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2014/10/15 ¤U¤È 10:09:02
iphone Programming Glossary: filteringUITableView: deleting sections with animation http://stackoverflow.com/questions/1061071/uitableview-deleting-sections-with-animation tableHeaders release tableHeaders newHeaders storing filtered table groups self.filteredTableGroups newTableGroups filtering animation and presentation model update self.tableView beginUpdates tableGroups self.filteredTableGroups self.tableView..
Drag UIView around Shape Comprised of CGMutablePaths http://stackoverflow.com/questions/13664615/drag-uiview-around-shape-comprised-of-cgmutablepaths that when Core Graphics dashes the path it can create segments that slightly overlap. We'll want to eliminate those by filtering out each point that's too close to its predecessor so we'll define a minimum inter point distance static CGFloat const kMinimumDistance.. to its predecessor so we'll define a minimum inter point distance static CGFloat const kMinimumDistance 0.1f To do the filtering we'll need to keep track of that predecessor __block CGPoint priorPoint HUGE_VALF HUGE_VALF We need to create the NSMutableData..
Ignore certain exceptions when using Xcode's All Exceptions breakpoint http://stackoverflow.com/questions/14370632/ignore-certain-exceptions-when-using-xcodes-all-exceptions-breakpoint to ignore these so I can get back to debugging my own code Moderators this is similar to Xcode 4 exception breakpoint filtering but I think that question takes too long to get around to the point and doesn't have any useful answers. Can they be linked..
http://stackoverflow.com/questions/1598407/iphone-and-wireshark the Windows computer as your access point. Then just run Wireshark as normal and intercept the packets flowing through filtering by their startpoints. Alternatively try using a network hub as Wireshark can trace all packets flowing through a network..
Measuring velocity via iPhone SDK http://stackoverflow.com/questions/1994018/measuring-velocity-via-iphone-sdk the iPhone accelerometer data can be noisy . I'm familiar with the SDK example that demonstrates using low high pass filtering etc. but I have not seen a good example anywhere that shows calculating velocity. Does anyone have any real world experience..
Tab Bar Application With Navigation Controller http://stackoverflow.com/questions/369128/tab-bar-application-with-navigation-controller a a seperate nib with a corresponding controller. Each nib contains a tableview with some other controls for searching filtering etc. What I would like and cant seem to find an example of is adding a navigation controller to the app so each nib i.e...
UISearchDisplayContoller ??can't prevent table reload on typing in search bar http://stackoverflow.com/questions/3903718/uisearchdisplaycontoller-cant-prevent-table-reload-on-typing-in-search-bar results are loading in the background. What I did is if there are current search results show results even if loading filtering in the background if there are no search results and isLoading NO return 1 row and show 'No matches' in a cell if there..
Getting displacement from accelerometer data with Core Motion http://stackoverflow.com/questions/4449565/getting-displacement-from-accelerometer-data-with-core-motion higher degree Newton Cotes formula. If you managed this you will have to keep an eye on setting up the right low pass filtering. I cannot give a general value but as a rule of thumb experimenting with filtering factors between 0.2 and 0.8 will be a.. on setting up the right low pass filtering. I cannot give a general value but as a rule of thumb experimenting with filtering factors between 0.2 and 0.8 will be a good starting point. The right value depends on the business case you need for instance..
How to apply “filters” to AVCaptureVideoPreviewLayer http://stackoverflow.com/questions/5156872/how-to-apply-filters-to-avcapturevideopreviewlayer share improve this question Probably the most performant way of handling this would be to use OpenGL ES for filtering and display of these video frames. You won't be able to do much with an AVCaptureVideoPreviewLayer directly aside from adjusting.. to process the video in realtime for display. In this application explained in detail here I was using color based filtering to track objects in the camera view but others have modified this code to do some neat video processing effects. All GPU.. on the above I've now created an open source framework called GPUImage that encapsulates this kind of custom image filtering. It also handles capturing video and displaying it to the screen after being filtered requiring as few as six lines of code..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space 8 4 8 5 8 6 8 7 8 8 8 The digits denote the texture's pixels the bars the edges of the texture and in case of nearest filtering the border between pixels. You however want to hit the pixels' centers. So you're interested in the texture coordinates..
Are the Core Image filters in iOS 5.0 fast enough for realtime video processing? http://stackoverflow.com/questions/6625888/are-the-core-image-filters-in-ios-5-0-fast-enough-for-realtime-video-processing iPhone's camera rate on the iPhone 4 running iOS 5 but as of iOS 6 it processes video more than fast enough to do live filtering on iPhone 4S and above. The source for these benchmarks can be found in my GitHub repository if you wish to see where I..
UIScrollView : paging horizontally, scrolling vertically? http://stackoverflow.com/questions/728014/uiscrollview-paging-horizontally-scrolling-vertically to NO should make nested UIScrollViews to work. Unfortunately it does not UIScrollView appears to do some additional filtering for fast motions which cannot be disabled so that even if UIScrollView can only be scrolled horizontally it will always..
Where are an UIWebView's cookies stored? http://stackoverflow.com/questions/771498/where-are-an-uiwebviews-cookies-stored sharedHTTPCookieStorage for cookie in cookieJar cookies NSLog @ @ cookie Several methods are available for filtering and manipulation. Take a look at the NSHTTPCookieStorage documentation for accessing cookies and the NSHTTPCookie documentation..
Scrolling with two fingers with a UIScrollView http://stackoverflow.com/questions/787212/scrolling-with-two-fingers-with-a-uiscrollview because UIScrollView cannot be scrolled with two fingers . Try passing only the data for one finger to super by filtering the NSSet touches argument note that it only contains the changed touches and ignoring events for the wrong finger altogether..
How can you apply distortions to a UIImage using OpenGL ES? http://stackoverflow.com/questions/9886843/how-can-you-apply-distortions-to-a-uiimage-using-opengl-es filter pipeline if you'd like to perform more advanced chained effects or you can use a different input source for filtering live camera video or movies. The source code for this project is available at the above link under a BSD license so you..
Filtering characters entered into a UITextField http://stackoverflow.com/questions/1013647/filtering-characters-entered-into-a-uitextfield characters entered into a UITextField I have a UITextField in my application. I'd like to restrict the set of characters..
Filtering UITableViewCells with animation - iPhone Development http://stackoverflow.com/questions/3628395/filtering-uitableviewcells-with-animation-iphone-development UITableViewCells with animation iPhone Development This seems simple enough but as yet I am unable to find a solution...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll sectionInfo numberOfObjects return numberOfRows Delegate methods for the search bar #pragma mark #pragma mark Content Filtering void filterContentForSearchText NSString searchText scope NSInteger scope update the filter in this case just blow away..
Accelerometer Low Pass Filtering http://stackoverflow.com/questions/6942626/accelerometer-low-pass-filtering Low Pass Filtering Still on the BigNerdRanch iOS Development book. In the Accelerometer chapter they first implement accelerometer tracking.. through the documentation and I found something about low pass filters which suggests the following code #define kFilteringFactor 0.1 void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration Use a basic low pass.. acceleration Use a basic low pass filter to keep only the gravity component of each axis. accelX acceleration.x kFilteringFactor accelX 1.0 kFilteringFactor accelY acceleration.y kFilteringFactor accelY 1.0 kFilteringFactor accelZ acceleration.z..
filtering content for UITableView http://stackoverflow.com/questions/8452737/filtering-content-for-uitableview predicate NSPredicate predicateWithFormat @ length 9 NSArray myArray2 myArray filteredArrayUsingPredicate predicate Filtering is not always done with arrays. It can be done with NSFetchedResultsControllers if using Core Data. Predicates are used..
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