Tag / objective-c

NSDateFormatter is excellent for date conversions in your iPhone App. We will use this to create a simple count down App. Here is core code using NSDateFormatter. Remember that NSDate Object in Mac OSX and iPhone are different. NSDate *date=[NSDate date]; int secondsNow=(int)[date timeIntervalSince1970]; NSDateFormatter *formatter=[[NSDateFormatter alloc] init]; [formatter setDateFormat:@"yyyy"]; int currentYear = [[formatter stringFromDate:date] intValue]; int nextYear=currentYear+1; NSString *nextYearBegin=[NSString stringWithFormat:@"%d0101",nextYear]; [formatter setDateFormat:@"yyyyMMdd"]; NSDate...

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I just started playing with Twitter API and was interested to see some good API's in objective-c. The one i started to look at is created by Matt Legend You can see his stuff here Anyway after simply checking(svn co) out his repository, I was able to quickly build a simple client very quickly Here is version 0.000001 alpha Matt nicely uses the standard way of doing things in objetive c with async calls - Delegate - call back mechanism Your View Controller or what ever has to simply implement the protocol MGTwitterEngineDelegate and you are getting responses from Twitter...

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This is a follow up post to my 2 previous posts on the same subject. Please check them here. iPhone SDK 3.0 - Playing with Map Kit iPhone SDK 3.0 - Playing with Map Kit - Part 2 We also started a basics training program in iPhone development. If you or some one you know wants to learn development and live around NYC area, Please promote this Blog Entry:http://blog.objectgraph.com/index.php/2009/05/13/iphone-developer-training-in-ny-city/ Meetup Group: http://www.meetup.com/iPhoneDeveloper Many of the users were asking me how to draw a polyline on this map. From what i can see in the documentation...

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So, I have been struggling to learn Objective C. Here is a snippet of code that might be helpful. Basically you can use NSString's initWithFormat method to create a new NSString object and use it just like sprinf function in C [[NSString alloc] initWithFormat:@"(%f,%f)",center.x,center.y]   

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