Recent questions tagged objective

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objective c - Email validation on textField in iOS

In iOS App, how to add Email validation on UITextField? See Question&Answers more detail:os...

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

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624 views

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objective c - Fullscreen UIView with Status bar and Navigation Bar overlay on the top

What is the proper way to implement the status bar and navigation bar that go on top of an ... .com/20081217-t78sdixk37hqgdh1ia2fgec4st.png 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 - What's the difference between a method and a selector?

What the difference between a method, a selector and a message in Objective-C? See Question&Answers more detail:os...

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

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464 views

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objective c - iphone Core Data Unresolved error while saving

I am getting a strange error message from the core data when trying to save but the problem that the error ... that it appears at random times 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 7 parallax effect in my view controller

I'm developing an app for iOS 7 in Objective-C. I've got a screen in my app with a few buttons and a ... I implement that effect in my own app? See Question&Answers more detail:os...

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

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660 views

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objective c - how to get rowNum like column in sqlite IPHONE

I have an Sqlite database table like this (with out ascending) But i need to retrive the table in Ascending ... ROWNUM LIKE COLUMN IN SQLITE See Question&Answers more detail:os...

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

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530 views

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objective c - uilabel tail truncation

Im working on an ios app using objective c and i have an issue with uilabel that i could use some help with ... on this would be great 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 - What is an NSCFDictionary?

I'm getting an NSCFDictionary returned to me and I can't figure out how to use it. I know it's of type ... I need a cast of some kind? See Question&Answers more detail:os...

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

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832 views

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objective c - How to set Image in Tabbar not Tint color in ios?

I have an application with UITabbar , I want to set image in Tabbar but am unable to set ... [targetTabBarItem setSelectedImage:selectedIcon]; 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 - CCAvenue iOS kit integration kit

I am trying to integrate CCAvenue payment integration in iOS. They have given me two library files named: libcrypto.a and ... 0.1 and iOS 7.0+ See Question&Answers more detail:os...

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

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441 views

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objective c - Accuracy of NSTimer

I am trying to use NSTimer to create a Stop-watch style timer that increments every 0.1 seconds, but it ... tweak to make it accurate. 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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397 views

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objective c - What is the cost of using autorelease in Cocoa?

Most of Apples documentation seems to avoid using autoreleased objects especially when creating gui views, but I want ... stringWithEtc...] ? See Question&Answers more detail:os...

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

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549 views

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objective c - Detecting iPhone/iPod Touch Accessories

Is it possible to detect if the iPod Touch/iPhone has any headphones or other accessories connected to it? ... /microphone accessory from Apple. See Question&Answers more detail:os...

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

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369 views

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objective c - How to get iPhone crash log from customers?

Does anyone knows how to get crash logs from customers? Instead of manually asking them to sync and go to this ... crash report to our server? See Question&Answers more detail:os...

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

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404 views

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objective c - UIButton events. What's the difference?

I've encountered a problem where my button should remain "pressed down" while it shows popover called from it. Popover ... I couldn't find it. See Question&Answers more detail:os...

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

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465 views

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objective c - NSDate is 5 hours off

I run the following code: NSDate *now = [NSDate date]; NSLog(@"now: %@", now); and get : 2011-09-16 ... Is this an Xcode4 issue or NSDate issue? See Question&Answers more detail:os...

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

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535 views

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objective c - iOS Screenshot part of the screen

I have an App that takes a screenshot of a UIImageView with the following code: -(IBAction) screenShot: (id ... how to position this correctly. See Question&Answers more detail:os...

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

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419 views

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objective c - How can I add forward class references used in the -Swift.h header?

I'm integrating Swift code into a large Objective-C project, but I'm running into problems when my Swift code ... Objective-C code in my app? See Question&Answers more detail:os...

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

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455 views

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objective c - Why does ARC retain method arguments?

When compiling with ARC, method arguments often appear to be retained at the beginning of the method and ... so feels quite disgusting. See Question&Answers more detail:os...

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

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673 views

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objective c - Avoiding "NSArray was mutated while being enumerated"

I have an NSMutableArray that stores mousejoints for a Box2d physics simulation. When using more than one finger to ... it from the world). See Question&Answers more detail:os...

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

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531 views

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objective c - AVCaptureSession and background audio iOS 7

Whenever I start an AVCaptureSession running with the microphone as an input it cancels whatever background music is ... . Thanks for help! See Question&Answers more detail:os...

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

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487 views

1 answer

objective c - How can I have a UIBarButtonItem with both image and text?

When I try to use an image for a UIBarButtonItem, the text isn't shown. Is there a way to show both the text and the image? 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 - Instance variables declared in ObjC implementation file

I was watching the WWDC ARC introduction video and I saw something I've never seen in ObjC before when some ... use of the @private directive. See Question&Answers more detail:os...

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

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421 views

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objective c - iTunes Song Title Scrolling in Cocoa

I have searched extensively and cannot for the life of me find any information about how to achieve a similar effect ... an NSTimer, but alas. See Question&Answers more detail:os...

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

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741 views

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objective c - Write UIImage along with metadata (EXIF, GPS, TIFF) in iPhone's Photo library

I am developing a project, where the requirements are: - User will open the camera through the application - Upon ... saved. Thanks in advance. See Question&Answers more detail:os...

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

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565 views

1 answer

objective c - iOS 7 UITextView vertical alignment

How is that possible that my editable UITextView (placed inside a straightforward UIViewController inside a UISplitView that ... return YES; } See Question&Answers more detail:os...

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

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533 views

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objective c - Compiler error "expected method not found" when using subscript on NSArray

I wrote this simple code to try out the new Objective-C literal syntax for NSArrays: NSArray *array = @[@"foo ... screenshot of the error, too. See Question&Answers more detail:os...

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

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569 views

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objective c - Detect iOS device type

In my application (written in Objective-C), how do I detect if the device is an iPhone, iPad, or iPhone5? if([[ ... } else { // [ipad] } See Question&Answers more detail:os...

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

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