2014/10/15 下午 10:12:51
iphone Programming Glossary: precisehttp://stackoverflow.com/questions/1118626/how-to-add-marquee-to-a-label off screen and a new label moving on screen. You'll have to play around with the animationDuration property and the precise positioning and sizing properties of the labels and views to get it just right but it should be quite simple. share improve..
When does a touchesBegan become a touchesMoved? http://stackoverflow.com/questions/1122616/when-does-a-touchesbegan-become-a-touchesmoved fingers which puts the first touch at a distinct disadvantage. It's very asymmetric and bad news for apps that demand precise input like games and musical instruments. To see this bug phenomenon in action slowly drag the iPhone screen unlock slider..
Understanding iOS 6 Interface orientation change http://stackoverflow.com/questions/12778636/understanding-ios-6-interface-orientation-change is no presentation involved here. Presented and presentation are not some vague terms meaning appears . These are precise technical terms meaning that this view controller is brought into play with the call presentViewController animated completion..
Are C/C++/ObjC/JS Apple's only allowed langauges for iPhone development? http://stackoverflow.com/questions/2603279/are-c-c-objc-js-apples-only-allowed-langauges-for-iphone-development a ban on interpreted languages on the iPhone for a while now but yes I suppose this makes the ban more clear and more precise. I imagine that yes Apple is saying that if you use a language other than C C Objective C or JavaScript you run the risk..
http://stackoverflow.com/questions/3195240/iphone-icon-size as it was shown pixelated in the iPhone 4 simulator so I have used a new image with higher resolution 300 x 300 to be precise. On the simulator its showing fine for both iPhone 4 and the iPhone device simulators. However when I ported my app to an..
Detect retina screen/iPhone 4 in iPhone SDK http://stackoverflow.com/questions/3272752/detect-retina-screen-iphone-4-in-iphone-sdk retina screen iPhone 4 in iPhone SDK In my application I am downloading some images from the web from my server to be precise in order to save some bandwith and especially memory on the phone I provide them in two resolutions 480x320 for the old..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework be a very great pitch detector as it doesn't have nearly fine enough granularity. There is a cunning trick Extracting precise frequencies from FFT Bins using phase change between frames to get the precise frequency for a given bin. Ok Now onto the.. There is a cunning trick Extracting precise frequencies from FFT Bins using phase change between frames to get the precise frequency for a given bin. Ok Now onto the code Note the 'ip' in vDSP_fft_zrip ' in place ' ie output overwrites A 'r' means..
Calling C++ method from Objective C http://stackoverflow.com/questions/4456239/calling-c-method-from-objective-c in test_viewcontroller.o collect2 ld returned 1 exit status Can anyone please point me as to what is wrong Let me be precise #ifdef __cplusplus extern C char UTMLetterDesignator double Lat NSString LLtoUTM double Lat double Long double UTMNorthing..
iPhone GPS Development - Tips + Tricks [closed] http://stackoverflow.com/questions/488088/iphone-gps-development-tips-tricks will attempt to triangulate based on cell phone towers and Core Location will return the result. It'll be much less precise than GPS. Core Location will cache data. The first reading it provides to your app is likely to be an old reading which..
Detect horizontal panning in UITableView http://stackoverflow.com/questions/5426306/detect-horizontal-panning-in-uitableview in UITableView I'm using a UIPanGestureRecognizer to recognize horizontal sliding in a UITableView on a cell to be precise though it is added to the table itself . However this gesture recognizer obviously steals the touches from the table. I..
iOS: Movement Precision in 3D Space http://stackoverflow.com/questions/5550453/ios-movement-precision-in-3d-space Movement Precision in 3D Space From what I understand GPS has limited accuracy. Is it possible to get a more precise location for a person in 3D space I'm planning to write an application where users will move with their phones in any direction..
iOS - How to limit the MapView to a specific region? http://stackoverflow.com/questions/5680896/ios-how-to-limit-the-mapview-to-a-specific-region to your specific one. Look at that answer to have an example of how to do this. Another solution that brings more precise events but is more complex I'm currently using this successfully for another need is to subclass MKMapView and override..
problem with collision of two images http://stackoverflow.com/questions/5926355/problem-with-collision-of-two-images I started that app I didn't even know how to write a decent game loop. You will need that first because you need to do precise time step calculations. AFA the collisions you update your model and view separately so if you update the model and objects..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c with respondsToSelector before calling a particular method on it. Apple recommends this method because it is more precise doesn't mess with NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate..
Why timer stops when scrolling in UIWebView iPhone? [duplicate] http://stackoverflow.com/questions/6684016/why-timer-stops-when-scrolling-in-uiwebview-iphone it will execute in all run loop modes that have been declared as a member of the set of 𦣇ommon modes to be precise . That means that the timer is not only working in NSDefaultRunLoopMode but also in NSEventTrackingRunLoopMode when the..
GPS coordinates in degrees to calculate distances http://stackoverflow.com/questions/6994101/gps-coordinates-in-degrees-to-calculate-distances gps share improve this question Why don't you use CLLocation s distanceFromLocation method It will tell you the precise distance between the receiver and another CLLocation. CLLocation locationA CLLocation alloc initWithLatitude 12.123456 longitude..
Create custom keyboard and configure it on your iPhone http://stackoverflow.com/questions/7189287/create-custom-keyboard-and-configure-it-on-your-iphone they do will see the smiley even if they don't have installed any Emoji enabler app like Emoji free . To be more precise the emoji icons that Apple embedded in the iPhone fonts are not approved by the Unicode Standard. They are located in the..
How can I get a precise time, for example in milliseconds in Objective-C? http://stackoverflow.com/questions/889380/how-can-i-get-a-precise-time-for-example-in-milliseconds-in-objective-c can I get a precise time for example in milliseconds in Objective C Is there an easy way to get a time very precisely I need to calculate some.. can I get a precise time for example in milliseconds in Objective C Is there an easy way to get a time very precisely I need to calculate some delays between method calls. More specifically I want to calculate the speed of scrolling in..
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