2014/10/15 下午 10:12:48

iphone Programming Glossary: point.x

iPhone: How to draw line between two points on MapKit?

http://stackoverflow.com/questions/10598322/iphone-how-to-draw-line-between-two-points-on-mapkit

MKMapPoint point MKMapPointForCoordinate coordinate if idx 0 northEastPoint point southWestPoint point else if point.x northEastPoint.x northEastPoint.x point.x if point.y northEastPoint.y northEastPoint.y point.y if point.x southWestPoint.x.. coordinate if idx 0 northEastPoint point southWestPoint point else if point.x northEastPoint.x northEastPoint.x point.x if point.y northEastPoint.y northEastPoint.y point.y if point.x southWestPoint.x southWestPoint.x point.x if point.y southWestPoint.y.. else if point.x northEastPoint.x northEastPoint.x point.x if point.y northEastPoint.y northEastPoint.y point.y if point.x southWestPoint.x southWestPoint.x point.x if point.y southWestPoint.y southWestPoint.y point.y pointArr idx point self.routeLine..

How do I determine if a coordinate is in the currently visible map region?

http://stackoverflow.com/questions/1197398/how-do-i-determine-if-a-coordinate-is-in-the-currently-visible-map-region

if point is in view. Is there a better way then this point mapView convertCoordinate coordinate toPointToView nil if point.x 0 point.y 0 Add coordinate to array that is later added to mapView So I am asking convertCoordinate where the point would..

Detect touches only on non-transparent pixels of UIImageView, efficiently

http://stackoverflow.com/questions/13291919/detect-touches-only-on-non-transparent-pixels-of-uiimageview-efficiently

pixel 1 1 8 1 NULL kCGImageAlphaOnly UIGraphicsPushContext context image drawAtPoint CGPointMake point.x point.y UIGraphicsPopContext CGContextRelease context CGFloat alpha pixel 0 255.0f BOOL transparent alpha 0.01f return transparent..

Drag UIView around Shape Comprised of CGMutablePaths

http://stackoverflow.com/questions/13664615/drag-uiview-around-shape-comprised-of-cgmutablepaths

int index self handlePathPointIndexWithOffset offset CGPoint proposedHandlePoint pathPoints_ index return hypotf point.x proposedHandlePoint.x point.y proposedHandlePoint.y You could speed things up by using squared distances to avoid the square..

UIScrollView works as expected but scrollRectToVisible: does nothing

http://stackoverflow.com/questions/1446536/uiscrollview-works-as-expected-but-scrollrecttovisible-does-nothing

am making do without scrollRectToVisible CGPoint point myRect.origin if clefScrollView pointInside point withEvent nil point.x 0 if point.y clefScrollView.contentSize.height clefScrollView.bounds.size.height point.y clefScrollView.contentSize.height..

NSLog with CGPoint data

http://stackoverflow.com/questions/1476532/nslog-with-cgpoint-data

anyObject CGPoint point touch locationInView self I want to get the x coordinate value into my console log NSLog @ x s point.x When I use this log output for this is x null I have verified that point is not null when this is called using the debugger..

Adjusting the line to fit our head in imageview

http://stackoverflow.com/questions/15402377/adjusting-the-line-to-fit-our-head-in-imageview

CGRectMake 0 0 25 25 CGPoint point recognizer locationInView testVw.superview float wChange 0.0 hChange 0.0 wChange point.x prevPoint.x Slow down increment hChange point.y prevPoint.y Slow down increment testVw.bounds CGRectMake testVw.bounds.origin.x..

Getting pixel data from UIImageView — works on simulator, not device

http://stackoverflow.com/questions/1911360/getting-pixel-data-from-uiimageview-works-on-simulator-not-device

when deployed to the device. I should say not always the odd thing is that it does fetch the correct pixel colour if point.x point.y otherwise it gives me pixel data for a pixel on the other side of that line as if mirrored. So a tap on a pixel.. CGImage size_t width CGImageGetWidth cgImage size_t height CGImageGetHeight cgImage NSUInteger x NSUInteger floor point.x NSUInteger y height NSUInteger floor point.y if x width y height CGDataProviderRef provider CGImageGetDataProvider cgImage..

OpenGL ES (iPhone) Touch Picking

http://stackoverflow.com/questions/2231433/opengl-es-iphone-touch-picking

WAY Here is some code void handleTouch CGPoint point GLfloat width backingWidth GLfloat height backingHeight GLfloat x point.x GLfloat y point.y GLfloat z 0.0f viewport normalized dev coord clip GLfloat n 2 x width 1 2 y height 2 z 1 1 float fov 45.0f..

How to erase part of an image as the user touches it

http://stackoverflow.com/questions/2978382/how-to-erase-part-of-an-image-as-the-user-touches-it

is what you want UIImage erasePointinUIImage IplImage image CGPoint point int r r is the radious of the erasing int a point.x int b point.y int position int minX minY maxX maxY minX a r 0 a r 0 minY b r 0 b r 0 maxX a r image width a r image width..

How can I group MKAnnotations automatically regarding zoom level?

http://stackoverflow.com/questions/3194646/how-can-i-group-mkannotations-automatically-regarding-zoom-level

CGPoint point mapView_ convertCoordinate an.coordinate toPointToView nil CGPoint roundedPoint roundedPoint.x roundf point.x 10 10 roundedPoint.y roundf point.y 10 10 NSValue value NSValue valueWithCGPoint roundedPoint MKAnnotationView av mapView_..

Find the tangent of a point on a cubic bezier curve (on an iPhone)

http://stackoverflow.com/questions/4089443/find-the-tangent-of-a-point-on-a-cubic-bezier-curve-on-an-iphone

t p1.y p2.y p3.y p4.y the following code simply draws an indication of the tangent CGPoint demo CGPointMake point.x vel.x 0.3 point.y vel.y 0.33 the only reason for the .3 is to make the pointers shorter UIColor whiteColor setStroke UIBezierPath..

iPhone smooth sketch drawing algorithm

http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm

points count i NSValue value points objectAtIndex i CGPoint point value getValue point CGContextAddLineToPoint context point.x point.y CGContextStrokePath context UIGraphicsPushContext context And now I want to improve the drawing tobe more like Sketch..

How to write text on image in objective-c iPhone?

http://stackoverflow.com/questions/6992830/how-to-write-text-on-image-in-objective-c-iphone

image.size image drawInRect CGRectMake 0 0 image.size.width image.size.height CGRect rect CGRectMake point.x point.y image.size.width image.size.height UIColor whiteColor set text drawInRect CGRectIntegral rect withFont font UIImage..

UIScrollView : paging horizontally, scrolling vertically?

http://stackoverflow.com/questions/728014/uiscrollview-paging-horizontally-scrolling-vertically

if _isHorizontalScroll _isMultitouch CGPoint point touches anyObject locationInView self if fabsf _originalPoint.x point.x kThresholdX fabsf _originalPoint.y point.y kThresholdY _isHorizontalScroll YES _currentChild touchesCancelled event touchesForView..

Overlay an image over another image in iOS

http://stackoverflow.com/questions/7313023/overlay-an-image-over-another-image-in-ios

FALSE 0.0 bgImage drawInRect CGRectMake 0 0 bgImage.size.width bgImage.size.height fgImage drawInRect CGRectMake point.x point.y fgImage.size.width fgImage.size.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..