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2014/10/15 ¤U¤È 10:12:48
iphone Programming Glossary: pointingWhat do I have to do to get Core Data to automatically migrate models? http://stackoverflow.com/questions/1018155/what-do-i-have-to-do-to-get-core-data-to-automatically-migrate-models in between files and just deploy with the oldest and latest models. UPDATE 15 07 2011 Thanks to @ rockstarberlin for pointing out there is updated documentation at apple Xcode 4 Setting a Managed Object Model ™s Current Version Update 8 19 2013 better..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage iphone uikit core graphics quartz graphics share improve this question Yes CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace..
HTTP Live Streaming, FFMPEG & FFSERVER, and iPhone OS 3 http://stackoverflow.com/questions/1093667/http-live-streaming-ffmpeg-ffserver-and-iphone-os-3 an H.264 video with MP3 audio into Apple's segmenter. The segmenter spits out segmented video files and M3U playlists pointing to the segmented files. You'd serve the segmented files and playlists via a web server like Apache. Obviously you'll want..
get NSDate today, yesterday, this Week, last Week, this Month, last Month… variables http://stackoverflow.com/questions/1889164/get-nsdate-today-yesterday-this-week-last-week-this-month-last-month-var NSDate today cal dateByAddingComponents components toDate NSDate alloc init options 0 This variable should now be pointing at a date object that is the start of today midnight components setHour 24 components setMinute 0 components setSecond 0..
How can I change the animation style of a modal UIViewController? http://stackoverflow.com/questions/237310/how-can-i-change-the-animation-style-of-a-modal-uiviewcontroller
How to implement didReceiveMemoryWarning? http://stackoverflow.com/questions/2430728/how-to-implement-didreceivememorywarning use of @synthesize . This can be a better approach than using the release method because this prevents a variable from pointing to random remnant data. Note in contrast that setting a variable directly using and not using the setter would result in..
UITableView issue when using separate delegate/dataSource http://stackoverflow.com/questions/254354/uitableview-issue-when-using-separate-delegate-datasource iPhone Developer Forums I've documented a solution The main UIViewController subclass of the project needs an outlet pointing to the UITableViewController instance. To accomplish this simply add the following to the primary view's header TableTestViewController.h..
Compensating compass lag with the gyroscope on iPhone 4 http://stackoverflow.com/questions/4212988/compensating-compass-lag-with-the-gyroscope-on-iphone-4 CMAttitude object's yaw property I don't need pitch nor roll for my purposes yaw ranges from 0 to PI when the phone is pointing downwards as indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when swung clockwise when the.. indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when swung clockwise when the device is pointing upwards yaw ranges from PI to 0 and PI to 0 respectively and from the compass data I'm using locationManager.heading.magneticHeading.. all of this information together I'm able to get a value I call horizontal that regardless of whether the device is pointing up or down will give values from 0 to 360 and increase when the device is swung clockwise though I am still having trouble..
How to draw a “speech bubble” on an iPhone? http://stackoverflow.com/questions/4442126/how-to-draw-a-speech-bubble-on-an-iphone c uiview share improve this question I've actually drawn this exact shape before rounded rectangle with a pointing triangle at the bottom . The Quartz drawing code that I used is as follows CGRect currentFrame self.bounds CGContextSetLineJoin..
Save Youtube video to iPhone in the app http://stackoverflow.com/questions/5087249/save-youtube-video-to-iphone-in-the-app
iOS WebView remote html with local image files http://stackoverflow.com/questions/5572258/ios-webview-remote-html-with-local-image-files iOS version please have a look at the answer from sjs. When I answered the question it was working though. He's pointing out some helpful additions and corrected some issues so give props to him as well. This is how it looks in my simulator..
Retain Cycles: Why is that such a bad thing? http://stackoverflow.com/questions/791322/retain-cycles-why-is-that-such-a-bad-thing counted'. In a language or system that uses reference counting an object keeps track of the number of references pointing at it. Every time a reference is deleted the count goes down when the count gets to zero there are no references and so..
Is there any way to determine if the iphone is roaming? http://stackoverflow.com/questions/900547/is-there-any-way-to-determine-if-the-iphone-is-roaming NSString operatorPListSymLinkPath @ var mobile Library Preferences com.apple.operator.plist when these links are pointing at the same file the telephone is not roaming. When pointing at different files the telephone is romaing. Simplified code.. Preferences com.apple.operator.plist when these links are pointing at the same file the telephone is not roaming. When pointing at different files the telephone is romaing. Simplified code no error checking etc BOOL isRoaming NSFileManager fm NSFileManager..
Simple gun in cocos2d+box2d game http://stackoverflow.com/questions/9164146/simple-gun-in-cocos2dbox2d-game ios cocos2d box2d box2d iphone share improve this question The easiest way is to look at the direction the gun is pointing when you define the body and use GetWorldVector to see how it has changed. For example if the gun is pointing directly upwards.. gun is pointing when you define the body and use GetWorldVector to see how it has changed. For example if the gun is pointing directly upwards when you create the body this would be the direction 0 1 . Then you can use GetWorldVector at any time..
iphone error: expected '=', ',', ';', 'asm' or '__attribute__' before ' 'foo' http://stackoverflow.com/questions/990906/iphone-error-expected-asm-or-attribute-before-foo before 'foo' mean ... I get this error multiple times for different files In my situation the first error is pointing at 'MeterTable'.. a class that includes stdlib.h stdio.h and math.h . But those files seem to be importing fine if i remove..
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