for incoming datas

I'm working on iOS project that supports iTunes file sharing feature. The goal is realtime tracking incoming/ ... each file inside .bundle See Question&Answers more detail:os...

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

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505 views

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objective c - IPhone simple phone number validation

I find all kinds of phone number validations on stackoverflow for the iphone but none seem to validate they just seem ... %@", textValue); } } See Question&Answers more detail:os...

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

0 votes

505 views

1 answer

objective c - Get the screenshot of a streaming video on iphone

How can i get the screenshot of a streaming video on iphone. I tried several methods. UIGetScreenImage() - ... besides AVFoundation. Thank you. See Question&Answers more detail:os...

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

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311 views

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objective c - Why dereferencing a NSString pointer is not necessary?

In the example NSString *message = @"Hello"; message = @"World"; If message is just a pointer why don't I need ... = @"World"; like in 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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300 views

1 answer

objective c - How to draw inside the black edges in iOS SDK with OpenGL ES?

Refer the below-attached images, how to paint inside the black edges without using masking [Ex- If we want to draw ... ] [IMAGE 3] [IMAGE 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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464 views

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objective c - Drag UIView between UIViews

I have a UIView object X that is contained in an UIView object A. I want to be able to touch X and remove it ... add self as a subview. } @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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418 views

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objective c - iOS7 strange animation when using hidesBottomBarWhenPushed

I am getting a really strange animation behaviour when pushing another view controller that has the bottom bar hidden with ... can I fix that? See Question&Answers more detail:os...

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

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535 views

1 answer

objective c - CI Filter to create Black & White image?

I have a CIImage I need to convert from color to Black and White within my Cocoa / objective C program. Peter ... can be used for this? 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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382 views

1 answer

objective c - Creating a tutorial for my iOS app with page control

I'm trying to create a tutorial for my application with Page Control. I'm not entirely sure ... + UINagivationController or UIViewController? See Question&Answers more detail:os...

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

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374 views

1 answer

objective c - CCCrypt decrypting in AES CBC works even without IV

I have a confusing problem, where decrypting a file which was encrypted using CCCrypt's AES-CBC mode with a randomized, ... 1]; } return data; } See Question&Answers more detail:os...

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

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