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2014/10/15 ¤U¤È 10:13:59

iphone Programming Glossary: setneedsdisplay

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

but it is not being tinted. I also tried loading other images setting the image in IB and calling setNeedsDisplay in my view controller. Update drawRect is not being called. Final update I found an old project that.. UIColor newColor if overlayColor overlayColor release overlayColor newColor retain self setNeedsDisplay fires off drawRect each time color changes In the drawRect method you'll want to draw the image first..

How can i change the color of pagination dots of UIPageControl?

http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol

_currentPage void setCurrentPage NSInteger page _currentPage MIN MAX 0 page _numberOfPages 1 self setNeedsDisplay NSInteger numberOfPages return _numberOfPages void setNumberOfPages NSInteger pages _numberOfPages MAX.. pages _numberOfPages MAX 0 pages _currentPage MIN MAX 0 _currentPage _numberOfPages 1 self setNeedsDisplay id initWithFrame CGRect frame if self super initWithFrame frame Default colors. self.backgroundColor..

Is there a way to make drawRect work right NOW?

http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now

ipop you will know that of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating.. 2 which incrementally 3 creates a more and more complicated artwork and 4 at each step you setNeedsDisplay wrong 5 until all the work is done 6 Of course when you do that all that happens is that drawRect is.. stepwiseDrawingV2.zip.html You will see it tests all five methods #ifdef TOMSWIFTMETHOD self setNeedsDisplay NSRunLoop currentRunLoop runMode NSDefaultRunLoopMode beforeDate NSDate date #endif #ifdef HOTPAW self..

How do I manage building a Lite vs Paid version of an iPhone app?

http://stackoverflow.com/questions/549462/how-do-i-manage-building-a-lite-vs-paid-version-of-an-iphone-app

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

UIColor blueColor super viewDidLoad I see the image but it is not being tinted. I also tried loading other images setting the image in IB and calling setNeedsDisplay in my view controller. Update drawRect is not being called. Final update I found an old project that had an imageView set up properly so I could test Ramin's code.. when the color changes. Something like this void setOverlayColor UIColor newColor if overlayColor overlayColor release overlayColor newColor 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..

How can i change the color of pagination dots of UIPageControl?

http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol

@synthesize delegate NSInteger currentPage return _currentPage void setCurrentPage NSInteger page _currentPage MIN MAX 0 page _numberOfPages 1 self setNeedsDisplay NSInteger numberOfPages return _numberOfPages void setNumberOfPages NSInteger pages _numberOfPages MAX 0 pages _currentPage MIN MAX 0 _currentPage _numberOfPages.. numberOfPages return _numberOfPages void setNumberOfPages NSInteger pages _numberOfPages MAX 0 pages _currentPage MIN MAX 0 _currentPage _numberOfPages 1 self setNeedsDisplay id initWithFrame CGRect frame if self super initWithFrame frame Default colors. self.backgroundColor UIColor clearColor self.dotColorCurrentPage UIColor blackColor..

Is there a way to make drawRect work right NOW?

http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now

If you are an advanced user of drawRect on your ipop you will know that of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating in the common situation where you want to have a view.. where you want to have a view controller 1 starts some function 2 which incrementally 3 creates a more and more complicated artwork and 4 at each step you setNeedsDisplay wrong 5 until all the work is done 6 Of course when you do that all that happens is that drawRect is run once only after step 6. What you want is for the ^ £@ @.. Here is V2 of the demo app... http www.fileswap.com dl p8lU3gAi stepwiseDrawingV2.zip.html You will see it tests all five methods #ifdef TOMSWIFTMETHOD self setNeedsDisplay NSRunLoop currentRunLoop runMode NSDefaultRunLoopMode beforeDate NSDate date #endif #ifdef HOTPAW self setNeedsDisplay CATransaction flush #endif #ifdef LLOYDMETHOD..

How do I manage building a Lite vs Paid version of an iPhone app?

http://stackoverflow.com/questions/549462/how-do-i-manage-building-a-lite-vs-paid-version-of-an-iphone-app

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

I see the image but it is not being tinted. I also tried loading other images setting the image in IB and calling setNeedsDisplay in my view controller. Update drawRect is not being called. Final update I found an old project that had an imageView set.. like this void setOverlayColor UIColor newColor if overlayColor overlayColor release overlayColor newColor 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..

How can I change the saturation of an UIImage?

http://stackoverflow.com/questions/1144768/how-can-i-change-the-saturation-of-an-uiimage

DesatView.h @implementation DesatView @synthesize image desaturation void setSaturation float sat saturation sat self setNeedsDisplay id initWithFrame CGRect frame if self super initWithFrame frame self.backgroundColor UIColor clearColor else background..

Drawing incrementally in a UIView (iPhone)

http://stackoverflow.com/questions/1798414/drawing-incrementally-in-a-uiview-iphone

point if myPoints count kMaxPoints Drop drop Drop alloc init autorelease drop.point point myPoints addObject drop self setNeedsDisplayInRect CGRectMake drop.point.x drop.dropSize 2 drop.point.y drop.dropSize 2 drop.dropSize drop.dropSize redraw void drawRect.. the content of the UIView every single time you can mark only the areas of the view that need redrawing using UIView setNeedsDisplayInRect instead of UIView setNeedsDisplay . You also need to make sure that the graphics content is not cleared before drawing.. time you can mark only the areas of the view that need redrawing using UIView setNeedsDisplayInRect instead of UIView setNeedsDisplay . You also need to make sure that the graphics content is not cleared before drawing by setting view.clearsContextBeforeDrawing..

How can i change the color of pagination dots of UIPageControl?

http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol

currentPage return _currentPage void setCurrentPage NSInteger page _currentPage MIN MAX 0 page _numberOfPages 1 self setNeedsDisplay NSInteger numberOfPages return _numberOfPages void setNumberOfPages NSInteger pages _numberOfPages MAX 0 pages _currentPage.. setNumberOfPages NSInteger pages _numberOfPages MAX 0 pages _currentPage MIN MAX 0 _currentPage _numberOfPages 1 self setNeedsDisplay id initWithFrame CGRect frame if self super initWithFrame frame Default colors. self.backgroundColor UIColor clearColor..

How To Draw line on touch event?

http://stackoverflow.com/questions/4669490/how-to-draw-line-on-touch-event

void touchesMoved NSSet touches withEvent UIEvent event self.currentPath addLineToPoint touch locationInView self self setNeedsDisplay void drawRect CGRect rect UIColor redColor set for UIBezierPath path in paths path stroke Note that this is simplified a..

Drawing bezier curves with my finger in iOS?

http://stackoverflow.com/questions/4672646/drawing-bezier-curves-with-my-finger-in-ios

setCurvePath UIBezierPath newPath id tmp curvePath curvePath newPath retain tmp release state BezierStateNone self setNeedsDisplay void _updateCurve UIBezierPath path UIBezierPath bezierPath path moveToPoint startPt path addCurveToPoint endPt controlPoint1..

Is there a way to make drawRect work right NOW?

http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now

of drawRect on your ipop you will know that of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating in the common.. 1 starts some function 2 which incrementally 3 creates a more and more complicated artwork and 4 at each step you setNeedsDisplay wrong 5 until all the work is done 6 Of course when you do that all that happens is that drawRect is run once only after.. dl p8lU3gAi stepwiseDrawingV2.zip.html You will see it tests all five methods #ifdef TOMSWIFTMETHOD self setNeedsDisplay NSRunLoop currentRunLoop runMode NSDefaultRunLoopMode beforeDate NSDate date #endif #ifdef HOTPAW self setNeedsDisplay CATransaction..

UITextView ruled line background but wrong line height

http://stackoverflow.com/questions/5375350/uitextview-ruled-line-background-but-wrong-line-height

is the ... line. nThis is the ... line. nThis is the ... line. n void scrollViewDidScroll UIScrollView scrollView note setNeedsDisplay void textViewDidBeginEditing UITextView textView CGRect frame self.view.bounds frame.size.height KEYBOARD_HEIGHT note.frame..

Can you use cancel/isCancelled with GCD/dispatch_async?

http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async

you get here when the process finishes whether by completion or if we have asked it to cancel itself. self typically setNeedsDisplay etc YourUIStateMachine nothinghappening these are the background routines... the kickoff the wrapper and the guts The wrapper..

How do I manage building a Lite vs Paid version of an iPhone app?

http://stackoverflow.com/questions/549462/how-do-i-manage-building-a-lite-vs-paid-version-of-an-iphone-app

Most efficient way to draw part of an image in iOS

http://stackoverflow.com/questions/8035673/most-efficient-way-to-draw-part-of-an-image-in-ios

rect imageRef CGImageRelease imageRef Unfortunately this seems extremely slow with medium sized images and a high setNeedsDisplay frequency. Playing with UIImageView 's frame and clipToBounds produces better results with less flexibility . iphone ios.. your goal if your goal is just clipping a rectangular region of an image not too big . Also you don't need to send setNeedsDisplay message. Or you can try putting the UIImageView inside of an empty UIView and set clipping at the container view. With this..