Recent questions tagged objective

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objective c - Core Text calculate letter frame in iOS

I need to calculate exact bounding box for every each character (glyph) in NSAttributedString (Core Text) ... CGContextRestoreGState(context); } 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 can I connect iPhone and web service and get XML data?

I know how to connect to web server using an iPhone but now I have to connect the iPhone to a web service ... . Does anyone have any ideas? 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 - Declare a block method parameter without using a typedef

Is it possible to specify a method block parameter in Objective-C without using a typedef? It must be, like ... other combinations I've tried. 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 do I debug with NSLog(@"Inside of the iPhone Simulator")?

I'm used to programming and having log messages be viewable. I know you used to be able to use ... an iPhone Xcode development environment? 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 - Do I set properties to nil in dealloc when using ARC?

I am trying to learn Automatic Reference Counting in iOS 5. Now the first part of this question should be easy: ... about this when using ARC. See Question&Answers more detail:os...

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

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555 views

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objective c - How do I convert NSMutableArray to NSArray?

How do I convert NSMutableArray to NSArray 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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objective c - How do you print out a stack trace to the console/log in Cocoa?

I'd like to log the call trace during certain points, like failed assertions, or uncaught exceptions. 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 - Iphone: Checkmarks in UITableview get mixed up when scrolling

I have a bit of a problem where my check marks that i apply to my rows in my UITableView ... accessoryType = UITableViewCellAccessoryNone; } } 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 - iphone: try end try

Is there in objective-C any way to see if it is possible to do a certain task without risking crash the ... what is the syntax? 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 - object with the name of a string

if I create an object of a class, I do: Item *item01 = [[Item alloc] init]; but how do I give it a name I ... ??? = [[Item alloc] init]; 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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298 views

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objective c - ios: using the same sqlite parameter more than once causes premature memory deallocation

Note: the question is misleading.. i thought it was using more than one parameter that causes a ... libsystem_c.dylib`_pthread_wqthread + 441 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 - NSDateFormatter producing (null) SQLite and iOS 5.1

Maybe somebody can help explain why I am getting a null value when converting a string to a date. It all ... circles. Any help much appreciated. 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 - Getting an array of a property from an object array

I need to extract an array of a single property from a custom object array. eg. @interface MyClass : NSObject { ... the PHP and LINQ sections. See Question&Answers more detail:os...

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

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316 views

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objective c - Why is my comparing if statement not working?

Why is the following code (in cocoa) not working? NSString *extension = [fileName pathExtension]; NSString * ... think it SHOULD do. 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 - symbol(s) not found for architecture armv6

Please help me from the below error. I am working on graphs using 3rd party framework (libIPhonecharting), every ... ld returned 1 exit status See Question&Answers more detail:os...

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

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432 views

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objective c - Why is my string potentially unsecure in my iOS application?

I am initializing a mutable string and then logging it as follows. NSMutableString* mStr = [[NSMutableString ... potentially insecure). Why? See Question&Answers more detail:os...

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

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410 views

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objective C: write in a csv (txt) string contained in some textfield

In my project I have a view where I write words in some textfield, when I press a button these string must ... csvString); is exactly my string 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 - In 10. power / calculation / Power calculations

i am working on an apps for calculating fuel... i need to know how i can power a number in 10? the Excel code is "10^1.5" See Question&Answers more detail:os...

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

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598 views

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objective c - iOS 5 Black screen after segue

I have an iOS 5 application with a storyboard and two scenes. Scene 1 is a selection list while Scene 2 shows ... 't see anything on my screen. See Question&Answers more detail:os...

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

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614 views

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objective c - Fetching IP address of router to which iPhone is connected

I want to fetch the IP address of the router (WiFi access point) to which my iPhone is connected wirelessly. The ... help with a piece of code? See Question&Answers more detail:os...

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

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425 views

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objective c - How to inherit from NSDictionary?

I have an object called Settings that inherits from NSMutableDictionary. When I try to initialize this object using ... am I missing? 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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498 views

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objective c - Removing object from NSMutableArray

I stumbled across the following shortcut in setting up a for loop (shortcut compared to the textbook examples I ... to use the longer format? See Question&Answers more detail:os...

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

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368 views

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objective c - Removing leading zeroes from a string

I have a string 0023525631 but what I want is the string 23525631 -- without the leading zeroes. How do I 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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266 views

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objective c - why most of the objects we create in iphone are pointers

why most of the objects we create in iphone are pointers..? like i create NSString *str, NSMutableDictionary *dict.. etc See Question&Answers more detail:os...

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

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391 views

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objective c - Book App Tutorial iphone

I am totally beginner in programming. I played a bit with xcode. But my question is: How to make an ... you for your attention and 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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351 views

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objective c - Shifting view after displaying modal - possibly AutoLayout related

I present a simple view with a couple of labels and a button, all inside a UIScrollView and laid ... . BEFORE PRESENTATION AFTER PRESENTATION See Question&Answers more detail:os...

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

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282 views

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objective c - How to display application icon in menubar even application is quit

My application shows a icon in the menu bar but when the application is quit the icon goes off from the menu bar ... even it is quit. 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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374 views

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objective c - Passing data between classes

I have developed a quiz game and everything works really well but there is a thing I want to improve: My ... better solution? 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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