Draw line in UIView

Question

I need to draw a horizontal line in a UIView  What is the easiest way to do it  For example  I want to draw a black horizontal line at y-coord 200   I am NOT using Interface Builder

User · Answer

One other  and an even shorter  possibility  If you re inside drawRect  something like the following     UIColor blackColor  setFill   UIRectFill  CGRect  0 200 rect size width 1

User · Answer

You can user UIBezierPath Class for this   And can draw as many lines as you want   I have subclassed UIView         interface MyLineDrawingView                NSMutableArray  pathArray         NSMutableDictionary  dict path         CGPoint startPoint  endPoint                 property  nonatomic retain    UIBezierPath  myPath       end   And initialized the pathArray and dictPAth objects which will be used for line drawing  I am writing the main portion of the code from my own project    -  void drawRect  CGRect rect        for NSDictionary   pathDict in pathArray                   UIColor     pathDict valueForKey   color    setStroke      this method will choose the color from the receiver color object  in this case this object is  strokeColor             pathDict valueForKey   path   strokeWithBlendMode kCGBlendModeNormal alpha 1 0                dict path objectForKey   color   setStroke      this method will choose the color from the receiver color object  in this case this object is  strokeColor        dict path objectForKey   path   strokeWithBlendMode kCGBlendModeNormal alpha 1 0        touchesBegin method    UITouch  touch    touches anyObject   startPoint    touch locationInView self   myPath   UIBezierPath alloc init   myPath lineWidth   currentSliderValue 2  dict path     NSMutableDictionary alloc  init     touchesMoved Method   UITouch  touch    touches anyObject   endPoint    touch locationInView self      myPath removeAllPoints            dict path removeAllObjects     remove prev object in dict  this dict is used for current drawing  All past drawings are managed by pathArry          actual drawing      myPath moveToPoint startPoint        myPath addLineToPoint endPoint         dict path setValue myPath forKey   path         dict path setValue strokeColor forKey   color                           NSDictionary  tempDict    NSDictionary dictionaryWithDictionary dict path                          pathArray addObject tempDict                          dict path removeAllObjects        self setNeedsDisplay     touchesEnded Method           NSDictionary  tempDict    NSDictionary dictionaryWithDictionary dict path            pathArray addObject tempDict            dict path removeAllObjects            self setNeedsDisplay

User · Answer

Swift 3 and Swift 4 This is how you can draw a gray line at the end of your view  same idea as b123400 s answer  class CustomView  UIView        override func draw   rect  CGRect            super draw rect                   if let context   UIGraphicsGetCurrentContext                 context setStrokeColor UIColor gray cgColor              context setLineWidth 1              context move to  CGPoint x  0  y  bounds height               context addLine to  CGPoint x  bounds width  y  bounds height               context strokePath

User · Answer

Based on Guy Daher s answer   I try to avoid using   because it can cause an application crash if the GetCurrentContext   returns nil   I would do nil check if statement   class CustomView  UIView            override func draw   rect  CGRect                 super draw rect          if let context   UIGraphicsGetCurrentContext                         context setStrokeColor UIColor gray cgColor              context setLineWidth 1              context move to  CGPoint x  0  y  bounds height               context addLine to  CGPoint x  bounds width  y  bounds height               context strokePath

User · Answer

The easiest way in your case  horizontal line  is to add a subview with black background color and frame  0  200  320  1    Code sample  I hope there are no errors - I wrote it without Xcode    UIView  lineView     UIView alloc  initWithFrame CGRectMake 0  200  self view bounds size width  1    lineView backgroundColor    UIColor blackColor    self view addSubview lineView    lineView release      You might also keep a reference to this view     if you are about to change its coordinates     Just create a member and a property for this      Another way is to create a class that will draw a line in its drawRect method  you can see my code sample for this here

User · Answer

Maybe this is a bit late  but I want to add that there is a better way  Using UIView is simple  but relatively slow  This method overrides how the view draws itself and is faster   -  void drawRect  CGRect rect        super drawRect rect        CGContextRef context   UIGraphicsGetCurrentContext        CGContextSetStrokeColorWithColor context   UIColor redColor  CGColor           Draw them with a 2 0 stroke width so they are a bit more visible      CGContextSetLineWidth context  2 0f        CGContextMoveToPoint context  0 0f  0 0f     start at this point      CGContextAddLineToPoint context  20 0f  20 0f     draw to this point         and now draw the Path      CGContextStrokePath context

User · Answer

Add label without text and with background color corresponding frame size ex height 1   Do it through code or in interface builder

User · Answer

Just add a Label without text and with background color  Set the Coordinates of your choice and also height and width  You can do it manually or with Interface Builder

[ios] Draw line in UIView

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