found some quickies for meself :-)
making an int from NSNumber:
int myInt = (int)[(NSNumber *)numberObject intValue];
also floatValue
making NSNumber from int:
NSNumber *mynumberObj = [NSNumber numberWithInt: 255]
making a String from int:
NSString *myString = [NSString stringWithFormat:@"%d", myInt];
making an int from a String:
int myInt = [mySTring intValue];
concatenating two strings:
NSString *myString1 = [@"field" stringByAppendingString: myString1];
than a useful blog showing how to draw on a view in all details, lines, text, an image
http://trailsinthesand.com/exploring-iphone-graphics-part-1/
(you have to mirror the text, for instance....text is drawn in reverse in default.)
while drawing like an artist you might run out of space, then you need the UIScrollView, this is a bit .... peculiar too: it seems you have to trick the interfacebuilder in believing the wrong things: first connecting the outlets, then changing the File's Owner to UISCrollView and it shows "errors" with the former outlets, while they work fine (?) Anyway here is a good tuto:
http://blog.atrexis.com/index.cfm/2008/9/29/Interface-Builder-Tutorial
