Represent Number Line in iphone app

I am looking to display number line in my application

How this can be done? I a开发者_Go百科lso want to control number like programatically

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you can use views with different sizes and background colours. Use #define -s for the fixed sizes.

You should have 3 functions: one that draws the horizontal red/blue rects

-(UIView *) drawHorizontal:(CGRect)frame withColor:(UIColor)theColor;

one that draws vertical spacers and labels underneath. Iterate for whole line width.

-(UIView *) drawVertical:(CGPoint)centerPosition withLabel:(int)number;

Your number line should be stored as an NSArray of NSDictionaries containing the position (index) and length of the horizontal red/blue lines.

Hope this helps.

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There's no easy standard component to do this. You will need to subclass UIView and override drawRect. Then you can use Core Graphics to draw the number line.