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2014/10/15 ¤U¤È 10:06:55
iphone Programming Glossary: discussionUIView's frame, bounds, center, origin, when to use what? http://stackoverflow.com/questions/1071112/uiviews-frame-bounds-center-origin-when-to-use-what property will allow you to draw outside of the frame or restrict drawing to a smaller area within the frame. A good discussion of this can be found at the link below. It is uncommon for this property to be manipulated unless there is specific need..
iOS: Keep an app running like a service http://stackoverflow.com/questions/11044095/ios-keep-an-app-running-like-a-service location newstand. Even if it has one of these types an app cannot execute without restrictions. The rest of this discussion assumes the app does not have a background mode. If you try to use one of these background modes to enable your app to be..
http://stackoverflow.com/questions/1106861/round-corners-on-uitableview the cell. I'm trying to clip the view so the corners are always round regardless of scroll position. I saw another discussion about doing this to a UIImage that suggested masking it with another image. I'm not sure if this would work because I need..
Can we run Java applictions on iPhone? http://stackoverflow.com/questions/1193524/can-we-run-java-applictions-on-iphone I am a bit confused... Please bear with me have a look to these links and answer LINK 1 LINK 2 LINK 3 This is an Open discussion. All ideas are appreciated. Thank You All. java iphone java me j2mepolish share improve this question Currently there..
gcc-4.2 failed with exit code 1 iphone http://stackoverflow.com/questions/1248520/gcc-4-2-failed-with-exit-code-1-iphone 4.2 failed with exit code 1 iphone I've seen this error with different variations on discussion forums but being a non programmer I'm not sure how to progress this. Basically I have code which I found to help me with.. Command Developer Platforms iPhoneSimulator.platform Developer usr bin gcc 4.2 failed with exit code 1 iphone Some discussions talk about libraries but because I don't have a programming background I don't understand what to do. I also see that some..
Method Swizzle on iPhone device http://stackoverflow.com/questions/1637604/method-swizzle-on-iphone-device Whats the trick TIA iphone objective c swizzling share improve this question The CocoaDev wiki has an extensive discussion on method swizzling here . Mike Ash has a relatively simple implementation at the bottom of that page #import objc runtime.h..
How does -performSelector:withObject:afterDelay: work? http://stackoverflow.com/questions/1922517/how-does-performselectorwithobjectafterdelay-work From the docs Invokes a method of the receiver on the current thread using the default mode after a delay. The discussion goes further This method sets up a timer to perform the aSelector message on the current thread ™s run loop. The timer is..
What is a “delegate” in Objective C's iPhone development? [duplicate] http://stackoverflow.com/questions/2534094/what-is-a-delegate-in-objective-cs-iphone-development is a delegate in Objective C's iPhone development iphone ios objective c share improve this question See this discussion A delegate allows one object to send messages to another object when an event happens. For example if you're downloading..
How to accommodate for the iPhone 4 screen resolution? http://stackoverflow.com/questions/2992360/how-to-accommodate-for-the-iphone-4-screen-resolution
Embedding Python in an iPhone app http://stackoverflow.com/questions/3691655/embedding-python-in-an-iphone-app legal to include a Python interpreter in an iPhone App Store app. How does one go about doing this All the existing discussion unsurprisingly refers to jailbreaking. Older question Can I write native iPhone apps using Python My goal here isn't to..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode how much trouble that caused so many developers for so long Purely for historical reasons here is the original discussion and solution to repeat this is totally irrelevant now It is EXTREMELY DIFFICULT to make this work fully properly there are..
http://stackoverflow.com/questions/412982/iphone-unzip-code it is 'PK' it's WinZip if it's 0x1F8B it's gZip. Because this is iPhone specific have a look at this iPhone SDK forum discussion where miniZip is mentioned. It seems this can handle WinZip files. But if it's really a WinZip file you should have a look..
What's the best way to put a c-struct in an NSArray? http://stackoverflow.com/questions/4516991/whats-the-best-way-to-put-a-c-struct-in-an-nsarray difference between valueWithBytes and valueWithPointer raised by justin and catfish below. Here's a link to Apple's discussion of valueWithBytes objCType for future readers... For some lateral thinking and looking more at performance Evgen has raised..
Cannot view Quicktime movies over HTTPS in Safari or UIWebView http://stackoverflow.com/questions/4660189/cannot-view-quicktime-movies-over-https-in-safari-or-uiwebview my app as being the problem and the same thing happened. If I use HTTP it works fine. This thread has a similar discussion but no resolution http discussions.apple.com thread.jspa messageID 12908818 I am not using self signed certs my machine.. and the same thing happened. If I use HTTP it works fine. This thread has a similar discussion but no resolution http discussions.apple.com thread.jspa messageID 12908818 I am not using self signed certs my machine has a registered SSL cert and I pushed..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices this in several of its applications overlapping the solution described by Chris. For an in depth theoretical discussion of syncing see the paper from Russ Cox MIT and William Josephson Princeton File Synchronization with Vector Time Pairs which..
http://stackoverflow.com/questions/5355846/iphone-facebook-video-upload in the FBVideoUpload class header but the interface is pretty much self explanatory. There ™s also some helpful discussion under my pull request especially the thing about SSL certificates on the api video cluster that could make the whole issue..
When an iOS application goes to the background, are lengthy tasks paused? http://stackoverflow.com/questions/6650717/when-an-ios-application-goes-to-the-background-are-lengthy-tasks-paused that thread appears to be paused if the application returns from applicationDidEnterBackground according to the discussion in this answer . It will be resumed when the application is brought back to the foreground. However in the latter case you..
Why is this code not recognising the NSString as being equal? http://stackoverflow.com/questions/8625936/why-is-this-code-not-recognising-the-nsstring-as-being-equal
Iframe Content Not Rendering Under Scroll In iOs5 iPad/iPhone http://stackoverflow.com/questions/8912218/iframe-content-not-rendering-under-scroll-in-ios5-ipad-iphone width 100 overflow scroll webkit overflow scrolling touch iframe id myIframe src http http css tricks.com forums discussion 11946 scrolling iframe on ipad p1 iframe div The problem is that the off screen iframe content is not becoming visible when..
UIScrollView image/photo viewer with paging enabled and zooming http://stackoverflow.com/questions/975708/uiscrollview-image-photo-viewer-with-paging-enabled-and-zooming of the photo next to it which isn't what you get when trying this with a standard UIScrollView. I've seen discussion about nesting the UIScrollView's but I really don't want to go there. Has anybody managed this with the standard UIScrollView..
iPad : UIPageViewController navigationOrientation http://stackoverflow.com/questions/10430083/ipad-uipageviewcontroller-navigationorientation method of the delegate. Seems as if Apple's preferred way of reacting to device orientation changes is this one Discussion Use this method to change the spine location when the device orientation changes as well as setting new view controllers..
UIImagePickerController with camera source with allows editing yes : video trimming doesn't work http://stackoverflow.com/questions/10673269/uiimagepickercontroller-with-camera-source-with-allows-editing-yes-video-trimm indicating whether the user is allowed to edit a selected still image or movie. @property nonatomic BOOL allowsEditing Discussion If you allow the user to edit still images or movies the delegate may receive a dictionary with information about the edits..
Understanding iOS 6 Interface orientation change http://stackoverflow.com/questions/12778636/understanding-ios-6-interface-orientation-change see I'm trying to return landscape orientation in preferred method but it is never called. p.s. documentation states Discussion The system calls this method when presenting the view controller full screen. You implement this method when your view controller..
Underline text in a UITextView http://stackoverflow.com/questions/13112965/underline-text-in-a-uitextview attributedText The styled text displayed by the text view. @property nonatomic copy NSAttributedString attributedText Discussion This property is nil by default. Assigning a new value to this property also replaces the value of the text property with..
core data: [NSFetchedResultsController -fetchedObjects], will this method reflect object change? http://stackoverflow.com/questions/13391934/core-data-nsfetchedresultscontroller-fetchedobjects-will-this-method-reflec this mean in its Document fetchedObjects The results of the fetch. @property nonatomic readonly NSArray fetchedObjects Discussion The value of the property is nil if performFetch hasn ™t been called. The results array only includes instances of the entity..
How do I change the Navigation Bar color in iOS 7? http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7 Reference The tint color to apply to the navigation bar background. @property nonatomic retain UIColor barTintColor Discussion This color is made translucent by default unless you set the translucent property to NO . Availability Available in iOS..
Change UITextField background when editing begins http://stackoverflow.com/questions/1993598/change-uitextfield-background-when-editing-begins documentation borderStyle The border style used by the text field. @property nonatomic UITextBorderStyle borderStyle Discussion The default value for this property is UITextBorderStyleNone. If a custom background image is set this property is ignored... the background appearance of the text field when it is enabled. @property nonatomic retain UIImage background Discussion When set the image referred to by this property replaces the standard appearance controlled by the borderStyle property...
CLLocationManager and degrees of heading in iPhone http://stackoverflow.com/questions/2043685/cllocationmanager-and-degrees-of-heading-in-iphone measured in degrees relative to true North. read only @property readonly nonatomic CLLocationDirection trueHeading Discussion The value in this property represents the heading that points toward the geographic North Pole. The value in this property..
Make UINavigationBar transparent http://stackoverflow.com/questions/2315862/make-uinavigationbar-transparent new forBarMetrics UIBarMetricsDefault self.navigationBar.shadowImage UIImage new self.navigationBar.translucent YES Discussion Setting translucent to YES on the navigation bar does the trick due to a behavior discussed in the UINavigationBar documentation...
http://stackoverflow.com/questions/3791067/check-url-validity According to NSURL Class Reference Returns whether the resource pointed to by a file URL can be reached. ... Discussion This method is unimplemented in iOS so it performs no operation So it only works for file URLs which your URL probably isn't..
How to restrict my app to landscape mode? http://stackoverflow.com/questions/4078429/how-to-restrict-my-app-to-landscape-mode the device it turns Portrait mode so is still necessary to override shouldAutorotateToIntercafeOrientation as above Discussion If this wouldn't be a bug I would expect a warning or execution error exception or something when starting the app in a..
iPhone: Get warning when battery power is very low http://stackoverflow.com/questions/4677515/iphone-get-warning-when-battery-power-is-very-low docs batteryLevel The battery charge level for the device. read only @property nonatomic readonly float batteryLevel Discussion Battery level ranges from 0.0 fully discharged to 1.0 100 charged . Before accessing this property ensure that battery monitoring..
How do I pop the view controller underneath a pushed view controller? http://stackoverflow.com/questions/4985816/how-do-i-pop-the-view-controller-underneath-a-pushed-view-controller animate the pushing or popping of the top view controller. If NO replace the view controllers without any animations. Discussion You can use this method to update or replace the current view controller stack without pushing or popping each controller..
What are the Dangers of Method Swizzling in Objective C? http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c can be said about swizzling. You should form your own opinion once you fully understand both the good and the bad. Discussion Here are some of the pitfalls of method swizzling Method swizzling is not atomic Changes behavior of un owned code Possible..
Custom camera zoom functionality on iPhone http://stackoverflow.com/questions/5794892/custom-camera-zoom-functionality-on-iphone The transform to apply to the camera ™s preview image. @property nonatomic CGAffineTransform cameraViewTransform Discussion This transform affects the live preview image only and does not affect your custom overlay view or the default image picker..
image clicked from iPhone in Portrait mode gets rotated by 90 degree http://stackoverflow.com/questions/5973105/image-clicked-from-iphone-in-portrait-mode-gets-rotated-by-90-degree The orientation of the receiver ™s image. read only @property nonatomic readonly UIImageOrientation imageOrientation Discussion Image orientation affects the way the image data is displayed when drawn. By default images are displayed in the œup orientation...
Does Key Value Observing Work on UITextView's Text Property? http://stackoverflow.com/questions/6333600/does-key-value-observing-work-on-uitextviews-text-property options NSKeyValueObservingOptionNew context NULL cell _textViewCell self.textViewCell nil break return cell Discussion Each cell is loaded from an external NIB file then initialized with different properties. All of the cells work with key..
iPhone 4 is there an absolutely certain way to have a long term NSTimer fire http://stackoverflow.com/questions/8449351/iphone-4-is-there-an-absolutely-certain-way-to-have-a-long-term-nstimer-fire mainQueue invalidator return invalidator Note the thread checks before using dispatch_sync because... dispatch_sync Discussion ¦] Calling this function and targeting the current queue results in deadlock . from The GCD Reference emphasis mine share..
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