objective-c

How to validate the email and phone numbers in Iphone sdk?

Hi Guys, I would like to validate the emails and the phone numbers in my app.but I dont have any idea to implememnt this.can any one give me suggestions how to implement this with a sample code. Anyone's help will be much appreciated. Thank You Monish ...

Dynamically calculate application load time

Hi again, How can I run a clock that allows me to measure the time to load until appDidFinishLaunching ? I want to set a sleep call that extends the Defaul.png show time to 3 seconds regardless the speed of the underlying hardware. ...

How to set editing is yes for a particular section in iPhone

I have declared UITableView in .h file. I have 5 section in the table view, now I need to set the tableview.editing= yes only for section 4. How can I display the + button beside section 4 and have all other sections in editing = NO? myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0,0,320,415) style:UITableViewStyleGrouped];...

Taking random string from text file Cocoa?

Having troubles finding a good way to get a string from a text file (separated by line breaks) randomly. I want to do a setStringValue:@"random string from file here"; pretty much. Thanks in advance. ...

How to load a table view when coming to back with out selection index

Hellow all, I am using navigation controller and have table views inside views. when i select any cell it it will navigate to another view. so,from there if i click back button it come sto previous view.But,it showing the cell which is selected previously. I dnt want this .it should not show which cell we selected previously. Could any o...

Meaning Of Etched Raised Separator in tableView

In tableView of Style grouped,what is the meaning of Etched Raised Separator? and how to use a 1 px line or "Etched Lowered" Styled line instead of Etched Raised separator. ...

How to release a "PopUp" view"?

I have this class that shows a popup. I do a alloc-init on it and it comes up. DarkVader* darkPopUp = [[DarkVader alloc] init:theButton helpMessage:[theButton.titleLabel.text intValue] isADay:NO offset:0]; It shows itself and if the user presses Ok it disappears. When do I release this? I could do a [self release] in the class when ...

How to change the SplitView from left,right to top,bottom on iPad?

I know that the SplitView is new to iPad, it split the screen with left and right. But I want to split the screen with top and bottom. How can I do so? thank u. ...

Component source for the Mac world

Do you know of any source of paid code components or library for XCode and the Objective-C language like Component Source ? It's a website for paid libraries of code that you can use in your project. In the past, when my team was working on a C# project I used two of them, DevExpress and GraphicsMill: We found them really useful. Now I'm...

EXC_BAD_ACCESS when simply casting a pointer in Obj-C

Hi all, Frequent visitor but first post here on StackOverflow, I'm hoping that you guys might be able to help me out with this. I'm fairly new to Obj-C and XCode, and I'm faced with this really... weird... problem. Googling hasn't turned up anything whatsoever. Basically, I get an EXC_BAD_ACCESS signal on a line that doesn't do any dere...

Random Number Generator

- (IBAction)randomnum{ int randomNumber1 = 1+ arc4random() %(49); label1.text = [NSString stringWithFormat:@"d", randomNumber]; Local declaration of randomNumber hides instance variable. How can i get round this warning? thanks ...

What is the UI element on iPad Photos App?

Please see the youtube: http://www.youtube.com/watch?v=FC95ARd96wI notice that the 0:35 , the iPad bottom have a thin photo bar. Is it a private API or I need to create my own or Which UI Element will it be? Thz. ...

Tab-Bar not hiding on all views

I have a tab-bar controller that loads a RootView. The RootView has 4 buttons that will load a UITableView I don't want my tab-bar to be visible in the RootView so I added the following code: -(void)viewDidLoad{ self.hidesBottomBarWhenPushed = YES; } When I initially load the app the tab-bar doesn't appear, but when I click on a ...

objective-c - calling one constructor from another

Say you had the following two constructors: - (id)initWithTitle:(NSString *)title; - (id)initWithTitle:(NSString *)title page:(NSString *)page; The second constructor is no different from the first, except that it sets up the member variable "page". Since it basically has to do the same thing, is there a way to call the first one fro...

Is it possible to have multiple tab-bar controllers in an app?

I would like to design an app that has a RootView with 4 buttons. Clicking on each button will load another view that has its own tab-bar controller. The tab-bar controller for each of the views is different. If so, how do I go about implementing this? ...

Objective-C Decimal to Base 16 Hex conversion

Does anyone have a code snippet or a class that will take a long long and turn it into a 16 byte Hex string? I'm looking to turn data like this long long decimalRepresentation = 1719886131591410351; and turn it into this //Base 16 Hex Output: 17DE435307A07300 The %x operator doesn't want to work for me NSLog(@"Hex: %x",decimalRep...

If I start learning C on Ubuntu will it give me an edge when I start learning Objective-C later this summer?

I know Ruby right now, however I want to learn a new language. I am running Ubuntu 10.04 right now but I am going to get a Mac later this summer. Anyways I want something more for GUI development. I was wondering if I should learn C on Ubuntu right now, and then learn Objective-C when I get an iMac? Will learning C give me an edge? Or sh...

Objective-C: Getting the True Class of Classes in Class Clusters

Recently while trying to answer a questions here, I ran some test code to see how Xcode/gdb reported the class of instances in class clusters. (see below) In the past, I've expected to see something like: PrivateClusterClass:PublicSuperClass:NSObject Such as this (which still returns as expected): NSPathStore2:NSString:NSObject ......

UITableView details as a subview

Hi all, I have a UITableView in iPhone with enough cell to make it scrollable. I would like to have a subview display whenever I click on a cell, rather than using the navigation controller behaviour. The problem is that I cannot calculate the CGRect exactly to have the subview always centered in page, because the CGRect is calculated ...

Adding rows to UItableview and passing data between Viewcontrollers

I have a list of websites in a plist, when the app loads this populates a tableview (which is inside a navigation controller) But I have added an add button to the navigation bar and then created another View Controller to deal with inputting of the new website (Like Title and URL). It is very similar to how the contacts app looks. Ther...