objective-c

What's the best/easiest way to compare two times in Objective-C?

I've got a string representation of a time, like "11:13 AM." This was produced using an NSDateFormatter and the stringFromDate: method. I'd like to compare this time to the current time, but when I use the dateFromString: method to turn the string back into a date, a year, month and day are added - which I don't want. I just need to kno...

UINavigationBar Background Image Problem

i have set my navigationbar background with this code in my App delegate: @implementation UINavigationBar (UINavigationBarCategory) - (void)drawRect:(CGRect)rect { UIImage *backgroundImage = [UIImage imageNamed: @"Nav-rightpane.png"]; CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, sel...

Custom color my UIActivityIndicatorView

I would like to have my UIActivityIndicatorView be colored a custom color. Is there any way to set this property? ...

Prevent header from being updated after calling reloadData?

I have a UITableView with a custom header that maintains some state. When I call reloadData to change/update the data in the UITableView, the header gets reloaded too. Is there any way to prevent this behavior in order to maintain state in the table's header? ...

Adding two NSDate

Hi guys, I've got two NSDate, date and time. I'd like to add them in such a manner that I get the date from date and time from time. Any suggestions on how I do this? Cheers Nik ...

Is there any parallel in Objective-C to C#'s yield keyword

The first time I saw the yield keyword in C# I thought "yuck what a way to junk up the language". Having grown since then and actually used the language I find it so pleasantly simple to express state logic that I'd like to use a similar approach in other development platforms. I'm exploring Objective-C for some support utilities. Is ...

Changing pointer of self

I have an object that I alloc/init like normal just to get a instance. Later in my application I want to load state from disk for that object. I figure I could unarchive my class (which conforms to NSCoding) and just swap where my instance points to. To this end I use this code... NSString* pathForDataFile = [self pathForDataFile]; if([...

How to develop an app for Mac OS X that keeps reading everything the user types in?

Hello, everybody. I'm here to ask if any of you know how to develop an app for Mac OS X that keeps reading everything the user types in. An example of app that implements this behavior is Text Expander. Text Expander reads everything the user types in, searching for abbreviations previously added on it. When one of this abbreviations i...

Presenting/dismissing modal view controller which contains a table makes the table go down

I present/dismiss modal view controller with tableview in it. Each presenting/dismissing causes the table to move down, leaving a gap between the table and top of the view. so each time i present after a dismiss, i see my table going down one row-height distance . keeping the routine, the table really 'leaves ' the screen. Please help. ...

how do i scroll through 100 photos in UIScrollView in IPhone

I'm trying to scroll through images being downloaded from a users online album (like in the facebook iphone app) since i can't load all images into memory, i'm loading 3 at a time (prev,current & next). then removing image(prev-1) & image (next +1) from the uiscroller subviews. my logic works fine in the simulator but fails in the device...

Adding Help to a Cocoa App

I want to add a simple one-page HTML page help to my Cocoa app. Can you tell me how to do it? I assume I just have to throw in one lousy .html (and maybe one .css?) file somewhere into my Cocoa project in Xcode? ...

Objective-C / UIButton / SetTitle

Does the setTitle method of UIButton retain the NSString passed as argument ? I guess I can rely on the fact that the property is defined as: property(nonatomic,readonly,retain) UILabel *titleLabel In this case, I think that it does retain the string. Thanks, Apple92 ...

Send AppleScript to remote computer in Objective-C

How do you use Objective-C (iPhone) to send an AppleScript to a remote computer (on same network) to be executed? I think something like NSNetService would be of use here, but I don't know. EDIT: Ok, to clarify, all I want to do is send a command ID or something and then the Computer associate that with the corresponding AppleScript co...

NSColor, 10.6 and Gamma 2.2

With Snow Leopard the default gamma changed from 1.8 to 2.2. I happen to be working on a few Mac apps that use a very dark custom colour scheme provided by Cocoa. On 10.5 it looks fine but on 10.6 with the new gamma it's much darker and really hard on the eyes. The colour scheme is defined using numerous [NSColor colorWithCalibratedRe...

UIKeyboardBoundsUserInfoKey is deprecated, what to use instead?

Hi, I'm working on an iPad app using 3.2 sdk. I'm dealing with obtaining the keyboard size to prevent my textfields from hidding behind it. I'm getting a Warning in Xcode -> UIKeyboardBoundsUserInfoKey is deprecated what should I use instead not to get this warning? ...

Asynchronous callback for network in Objective-C Iphone

I am working with network request - response in Objective-C. There is something with asynchronous model that I don't understand. In summary, I have a view that will show my statuses from 2 social networks: Twitter and Facebook. When I clicked refresh, it will call a model manager. That model manager will call 2 service helpers to reques...

How does Apple update the Airport menu while it is open? (How to change NSMenu when it is already open)

I've got a statusbar item that pops open an NSMenu, and I have a delegate set and it's hooked up correctly (-(void)menuNeedsUpdate:(NSMenu *)menu works fine). That said, that method is setup to be called before the menu is displayed, I need to listen for that and trigger an asynchronous request, later updating the menu while it is open, ...

Reading a .doc (MSWord) file in ObjectiveC ?

Hi All, Is it possible to read a .doc (MSWord) file in ObjC ? Or Is there any other way to read the word file ? Thanks ...

UIWebView - How to Disable Action Sheets (UIActionSheet)?

Hey, I would like to know how you can disable UIActionSheets, specifically the Action Sheets being displayed after tapping and holding hyperlinks in a UIWebView. These seem to be enabled by default in UIWebViews containing the link address of the respective link in the title of the alert. They are also enabled in Safari. (How) is it po...

How can I expose an Objective-C function to JavaScript using WebKit on Mac OS X?

I understand to do this on the iPhone you need to trap link requests (as per my other iPhone question UIWebView Expose JavaScript) and you can easily do the reverse and access JavaScript from Obj-C code. However, I would like to have JavaScript be able to call some Objective-C functions that would somehow be registered with WebKit. I a...