[objective-c] Forum Topics

i have these code for get image pixel data: typedef std::vector<BYTE> pixeldata; pixeldata GetImagePixel(HDC hdcImage) { BITMAP bmp = {0}; BITMAPINFO Info = {0}; memset( &bmp, 0, sizeof(BITMAP) ); HBITMAP hBitmap =(HBITMAP) GetCurrentObject(hdcImage, OBJ_BITMAP); GetObject(hBitmap, sizeof(BITMAP), &bmp); BITMAPINFO info { }; info.bmiHeader.biSize = sizeof(info.bmiHeader); info.bmiHeader.biWidth = bmp.bmWidth; // pay attention …

#import "Person.h" @class Asset; //i have used import "Asset.h" which contains definition for asset @interface Employee : Person { int employeeID; NSMutableArray *assets; } @property int employeeID; - (void)addAssetsObject:(Asset *)a; - (unsigned int)valueOfAssets; @end I got this snippet from objective c book. In the second line , author has used …

I expected there to be one, especially on a site as popular as this one.

I am trying to send data from a UITableView into any type of database. I have 2 questions. 1: What type of database should I use (ex. MySQL, access)? 2: How will I transfer the database from a table view to the type of database I should use? PS: Please …

Hi ,i have a contact form made with xib file it works but i can't change the background color of the view programmatically i tryed with this but nothing, i know how to put an image background but i need to change the color on the fly how can i …

I keep running this code and it works until I press the button, `findShapeCalc()`, and then I get EXC_BAD_INSTRUCTION in the main.swift at the line `NSApplicationMain(C_ARGC, C_ARGV)`. Why does this keep happening? Code in question: import Cocoa class ViewController: NSViewController { @IBOutlet var dropDown : NSPopUpButton @IBOutlet var length : …

Hi guys, I'm hoping someone here can help. I am to develop an application for a project which keeps track of tennis scores. Having not been a tennis fan whatsoever during my life I am in need of some assistance developing the ontology (rules) for the apps logic. Can anyone …

Hi guys, I am completely new to objective c. I am trying to compile a very basic program of "hello world", but the problem is that gcc compiler can't figure out where my header files are. I wrote on cygwin bash shell: [CODE =c]$ gcc -lobjc hello.m -o hello[/CODE] and …

I need to compare two numbers in a cocoa application, but it doesn't allow me to use the regular signs (>=, <=, <, >) nor will it let me use isGreaterThanOrEqualTo:[] (Which, I undestand only takes an object, but I thought I would try it). So can someone please tell …

Hi All, So i have recently started developing an application in XCode for a project that I am working on. The application uses php scripts to connect to a mysql server. The problem I am facing is that when I coded textfields to send the information to the server when …

I want to set a text field to look through a switch statement to find the corresponding case. Can I just do that like this? switch(textField){ case 'someCase': // do something break; default: // do something else break; } Considering I already created an outlet for it in the @interface …

Everytime I press the button, it's supposed to change the label, but it doesn't. It also doesn't see that I have made any connections. Please help. Thank you in advance. AppController.m: #import "AppController.h" @implementation AppController -(IBAction)sayHello:(id)sender{ [label setStringValue:@"Hello World!"]; } @end AppController.h: #import <Foundation/Foundation.h> @interface AppController : NSObject{ IBOutlet NSTextField …

I'm going through an exercise in a mac programming in cocoa book, where there is a GUI and from a textfield I enter and to a list of strings displayed on a table. There are plenty of things that aren't working, the most confusing of which is I keep leaking …

hi, i have sent you already text for objective c tutorial, but unfortunately i didn't get any reply from you. if you send me objective C tutorial i would grateful to you. Thanks Antor

I've been at this for hours - I am trying to display a barcode font in a label. Sounds simple but apparently isn't. I've added the font ttf to the project and added it to the UIAppFont array in the project p-list but the text appears normally (defaults to the …

Hi guys, it's been a frustrating day so far, I've taken the week off to get to grips with Xcode and produce an application for the iPhone. Wishing I hadn't now! Anyway, I'm slightly stuck in my conquest... I collasped the "Scene" panel when storyboarding and now I need it …

This is my code: [CODE]//++++++++++++++++++++++++++++++++++++++++++++++++++++++++ - (void)viewDidLoad { [super viewDidLoad]; NSString *indexPath = [NSBundle pathForResource:@"iHelp" ofType:@"html" inDirectory:nil]; [webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:indexPath]]]; [/CODE] The app is crashing because 'nil' for directory name is invalid (DUH!). So for an imbedded html file, what should go there?

I had my iPhone app working, developed with Storyboard. I decided to take all of the methods that belonged in a SQLite method and move them to a new SQLite class (.h and .m). Now I have errors that I can't seem to get rid of. The basic problem is …

Never Mind the title of the post guys and gals… it turns out that writing the post helped me vent my frustration and clear my mind. I found the issue and solved the problem while I was writing the initial post! I'm writing this because I haven't figured out how to …

Could someone help me to convert this Scheme Code to Objective-C? (define-type RCFAE [num (n number?)] [add (lhs RCFAE?) (rhs RCFAE?)] [id (name symbol?)] [fun (param symbol?) (body RCFAE?)] [app (fun-expr RCFAE?) (arg-expr RCFAE?)] [with (id symbol?) (named-expr RCFAE?) (body RCFAE?)] [if0 (cond RCFAE?) (then RCFAE?) (else RCFAE?)] [rec (id …

Writing a small program that requires me to convert strings to doubles and then back to strings. Right now, the code compiles but the answer is wrong, even though I am using an algorithm that I know is right in C++. Can someone tell me what I'm doing wrong? The …

I have been doing java for almost 3 years now, am just starting to learn Objective-C as of this past June. Been writing a few programs on my own and writing programs for the exercises in 2 very cool Cocoa/objective-c books. My question is how do I, coming from Java, …

I have started dabbling in Objective-C for iOS developing. Is using the C forum of this website appropriate for questions regarding Objective-C? If not, what would the correct forum be? Thanks!

I see some comments about Objective C or Cocoa however their does note seem to be a specific area for such comments. Objective C would be a good listing below the other languages. Any serious OSx iPad or iPhone developers would look here first for information. Since there is more …

i get an undefined reference to _objc_class_name_greeter error when I compile When I remove the line Greeter * Hi=[[greeter alloc] init]; it compiles and all but one option works any idea what's wrong with that line Also the error is at .data+0xa4 and correction it actually happens during linking ? …