IOS verify if a point is inside a rect

Question

Is there a way to verify if a CGPoint is inside a specific CGRect    An example would be   I m dragging a UIImageView and I want to verify if its central point CGPoint is inside another UIImageView

User · Accepted Answer

Swift 4  let view       let point       view bounds contains point    Objective-C  Use CGRectContainsPoint     bool CGRectContainsPoint CGRect rect  CGPoint point    Parameters   rect     The rectangle to examine  point    The point to examine  Return Value true if the rectangle is not null or empty and the point is located within the rectangle  otherwise  false    A point is considered inside the rectangle if its coordinates lie inside the rectangle or on the minimum X or minimum Y edge

User · Answer

In Swift that would look like this   let point   CGPointMake 20 20  let someFrame   CGRectMake 10 10 100 100  let isPointInFrame   CGRectContainsPoint someFrame  point    Swift 3 version   let point   CGPointMake 20 20  let someFrame   CGRectMake 10 10 100 100  let isPointInFrame   someFrame contains point    Link to documentation   Please remember to check containment if both are in the same coordinate system if not then conversions are required  some example

User · Answer

UIView s pointInside withEvent  could be a good solution  Will return a boolean value indicating wether or not the given CGPoint is in the UIView instance you are using  Example   UIView  aView    UIView alloc initWithFrame CGRectMake 0 0 100 100   CGPoint aPoint   CGPointMake 5 5   BOOL isPointInsideView    aView pointInside aPoint withEvent nil

User · Answer

I m starting to learn how to code with Swift and was trying to solve this too  this is what I came up with on Swift s playground      Code var x   1 var y   2 var lowX   1 var lowY   1 var highX   3 var highY   3   if  x  y   gt    lowX  lowY   amp  amp   x  y   lt    highX  highY         print  inside     else       print  not inside       It prints inside

User · Answer

In objective c you can use CGRectContainsPoint yourview frame  touchpoint   - void touchesBegan  NSSet lt UITouch   gt    touches withEvent  UIEvent   event  UITouch  touch    touches anyObject   CGPoint touchpoint    touch locationInView self view   if  CGRectContainsPoint yourview frame  touchpoint        else        In swift 3 yourview frame contains touchpoint    override func touchesBegan   touches  Set lt UITouch gt   with event  UIEvent         let touch UITouch   touches first      let touchpoint CGPoint   touch location in  self view      if wheel frame contains touchpoint           else

User · Answer

In swift you can do it like this   let isPointInFrame   frame contains point     frame  is a CGRect and  point  is a CGPoint

User · Answer

It is so simple you can use following method to do this kind of work -  - BOOL isPoint  CGPoint point insideOfRect  CGRect rect       if   CGRectContainsPoint rect point           return  YES    inside     else         return  NO    outside     In your case you can pass imagView center as point and another imagView frame as rect in about method   You can also use this method in bellow UITouch Method    - void touchesBegan  NSSet   touches withEvent  UIEvent   event

User · Answer

-  void touchesBegan  NSSet lt UITouch   gt    touches withEvent  UIEvent   event              UITouch  touch     event allTouches  anyObject               CGPoint touchLocation    touch locationInView self view               CGRect rect1   CGRectMake vwTable frame origin x               vwTable frame origin y  vwTable frame size width               vwTable frame size height               if  CGRectContainsPoint rect1 touchLocation               NSLog   Inside                else             NSLog   Outside

[ios] IOS: verify if a point is inside a rect

Swift 4

Objective-C

Examples related to ios

Examples related to uiview

Examples related to collision-detection

Examples related to cgrect

Examples related to cgpoint