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Questions tagged [cgpoint]

CGPoint is a structure from Apple's Core Graphics framework. It is used to represent a point in two dimensions.

CGPoint is a C struct that contains information about the location of a point in two dimensions.

Fields:

  • x: The X location of the point
  • y: The Y location of the point
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CGpoint Vs CGPointMake

I have recently been introduced to swift. A question, when to use CGPoint and when shall I use CGPointMake ? I have interchanged these two statements and they both returned the same result self.anchorPoint = CGPointMake(0.5, 0.5) …
user2725255
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Cant check if CGPoint is not equal CGPointZero

I have a CGPoint declared in a UIView class, in my viewController I try to check if that CGPoint is not equal to CGPointZero, but I get this error:Invalid operands to binary expression ('CGPoint' (aka 'struct CGPoint') and 'CGPoint') This is the…
Arbitur
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Finding closest object to CGPoint

I have four UIViews on a UIScrollView (screen divided into quartiles) On the quartiles, I have a few objects (UIImageViews), on each quartile. When the user taps the screen, I want to find the closest object to the given CGPoint? Any ideas? I have…
Jordan
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iPhone SDK: Convert MKMapPoint to CGPoint

I have converted a longitude and latitude on my MapView to a MKMapPoint. I then want to move an imageView to that point using the imageViews center property. It seems that I somehow need to convert the MKMapPoint to a CGPoint so that I can change…
Nic Hubbard
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iOS get CGPoint from openCV cv::Point

In the above image ,we can see point which are drawn on image ,by some openCV algorithm. I want to draw a UIView point on those points ,so that user can crop it. I am not getting how will I access those points so that i can add uiview points. I…
Mukesh
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Objective-c: How to rotate CGRect

I've tried to rotate my rectangle, but it does not work properly. Here is part of my code, I found it in another post: #define DEGREES_TO_RADIANS(x) (M_PI * x / 180.0) -(void)drawRect:(NSRect)rect { CGContextRef cRef = [[NSGraphicsContext…
YU FENG
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Convert CLLocation or CLLocationCoordinate2D to CGPoint

How can I convert CLLocation or CLLocationCoordinate2D to CGPoint. I have seen CGPoint point = [mapView convertCoordinate:myCoordinates toPointToView:self.view]; But I don't need to use mapView in my case. I tried googling, but didn't come across…
Xavi Valero
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Autolayout breaks UIView Animation

Struggling to make my app work on both the iPhone 5 and the smaller iPhone's prior. Would be happy to require iOS6 and use Autolayout because that works great. However, the app has 4 buttons that regularly swap positions, so I assign each button a…
William Robinson
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How do I properly observe the contentOffset property of my scrollView subclass?

In my iOS app I am observing changes to the contentOffset property of my scrollView subclass. My observer handler looks like this: - (void)observeContentOffsetHandler:(id)aContentOffset { NSLog(@"%@", aContentOffset); } I chose the parameter…
dugla
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Image gets blurry and zoomed out when erasing

I am using functionality of erasing image and my code is like below. You can see Video HERE. Here current_sticker_img is my Imageview NOTE: I am also using Pan Gesture for zooming image //MARK: Eraser touch event override func touchesBegan(_…
Jitendra Modi
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finding location of specific characters in UILabel on iPhone

I have a UILabel with some text, say "Hello World abcdefg" The label can have multiple lines, different font sizes etc. Question: How do I find the coordinates of all letters "d" in this UILabel. Logical first step is find the position of those…
Nick
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How to convert between vector_float2 and CGPoint*?

What's the easiest/fastest way to convert between vector_float2 and CGPoint* in Objective-C? Does Apple provide any built-in functionality for this kind of type conversion? I noticed in 2-3 places in sample apps they just call CGPointMake() etc. to…
CodeSmile
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Arithmetic on two CGPoints with + or - operators

In Objective-C I'm starting to work with CGPoints and when I need to add two of them the way I'm doing it is this: CGPoint p1 = CGPointMake(3, 3); CGPoint p2 = CGPointMake(8, 8); CGPoint p3 = CGPointMake(p2.x-p1.x, p2.y-p1.y); I would like to be…
ndomin
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Initialisation of a CGPoint with { } notation

After CGPointMake let me down I found out that we can initalise a static const CGPoint like this instead: static const CGPoint p = { 0.f, 0.f }; It works but what is the curly bracket notation actually doing?
Danyal Aytekin
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How to check to see if one view is on top of another view?

Currently there is a scrollview (whole screen) that sits behind a uiview (bottom portion of the screen). I"m trying to check whether or not a label on the scroll is covered by the uiview (this happens with iphone se). Is there a way to check if the…
SwiftyJD
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