IOS: verify if a point is inside a rect

Question

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.

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)

In swift you can do it like this:

let isPointInFrame = frame.contains(point)

"frame" is a CGRect and "point" is a CGPoint

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];