How to create line over UIButtons in ios? - iphone

Question

I have 8 UIButtons. Now I want to create line overs these buttons.
I tried and I am able to draw a line. Please check what I am doing.
MyDrawingView.h
#import <UIKit/UIKit.h>
#interface MyDrawingView : UIView{
CGPoint fromPoint;
CGPoint toPoint;
UIColor* currentColor;
UIImage *backgroundImage;
}
#property CGPoint fromPoint;
#property CGPoint toPoint;
#property(nonatomic,retain) UIColor* currentColor;
#end
MyDrawingView.m
#import "MyDrawingView.h"
#implementation MyDrawingView
#synthesize fromPoint;
#synthesize toPoint;
#synthesize currentColor;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
backgroundImage = [UIImage imageNamed:#"office.jpeg"];
}
return self;
}
- (void)drawRect:(CGRect)rect {
//CGPoint drawingTargetPoint = CGPointMake(100,0);
//[backgroundImage drawAtPoint:drawingTargetPoint];
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(context,10);
CGContextSetStrokeColorWithColor(context, currentColor.CGColor);
CGContextMoveToPoint(context,fromPoint.x , fromPoint.y);
CGContextAddLineToPoint(context, toPoint.x, toPoint.y);
CGContextStrokePath(context);
}
- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event
{
UITouch* touchPoint = [touches anyObject];
fromPoint = [touchPoint locationInView:self];
toPoint = [touchPoint locationInView:self];
[self setNeedsDisplay];
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch* touch = [touches anyObject];
toPoint=[touch locationInView:self];
[self setNeedsDisplay];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch* touch = [touches anyObject];
toPoint = [touch locationInView:self];
[self setNeedsDisplay];
}
Now in another class I am using 8 buttons on viewDidLoad , please check what I am doing.
-(void)viewDidLoad{
8 UIButtons (8 buttons in one line and 10 pixels gap in X-position after every button)
[self method_Call_drawView];
}
-(void)method_Call_drawView{
v = [[MyDrawingView alloc]initWithFrame:CGRectMake(100,350,400,400)];
v.backgroundColor = [UIColor whiteColor];
[v setNeedsDisplay];
[self.view addSubview:v];
}
.h file
#import <UIKit/UIKit.h>
#class MyDrawingView;
#interface iPad_Level1 : UIViewController{
UIButton *btn1;
UIButton *btn2;
UIButton *btn3;
UIButton *btn4;
UIButton *btn5;
UIButton *btn6;
UIButton *btn7;
UIButton *btn8;
MyDrawingView *v;
}
#property(nonatomic,retain)MyDrawingView *v;
#end
I am able to create view and draw a line on a view but I am not able to touch UIButtons and create a line over it.
My line is increasing and decreasing wherever I click but I want this line on my UIButton.
please check what I am trying to do itunes.apple.com/in/app/word-search-puzzles/id609067187?mt=8, check yellow and blue line on the buttons.
Any idea or suggestion would be highly welcome.

Answer 1

You ca add a 1px height sub view before the button you want.
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 200, self.view.bounds.size.width, 1)]; // change the 200 to fit your screen
lineView.backgroundColor = [UIColor blackColor];
[self.view addSubview:lineView];
And for moving this line when user click a button use:
[UIView animateWithDuration:0.5
delay:0.5
options: UIViewAnimationCurveEaseOut
animations:^
{
CGRect frame = lineView .frame;
frame.origin.y = 100; // for move
frame.size.width = 50; // for re-size
lineView .frame = frame;
}
completion:^(BOOL finished)
{
NSLog(#"Completed");
}
];

Answer 2

#import <QuartzCore/CAGradientLayer.h>
Import this and add quartzcore framework in the project
-(IBAction)btnTapped:(id)sender{
UIButton *m_btnTemp=((UIButton *)sender);
m_btnTemp.layer.borderColor=[UIColor blackColor];
m_btnTemp.layer.borderWidth= 1.0f;
}
When you want to remove the bordercolor set borderWidth=0;