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2014/10/15 ¤U¤È 10:12:20
iphone Programming Glossary: offsetUIScrollView. Any thoughts on implementing “infinite” scroll/zoom? http://stackoverflow.com/questions/1493950/uiscrollview-any-thoughts-on-implementing-infinite-scroll-zoom some fixed size view handled by your scroll view and at launch or instantiation set the content offset so that you're seeing the middle of the handled view. Then just watch the content offset using KVO or.. content offset so that you're seeing the middle of the handled view. Then just watch the content offset using KVO or some other method and if you near any edge update the content of the view with a new set.. other method and if you near any edge update the content of the view with a new set of content offset appropriately and reset the scroll view's contentOffset property to be back in the middle. Handling..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio factor float newHeight value.bounds.size.height factor Then figure out if you need to offset it to center vertically or horizontally float leftOffset screenRect.size.width newWidth 2 float topOffset..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework point A will be containing n 2 complex numbers only the first one is actually two real numbers DC offset Nyquist # masquerading as a complex number. The documentation overview explains this packing. it is..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer CGPathGetPathBoundingBox visiblePath instead of bounds in the following line 42 cuould just be any offset 0 CGPathAddRect path NULL CGRectInset bounds 42 42 Add the visible path so that it gets subtracted for.. draw anything outside it to the screen. Then setup up the shadow on the context which includes the offset blur and color. Then fill the big shape with the hole in it. The color doesn't matter because if you've..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare There are a number of issues you have to address in a real world application. For example using offset instead of fixed ending points or defining measures of fit see this paper page 363 5. boundary conditions..
UIScrollView. Any thoughts on implementing “infinite” scroll/zoom? http://stackoverflow.com/questions/1493950/uiscrollview-any-thoughts-on-implementing-infinite-scroll-zoom to emulate that behavior. Handling the fixed contentSize have some fixed size view handled by your scroll view and at launch or instantiation set the content offset so that you're seeing the middle of the handled view. Then just watch the content offset using KVO or some other method and if you near any edge update the content.. by your scroll view and at launch or instantiation set the content offset so that you're seeing the middle of the handled view. Then just watch the content offset using KVO or some other method and if you near any edge update the content of the view with a new set of content offset appropriately and reset the scroll view's.. view. Then just watch the content offset using KVO or some other method and if you near any edge update the content of the view with a new set of content offset appropriately and reset the scroll view's contentOffset property to be back in the middle. Handling zooming do something similar only this time watch the zoom factor..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio or horizontal shrinkage factor float newWidth value.bounds.size.width factor float newHeight value.bounds.size.height factor Then figure out if you need to offset it to center vertically or horizontally float leftOffset screenRect.size.width newWidth 2 float topOffset screenRect.size.height newHeight 2 CGRect newRect CGRectMake..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework vDSP_fft_zrip setupReal A stride log2n FFT_FORWARD At this point A will be containing n 2 complex numbers only the first one is actually two real numbers DC offset Nyquist # masquerading as a complex number. The documentation overview explains this packing. it is quite neat basically it allows the complex results of the transform..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer the shadow for a path whichs bounding box is not known pass CGPathGetPathBoundingBox visiblePath instead of bounds in the following line 42 cuould just be any offset 0 CGPathAddRect path NULL CGRectInset bounds 42 42 Add the visible path so that it gets subtracted for the shadow CGPathAddPath path NULL visiblePath CGPathCloseSubpath.. path as the clipping path on the context so that you don't draw anything outside it to the screen. Then setup up the shadow on the context which includes the offset blur and color. Then fill the big shape with the hole in it. The color doesn't matter because if you've done everything right you won't see this color just the..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare warping path is marked gray. This is only a sketch of DTW. There are a number of issues you have to address in a real world application. For example using offset instead of fixed ending points or defining measures of fit see this paper page 363 5. boundary conditions and page 364. The above linked paper has further details..
Drop Shadow on UITextField text http://stackoverflow.com/questions/1274168/drop-shadow-on-uitextfield-text do with UILabel . Two ideas 1 Moderately tricky to code. Add a second UITextField behind the original at a very small offset maybe by 0.2 0.8 . You can listen to every text change key by key by implementing the textField shouldChangeCharactersInRange.. You could also make the lower text the shadow text gray and even slightly blurry using the fact that fractionally offset text rects appear blurry. Added Oh yea don't forget to set the top text field's background color to UIColor clearColor if..
UIScrollView. Any thoughts on implementing “infinite” scroll/zoom? http://stackoverflow.com/questions/1493950/uiscrollview-any-thoughts-on-implementing-infinite-scroll-zoom fixed contentSize have some fixed size view handled by your scroll view and at launch or instantiation set the content offset so that you're seeing the middle of the handled view. Then just watch the content offset using KVO or some other method.. instantiation set the content offset so that you're seeing the middle of the handled view. Then just watch the content offset using KVO or some other method and if you near any edge update the content of the view with a new set of content offset.. using KVO or some other method and if you near any edge update the content of the view with a new set of content offset appropriately and reset the scroll view's contentOffset property to be back in the middle. Handling zooming do something..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio newWidth value.bounds.size.width factor float newHeight value.bounds.size.height factor Then figure out if you need to offset it to center vertically or horizontally float leftOffset screenRect.size.width newWidth 2 float topOffset screenRect.size.height..
Finding the direction of scrolling in a UIScrollView? http://stackoverflow.com/questions/2543670/finding-the-direction-of-scrolling-in-a-uiscrollview delegate. In this sample I created a variable named lastContentOffset which I use to compare the current content offset with the previous one. If it's greater then the scrollView is scrolling right. If it's less then the scrollView is scrolling..
Can I select a specific block of text in a UITextField? http://stackoverflow.com/questions/3277538/can-i-select-a-specific-block-of-text-in-a-uitextfield the new position for left and for right UITextPosition newPosition textField positionFromPosition selectedRange.start offset 5 Construct a new range using the object that adopts the UITextInput our textfield UITextRange newRange textField textRangeFromPosition..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework FFT_FORWARD At this point A will be containing n 2 complex numbers only the first one is actually two real numbers DC offset Nyquist # masquerading as a complex number. The documentation overview explains this packing. it is quite neat basically..
UIScrollView Infinite Scrolling http://stackoverflow.com/questions/3430267/uiscrollview-infinite-scrolling meantime. I would subclass UIScrollView and put the magic in the setContentOffset method. In my experience all content offset changing passes through that method even the content offset changing induced by the internal scrolling. Just do super setContentOffset.. the setContentOffset method. In my experience all content offset changing passes through that method even the content offset changing induced by the internal scrolling. Just do super setContentOffset .. at some point to pass the message on to the..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer is not known pass CGPathGetPathBoundingBox visiblePath instead of bounds in the following line 42 cuould just be any offset 0 CGPathAddRect path NULL CGRectInset bounds 42 42 Add the visible path so that it gets subtracted for the shadow CGPathAddPath.. so that you don't draw anything outside it to the screen. Then setup up the shadow on the context which includes the offset blur and color. Then fill the big shape with the hole in it. The color doesn't matter because if you've done everything..
NSDate is not returning my local Time zone /default time zone of device http://stackoverflow.com/questions/4547379/nsdate-is-not-returning-my-local-time-zone-default-time-zone-of-device is @ lo GMT 5 2010 12 28 20 56 11.785 Done 484 307 current local timezone is Local Time Zone Asia Karachi GMT 05 00 offset 18000 NSTimeZone df NSTimeZone defaultTimeZone NSLog @ current default timezone is @ df GMT 5 2010 12 28 20 56 11.790 Done.. default timezone is @ df GMT 5 2010 12 28 20 56 11.790 Done 484 307 current default timezone is Asia Karachi GMT 05 00 offset 18000 but NSDate cDate NSDate date NSLog @ current date by NSDate @ cDate but NSDate show GMT 2010 12 28 20 56 11.794 Done..
UITextView ruled line background but wrong line height http://stackoverflow.com/questions/5375350/uitextview-ruled-line-background-but-wrong-line-height of the view NSUInteger numberOfLines self.contentSize.height self.bounds.size.height self.font.leading Set the line offset from the baseline. I'm sure there's a concrete way to calculate this. CGFloat baselineOffset 6.0f iterate over numberOfLines.. this. CGFloat baselineOffset 6.0f iterate over numberOfLines and draw each line for int x 0 x numberOfLines x 0.5f offset lines up line with pixel boundary CGContextMoveToPoint context self.bounds.origin.x self.font.leading x 0.5f baselineOffset..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare only a sketch of DTW. There are a number of issues you have to address in a real world application. For example using offset instead of fixed ending points or defining measures of fit see this paper page 363 5. boundary conditions and page 364...
UIScrollView image/photo viewer with paging enabled and zooming http://stackoverflow.com/questions/975708/uiscrollview-image-photo-viewer-with-paging-enabled-and-zooming nasty movement of the view you are resizing which looks like it's caused by the fact we are changing the contentsize offset etc. for the view being resized. You have to do this view moving otherwise you can pan left through the whitespace left.. of sounds like what is happening here. After zooming in the view will shift offscreen because you have changed the offset etc. I've spent hours on this already and I'm slowing coming to the sad realization that this just isn't going to work...
UITableView: scrolling programmatically the content view http://stackoverflow.com/questions/3457900/uitableview-scrolling-programmatically-the-content-view newRect.origin.y newRect.size.height newRect.size.width self scrollRectToVisible newRect animated YES NSLog @ Content OFFSET f tPoint.y previousYPan self setContentOffset CGPointMake rc.origin.x tPoint.y previousYPan 2.0 animated YES previousYPan.. minY contentOffSetY maxY contentOffSetY minY 5 totalOS 0 contentOffSetY maxY 5 totalOS 0 if totalOS 0 totalOS OFFSET else if totalOS 0 totalOS OFFSET self setContentOffset CGPointMake rc.origin.x self.contentOffset.y totalOS animated NO.. contentOffSetY minY 5 totalOS 0 contentOffSetY maxY 5 totalOS 0 if totalOS 0 totalOS OFFSET else if totalOS 0 totalOS OFFSET self setContentOffset CGPointMake rc.origin.x self.contentOffset.y totalOS animated NO else if contentOffSetY minY 5 totalOS..
iphone Convert NSDate from server to local device time and compare http://stackoverflow.com/questions/9238420/iphone-convert-nsdate-from-server-to-local-device-time-and-compare sourceDate NSInteger destinationGMTOffset destinationTimeZone secondsFromGMTForDate sourceDate NSLog @ Source OFFSET i sourceGMTOffset NSLog @ Desti OFFSET i destinationGMTOffset NSTimeInterval interval destinationGMTOffset sourceGMTOffset.. destinationTimeZone secondsFromGMTForDate sourceDate NSLog @ Source OFFSET i sourceGMTOffset NSLog @ Desti OFFSET i destinationGMTOffset NSTimeInterval interval destinationGMTOffset sourceGMTOffset NSDate destinationDate NSDate alloc..
Rejected iPhone application by Apple developers due to “do not back up” reason. What do I do now? http://stackoverflow.com/questions/9547027/rejected-iphone-application-by-apple-developers-due-to-do-not-back-up-reason
http://stackoverflow.com/questions/10669222/take-screenshot-of-the-window .x window center .y Apply the window's transform about the anchor point CGContextConcatCTM context window transform Offset by the portion of the bounds left of and above the anchor point CGContextTranslateCTM context window bounds .size.width..
memory leak when using CGImageCreateWithJPEGDataProvider http://stackoverflow.com/questions/12211158/memory-leak-when-using-cgimagecreatewithjpegdataprovider memory leak. But i don't know why. The leak method in Class A is as follows ResultHolder decodeData UInt8 data withOffset int offset const int length IOUtilities byteArrayToIntWithData data Offset offset 18 UInt8 buffer malloc length sizeof UInt8.. ResultHolder decodeData UInt8 data withOffset int offset const int length IOUtilities byteArrayToIntWithData data Offset offset 18 UInt8 buffer malloc length sizeof UInt8 memcpy buffer data offset 22 length sometimes memory leak in this line..
http://stackoverflow.com/questions/2247647/offset-on-uiwindow-addsubview on UIWindow addSubview I've got a UITabBar based application that works just fine. Under certain circumstances I am showing..
iPhone UITableViewCell layer shadow http://stackoverflow.com/questions/3546880/iphone-uitableviewcell-layer-shadow UITableViewCell layer shadow I'm trying to add a shadow to a UITableViewCell using the layer.shadowColor Offset Radius but it doesn't seem to affect it in any way. The table is grouped style. Any ideas why Here is the code i'm using.. is the code i'm using cell.layer.shadowColor UIColor blackColor .CGColor cell.layer.shadowRadius 5.0 cell.layer.shadowOffset CGSizeMake 10 10 iphone cocoa touch uitableviewcell shadow share improve this question You need to also set the shadow.. opacity it defaults to 0 and you won't see anything if you don't explicitly set it. CALayer Reference cell.layer.shadowOffset CGSizeMake 1 0 cell.layer.shadowColor UIColor blackColor CGColor cell.layer.shadowRadius 5 cell.layer.shadowOpacity .25..
iPhone - flattening a UIImageView and subviews to image = blank image http://stackoverflow.com/questions/3869692/iphone-flattening-a-uiimageview-and-subviews-to-image-blank-image center .x view center .y Apply the view's transform about the anchor point CGContextConcatCTM context view transform Offset by the portion of the bounds left of and above the anchor point CGContextTranslateCTM context view bounds .size.width view..
Problem with UIScrollView Content Offset http://stackoverflow.com/questions/4655570/problem-with-uiscrollview-content-offset with UIScrollView Content Offset Im developing an iPad app in which I have a scrollview the size of which i determine dynamically depending on the number.. the view loads. When I check the value of the offset it shows 0. I dont understand why without having a contentOffset value the scrollview behaves that way. Any reasons for this I suspect this has something to do with iOS 4.2 as i dont remember.. the value of the height of the scrollView frame the offset also increases proportionally. However scrollView.contentOffset.y still 0.0 iphone ipad uiscrollview share improve this question if u use interface builder add scrollview to the view..
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