Sometimes we face the following problem: We have two tasks (or blocks) and we get errors because of the wrong synchonization. The reason is that the second block needs the first task to be completed. Imagine that the second task carries data processing in a NSMutableArray and this array gets data from a web service
What is your situation? Ok, let me tell you mine and probably you will find similarities. I get input data (strings) from a web service of a Public Greek Organization. The web service gets an xml document. There are 2 possible formats in xml: 1. The xml document is in UTF8 encoding If the
Considering that the development trends evolves rapidly and it’s good know what is going on there is one valuable source! Mr Dave Verwer has done beautiful background searching and editing in order to have every friday fresh developer news. Subscibe to the email list and be informed!
If you are testing your app in Xcode iPhone Simulator access the following folder: ~/Library/Application Support/iPhone Simulator/User/Applications/…/Documents Trouble to find user’s Library? Navigate to users home using Finder, click to Go from menu, then go to folder… and type ~/Library Done. Hmmm… and when you testing your app to iPhone? Use the Organizer from Xcode
Hmm, you are in a scene of a storyboard and you want to add a UIScrollView. Ok, from the utility area add Scroll View object on top of your scene. If you have already placed UI objects (like labels, textfileds etc), the scroll view will be on top of that. To overcame this, toy have
Many tutorials has been written based on older xCode versions. Before 4.2 there was a convenient “Windows based Application” containing a MainWindow.xib. So what if you want to code an older version tutorial having 4.2 xCode? Follow the steps bellow: 1. Create an “Empty Application” template project (remember to deselect Storyboards and ARC from the
This is a great new feature in iOS 5. New way of working using graphical interface in combination with new instance methods. Matthijs Hollemans published a useful tutorial regarding storyboards. A part that I found very useful is when he describes the mechanism of binding the source and the destination scene, read Here’s a handy
I’m reading about core data and I noticed (again) in application delegate file: where the we have only the decleration of properties without the instance variables. By googling around I found that: In Objective-C 2.0 on either of the modern runtimes (ie, Intel 64bit and ARM) properties can be added to classes ‘dynamically’ (that is,
For those who attend Stanford C193P iPhone development Lectures a useful list with all the walkthroughs and assignment is here. Notice that is about 2009 lectures.