So I need to make a simple app in Xcode 4.2, I already have the layout set, there is just one thing I'm stuck on. I need to make a calculator in which someone could input several numbers which would go into an equation then when you click submit the result pops up on the page.
For example
Estimated Hourly rate:
Estimated material cost:
Estimated Hours:
then you would click submit and on the next page you would see
Approximate cost:
Now the thing I need to know is how to use that formula in Xcode and get the next screen to display that cost. Any help is appreciated!
Start with Empty View template, in IB add labels and UITextField for each of input value, then add UIButton. Connect everything to your variables in *.h, synthesize them in *.m file. Create IBAction for UIButton, where you read values user entered in UITextFields, perform your formula then display it to user.
I would suggest to You reading some basic tutorials, it's pretty simple App.
If you are looking for a tutorial about how to make a calculator on iPhone, check
iPad and iPhone Application Development iTunes U free courses here: http://itunes.apple.com/us/itunes-u/ipad-iphone-application-development/id473757255
It is on iTunes U by Paul Hegarty from Standford University. This is a great tutorial used by lots of developers, and I highly recommand this course. The very first or two classes was how to implement a calculator. That is a simple mathmatical calculator which is probably different from what you need, but you can get some useful ideas from it.
Hope this helps.
Related
Im looking at adding a tutorial kind of thing to my app. Basically I want to be able to give a quick message across of what the parts in the app do. I want the users to see it once and not again. I have searched relentlessly for this but I always found app building tutorials.
A lot of games have what I want but I cannot for the life of me find how to do it or, what it is called to find a tutorial. Could someone please help me out.
Thanks in advance,
Sam
You'll need to build it yourself.
What I usually do is, on top of the view i want to explain, add a semi transparent view with some arrows pointing at stuff and a small text/button explaining it. All of that has to be modal and you can save in the NSUserDefaults if the user has already seen it/skipped it/launched the app for the first time. You'd have a method that builds all those views and you simply call it in viewDidLoad (by checking against a simple boolean value store in those previously mentioned NSUserDefaults, for example)
I am trying to implement the following kind of tabs into my Application. I have first tried it with creating buttons. So can anyone guide me how to create this kind of interface ?
I want to clarify that this are the groups & it will be dynamically created & it can be in any number.
Any suggestions & references will be highly appreciated.
Thanks in advance.
I've been implementing pretty much exactly what you are asking in an app im working on, i've uploaded the source files here. its pretty much plug-and-play, just make a TabView where you want your tabs and hook up the delegate methods. can swap out all the images with your own (my tabs were underneath something and not on top so they will look upside down initially for you).
Dont really have time to explain the inner workings of it all, but if you play around with the code im sure you will manage to customise it how you want. otherwise, just learn from it and implement your own.
edit: oh and there is some code that changes how the tabs look depending if iOS 7 or not, you will get an error when first importing it because i have a variable in my appDelegate isIOS7 which you can either implement in your app, or just take out all the relevant iOS 7 checks in the code
I have seen a few grids made with UITableView but I don't really like how close together each cell is to the other. If there is a way of creating a grid system like the home screen on an iphone (the screen after it is unlocked) if would be great. I don't need an exact solution but a point in the right direction, maybe a set of libraries to look through would be great. I am running xcode 4.4.1
Thanks!
The key is UIScrollView has a paging mode (since could have more buttons than fit in the view). It's covered here's in Apple ocs:
http://developer.apple.com/library/ios/#documentation/WindowsViews/Conceptual/UIScrollView_pg/ScrollViewPagingMode/ScrollViewPagingMode.html
If you use that, each 'page' would have n buttons/views that when clicked would call a protocol/delegate call back for the consumer with the data to handle and it would evenly layout the UIView/buttons across that page view. Contact me if you want my sample.
You probably don't want to require iOS6 as a minimum requirement but if you do, you can do as H2CO3 suggested in the comment and us UICollectionview. Here's a tutorial: http://www.raywenderlich.com/22324/beginning-uicollectionview-in-ios-6-part-12
There's also some open source launchers that you can look into their code. Here's some (I'm sure there's more).
http://www.cocoacontrols.com/platforms/ios/controls/sespringboard
Code is at: https://github.com/sarperdag/SESpringBoard
Also: http://www.cocoacontrols.com/platforms/ios/controls/openspringboard
Use UICollectionView. You can create grid type views using that. It is available in iOS 6.
If you can target iOS 6+, use UICollectionView. It's one of the best new things in iOS for years and it will be as important as UITableView.
The layout you're asking for is only a few lines of code.
NSHipster has a good explanation of UICollectionViews and Ray Wenderlich has a good tutorial.
(There's lots of example code out there, but here's a very simple example project I did recently for another question involving UICollectionViews)
I want to create an application excacly like appStore.
A nice table (I have the source code from apple using custom table cell)
But my main problem is that I cannot find a nice tutorial or a guide on how to make the product detail page.
I want to have a label at the top then a text and after that I want to have the images.
I notice that in appStore when you reach the images it locks there for a while!
How can I do that???
I tried using a UIScrollView but I believe this is not the case.
I am thinking using tableView again with custom cells but again I am not sure.
Any ideas? or any good working example? or tutorial?
thanks for your time :)
start from here:
http://blog.webscale.co.in/?p=284
Which will teach you basic table design skills and how to create custom cells with images on the left.
Then if you would like to learn how to create a tab bar application an be able to have a navigation controller at the top then you can follow this descriptive tutorial step by step to achieve this.
http://www.devx.com/wireless/Article/44897
What do you get after following these two tutorials?
the appStore application, well not exactly but you will get your own version.
EDIT: Added Details page how to achieve appStore like UIScrollView effect.
follow this brilliant video tutorial.
http://blog.sallarp.com/iphone-ipad-appstore-like-uiscrollview-with-paging-and-preview/
Have fun
PK
Then
I simply want to link a label to a slider in order for it to display the current value of that slider. This is my first time working with Objective-C, and the problem seems far more complicated than in Java or C#.
This is the first thing you will see demonstrated in the Stanford CS193P videos on iTunes - if you want to do it in Interface Builder look no further.