UIColor System Colors

C4WorkSpace.m

//
//  C4Workspace.h
//  Examples
//
//  Created by Travis Kirton
//

#import "C4Workspace.h"

@interface C4WorkSpace ()
-(void)setupShapes;
-(void)setupLabels;
@end

@implementation C4WorkSpace {
    //we use an array of shapes and for() loops to set styles
    NSArray *shapes;
}

-(void)setup {
    [self setupShapes];
    [self setupLabels];
    
    //We cast each object in the array to a C4Shape object, and then set its color
    ((C4Shape *)[shapes objectAtIndex:0]).fillColor = [UIColor underPageBackgroundColor];
    ((C4Shape *)[shapes objectAtIndex:1]).fillColor = [UIColor scrollViewTexturedBackgroundColor];
    ((C4Shape *)[shapes objectAtIndex:2]).fillColor = [UIColor viewFlipsideBackgroundColor];
    ((C4Shape *)[shapes objectAtIndex:3]).fillColor = [UIColor darkTextColor];
    //lightTextColor is actually white with 60% opacity
    ((C4Shape *)[shapes objectAtIndex:4]).fillColor = [UIColor lightTextColor];
    //on iPad groupTableViewBackgroundColor is equivalent to [UIColor clearColor]
    ((C4Shape *)[shapes objectAtIndex:5]).fillColor = [UIColor groupTableViewBackgroundColor];
}

-(void)setupShapes {
    //create a frame for building each shape
    CGRect frame = CGRectMake(0, 0, self.canvas.width*0.9f, self.canvas.height/9.0f);
    
    //create an array of 6 shapes
    shapes = [NSArray arrayWithObjects:
              [C4Shape rect:frame],
              [C4Shape rect:frame],
              [C4Shape rect:frame],
              [C4Shape rect:frame],
              [C4Shape rect:frame],
              [C4Shape rect:frame],
              nil];
    
    //create a point that we can update to se the position of each object
    CGPoint center = self.canvas.center;
    CGFloat dy = self.canvas.height / 7.0f;
    center.y = dy;
    
    //for every shape, update its linewidth, position and add it to the canvas
    for(C4Shape *s in shapes) {
        s.lineWidth = 0.0f;
        s.center = center;
        center.y += dy;
        [self.canvas addShape:s];
    }
    
    //[UIColor lightTextColor] is actually WHITE, with a 0.6 opacity
    //So, we set it to darkTextColor to see the difference between it and it's label
    ((C4Shape *)[shapes objectAtIndex:4]).backgroundColor = [UIColor darkTextColor];
    
    ((C4Shape *)[shapes objectAtIndex:5]).shadowOffset = CGSizeMake(5,5);
    ((C4Shape *)[shapes objectAtIndex:5]).shadowOpacity = 0.8f;
    ((C4Shape *)[shapes objectAtIndex:5]).lineWidth = 1.0f;
    ((C4Shape *)[shapes objectAtIndex:5]).strokeColor = C4GREY;
}

-(void)setupLabels {
    //create a font for the labels
    C4Font *f = [C4Font fontWithName:@"ArialRoundedMTBold" size:20.0f];
    C4Label *l;
    
    //create an array of texts for the labels
    NSArray *labelTexts = [NSArray arrayWithObjects:@"underPageBackgroundColor",
                           @"scrollViewTexturedBackgroundColor",
                           @"viewFlipsideBackgroundColor",
                           @"darkTextColor",
                           @"lightTextColor",
                           @"groupTableViewBackgroundColor",nil];
    
    //create a label for each shape and add it to the canvas
    for(int i = 0; i < [labelTexts count]; i ++) {
        l = [C4Label labelWithText:(NSString *)[labelTexts objectAtIndex:i] font:f];
        //all labels will be white except the last two
        if(i < 4) l.textColor = [UIColor lightTextColor];
        else l.textColor = [UIColor darkTextColor];
        l.center = ((C4Shape *)[shapes objectAtIndex:i]).center;
        [self.canvas addLabel:l];
    }
}
@end