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2014/10/15 ¤U¤È 10:13:12
iphone Programming Glossary: rectangleHow would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone color changes In the drawRect method you'll want to draw the image first then overlay it with a rectangle filled with the color you want along with the proper blending mode something like this void drawRect.. self.frame self.image.CGImage Blend mode could be any of CGBlendMode values. Now draw filled rectangle over top of image. CGContextSetBlendMode context kCGBlendModeMultiply CGContextSetFillColor context..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller like to achieve something like an expand animation that means the new view expands from a given rectangle lets say 100 100 220 380 during the animation to full screen. Any suggestions where to start respectively..
Programmatically align a toolbar on top of the iPhone keyboard http://stackoverflow.com/questions/158574/programmatically-align-a-toolbar-on-top-of-the-iphone-keyboard Safari when you're navigating form elements for example . Currently I am specifying the toolbar's rectangle with constants but because other elements of the interface are in flux toolbars and nav bars at the..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew a transpose due to convention of using row or column vectors. To obtain the transform to convert a rectangle X Y W H to any quadrilateral x1a y1a x2a y2a x3a y3a x4a y4a use this function you may need a transpose..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file it's time to draw to it Starts our first page CGContextBeginPage pdfContext pageRect Draws a black rectangle around the page inset by 50 on all sides CGContextStrokeRect pdfContext CGRectMake 50 50 pageRect.size.width..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer aColor setFill CGContextAddPath context visiblePath CGContextFillPath context Now create a larger rectangle which we're going to subtract the visible path from and apply a shadow CGMutablePathRef path CGPathCreateMutable.. context CGContextSetShadowWithColor context CGSizeMake 0.0f 1.0f 3.0f aColor CGColor Now fill the rectangle so the shadow gets drawn aColor setFill CGContextSaveGState context CGContextAddPath context path CGContextEOFillPath.. Set the fill color you want add this path to the context and fill the context Now create a larger rectangle that can bound the visible path. Before closing this path add the visible path. Then close the path..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d a rectangle image into a quadrilateral using a CATransform3D I have an image and a set of four points describing..
How would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone retain self setNeedsDisplay fires off drawRect each time color changes In the drawRect method you'll want to draw the image first then overlay it with a rectangle filled with the color you want along with the proper blending mode something like this void drawRect CGRect area CGContextRef context UIGraphicsGetCurrentContext.. context Draw picture first CGContextDrawImage context self.frame self.image.CGImage Blend mode could be any of CGBlendMode values. Now draw filled rectangle over top of image. CGContextSetBlendMode context kCGBlendModeMultiply CGContextSetFillColor context CGColorGetComponents self.overlayColor.CGColor CGContextFillRect..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller show a custom animation when pushing a view controller I would like to achieve something like an expand animation that means the new view expands from a given rectangle lets say 100 100 220 380 during the animation to full screen. Any suggestions where to start respectively any documents tutorials links Alright. I could make the..
Programmatically align a toolbar on top of the iPhone keyboard http://stackoverflow.com/questions/158574/programmatically-align-a-toolbar-on-top-of-the-iphone-keyboard add a toolbar to the top of the iPhone keyboard as in iPhone Safari when you're navigating form elements for example . Currently I am specifying the toolbar's rectangle with constants but because other elements of the interface are in flux toolbars and nav bars at the top of the screen every time we make a minor interface change..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew on the CATransform3DMake functions. You may need to perform a transpose due to convention of using row or column vectors. To obtain the transform to convert a rectangle X Y W H to any quadrilateral x1a y1a x2a y2a x3a y3a x4a y4a use this function you may need a transpose function compute_transform_matrix X Y W H x1a y1a x2a y2a..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file CFRelease url Done creating our PDF Context now it's time to draw to it Starts our first page CGContextBeginPage pdfContext pageRect Draws a black rectangle around the page inset by 50 on all sides CGContextStrokeRect pdfContext CGRectMake 50 50 pageRect.size.width 100 pageRect.size.height 100 This code block will create..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer visiblePath Fill this path UIColor aColor UIColor redColor aColor setFill CGContextAddPath context visiblePath CGContextFillPath context Now create a larger rectangle which we're going to subtract the visible path from and apply a shadow CGMutablePathRef path CGPathCreateMutable when drawing the shadow for a path whichs bounding.. 0.0f green 0.0f blue 0.0f alpha 0.5f CGContextSaveGState context CGContextSetShadowWithColor context CGSizeMake 0.0f 1.0f 3.0f aColor CGColor Now fill the rectangle so the shadow gets drawn aColor setFill CGContextSaveGState context CGContextAddPath context path CGContextEOFillPath context Release the paths CGPathRelease path.. essentially there are the following steps Create your path Set the fill color you want add this path to the context and fill the context Now create a larger rectangle that can bound the visible path. Before closing this path add the visible path. Then close the path so that you create a shape with the visible path subtracted..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d a rectangle image into a quadrilateral using a CATransform3D I have an image and a set of four points describing a quadrilateral Q . I want to transform this image so that..
UIView's frame, bounds, center, origin, when to use what? http://stackoverflow.com/questions/1071112/uiviews-frame-bounds-center-origin-when-to-use-what the visible area for the application and setup their initial UIView's frame accordingly. Why is there an frame rectangle and an bounds rectangle in an UIView Hopefully this helps clarify the circumstances where each property might get used... for the application and setup their initial UIView's frame accordingly. Why is there an frame rectangle and an bounds rectangle in an UIView Hopefully this helps clarify the circumstances where each property might get used. share improve this answer..
How would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone off drawRect each time color changes In the drawRect method you'll want to draw the image first then overlay it with a rectangle filled with the color you want along with the proper blending mode something like this void drawRect CGRect area CGContextRef.. context self.frame self.image.CGImage Blend mode could be any of CGBlendMode values. Now draw filled rectangle over top of image. CGContextSetBlendMode context kCGBlendModeMultiply CGContextSetFillColor context CGColorGetComponents..
Cocoa: What's the Difference between the frame and the bounds? http://stackoverflow.com/questions/1210047/cocoa-whats-the-difference-between-the-frame-and-the-bounds and did not understand iphone cocoa touch cocoa uiview share improve this question The bounds of an UIView is the rectangle expressed as a location x y and size width height relative to its own coordinate system 0 0 . The frame of an UIView is.. as a location x y and size width height relative to its own coordinate system 0 0 . The frame of an UIView is the rectangle expressed as a location x y and size width height relative to the superview it is contained within. So imagine a view that..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller controller I would like to achieve something like an expand animation that means the new view expands from a given rectangle lets say 100 100 220 380 during the animation to full screen. Any suggestions where to start respectively any documents..
Programmatically align a toolbar on top of the iPhone keyboard http://stackoverflow.com/questions/158574/programmatically-align-a-toolbar-on-top-of-the-iphone-keyboard as in iPhone Safari when you're navigating form elements for example . Currently I am specifying the toolbar's rectangle with constants but because other elements of the interface are in flux toolbars and nav bars at the top of the screen every..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew may need to perform a transpose due to convention of using row or column vectors. To obtain the transform to convert a rectangle X Y W H to any quadrilateral x1a y1a x2a y2a x3a y3a x4a y4a use this function you may need a transpose function compute_transform_matrix..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file our PDF Context now it's time to draw to it Starts our first page CGContextBeginPage pdfContext pageRect Draws a black rectangle around the page inset by 50 on all sides CGContextStrokeRect pdfContext CGRectMake 50 50 pageRect.size.width 100 pageRect.size.height..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer UIColor redColor aColor setFill CGContextAddPath context visiblePath CGContextFillPath context Now create a larger rectangle which we're going to subtract the visible path from and apply a shadow CGMutablePathRef path CGPathCreateMutable when drawing.. CGContextSaveGState context CGContextSetShadowWithColor context CGSizeMake 0.0f 1.0f 3.0f aColor CGColor Now fill the rectangle so the shadow gets drawn aColor setFill CGContextSaveGState context CGContextAddPath context path CGContextEOFillPath context.. Create your path Set the fill color you want add this path to the context and fill the context Now create a larger rectangle that can bound the visible path. Before closing this path add the visible path. Then close the path so that you create a..
Distance moved by Accelerometer http://stackoverflow.com/questions/6645126/distance-moved-by-accelerometer moved by Accelerometer I want to move objects on iPhone screen rectangle circle and so on by moving iPhone. For example I move iPhone along X axis and the object moves along X axis. The same for..
How to use UIPanGestureRecognizer to move object? iPhone/iPad http://stackoverflow.com/questions/6672677/how-to-use-uipangesturerecognizer-to-move-object-iphone-ipad I have read this and I am still not able to use it... On the nib file that I am working on I have a UIView white rectangle on image that I wish to drag with that class and in my .m file I have placed void setTranslation CGPoint translation inView..
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 atPoint CGPointMake 0 0 Change the origin of the text inside the image from 0 0 to whatever point you like. To paint a rectangle of solid color behind the text add the following before the line UIColor whiteColor set UIColor brownColor set CGContextFillRect..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d a rectangle image into a quadrilateral using a CATransform3D I have an image and a set of four points describing a quadrilateral Q..
How to mask a square image into an image with round corners in the iPhone SDK? http://stackoverflow.com/questions/996292/how-to-mask-a-square-image-into-an-image-with-round-corners-in-the-iphone-sdk round corners iphone graphics share improve this question You can use CoreGraphics to create a path for a round rectangle with this code snippet static void addRoundedRectToPath CGContextRef context CGRect rect float ovalWidth float ovalHeight.. fh 2 1 CGContextClosePath context CGContextRestoreGState context And then call CGContextClip context to clip it to the rectangle path. Now any drawing done including drawing an image will be clipped to the round rectangle shape. As an example assuming.. context to clip it to the rectangle path. Now any drawing done including drawing an image will be clipped to the round rectangle shape. As an example assuming image is a UIImage and this is in a drawRect method CGContextRef context UIGraphicsGetCurrentContext..
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