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2014/10/15 ¤U¤È 10:11:00
iphone Programming Glossary: lessUIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs the center of the ClipView . Make sure the ClipView 's clipsToBounds is set to YES if its width is less than that of its parent view. Also the ClipView needs a reference to the UIScrollView . The final step..
Verify receipt for in App purchase http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase add the receipt data to my database. The store kit programming guide and the class references are less than useless for this particular area as they don't really give you any sort of example I did find one.. data to my database. The store kit programming guide and the class references are less than useless for this particular area as they don't really give you any sort of example I did find one useful article..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self or self mainViewController when retrieving this value too. In general classes are much less likely to have important code in their getter methods than their setters but it's still possible that..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata fileLocation UIImage imageWithData imageData I prefer the first one because it's a lot less code but I have seen some people saying that the image is cached and that this method uses more memory.. from memory when you're done. If you don't have any huge images I wouldn't worry about it. Unless you see a problem and kudos for checking Object Allocation instead of preemptively optimizing I would..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel attributedText else iOS5 and below Here we have some options too. The first one is to do something less fancy and show it just as plain text without attributes. The second is to use CoreText and get similar..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints take approach as if you scroll the pages you can see a lower res version of the page for just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so.. your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it. So I guess #import QuartzCore QuartzCore.h UIImage imageWithView UIView..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split.. this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation into..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers Variables or singletons This includes your application delegate Direct dependencies make your code less reusable And more difficult to debug test Ok. I'm down with that. Don't blindly toss all your methods.. the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation data. Second see page 10 of the Stanford presentation for an example of how..
How to convert NSData to byte array in iPhone? http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone len as indicated by others if you want to use a fixed length array. This avoids malloc free but is less extensible and more prone to buffer overflow issues so I rarely ever use it. share improve this answer..
Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK? http://stackoverflow.com/questions/7760946/is-it-possible-to-target-older-ios-versions-when-using-xcode-4-2-and-ios-5-sdk able to debug and test on my iphone 4 with iOS 5 installed. For any of my devices running any iOS less than 5.0 Xcode just says Finished running for iPhone3GS and doesn't run it. I have my deployment target..
How can we programmatically detect which iOS version is device running on? [duplicate] http://stackoverflow.com/questions/7848766/how-can-we-programmatically-detect-which-ios-version-is-device-running-on Check iPhone iOS Version 15 answers I want to check if the user is running the app on iOS less than 5.0 and display a label in the app. How do I detect which iOS is running on user's device programmatically..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 It also experiences a significant speedup in practice when compared to using glReadPixels although less than I see with the pixel buffer pool I use with AVAssetWriter. It's a shame that none of this is documented..
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs have under normal circumstances. Place the UIScrollView in the center of the ClipView . Make sure the ClipView 's clipsToBounds is set to YES if its width is less than that of its parent view. Also the ClipView needs a reference to the UIScrollView . The final step is to override UIView hitTest withEvent inside the ClipView..
Verify receipt for in App purchase http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase to the app store and once I get a valid response I intend to add the receipt data to my database. The store kit programming guide and the class references are less than useless for this particular area as they don't really give you any sort of example I did find one useful article which helped me out a bit but something is.. and once I get a valid response I intend to add the receipt data to my database. The store kit programming guide and the class references are less than useless for this particular area as they don't really give you any sort of example I did find one useful article which helped me out a bit but something is still wrong...
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self future proof your code you should also be using self.mainViewController or self mainViewController when retrieving this value too. In general classes are much less likely to have important code in their getter methods than their setters but it's still possible that accessing directly could break something in a future version..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata ofType extension NSData imageData NSData dataWithContentsOfFile fileLocation UIImage imageWithData imageData I prefer the first one because it's a lot less code but I have seen some people saying that the image is cached and that this method uses more memory Since I don't trust people on most other forums I thought.. to load the image from a data object to make sure it's removed from memory when you're done. If you don't have any huge images I wouldn't worry about it. Unless you see a problem and kudos for checking Object Allocation instead of preemptively optimizing I would choose less lines of code over negligible memory improvements...
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel it in our UILabel and we are done _label setAttributedText attributedText else iOS5 and below Here we have some options too. The first one is to do something less fancy and show it just as plain text without attributes. The second is to use CoreText and get similar results with a bit more of code. Interested people please..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints kicks in once the scale is 1. iBooks takes a similar double take approach as if you scroll the pages you can see a lower res version of the page for just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the layer before it starts.. to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though Recycle page objects by doing pointer swaps or destroy..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display 4 as on the other iPhones. I'll bet either the iPhone 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it. So I guess #import QuartzCore QuartzCore.h UIImage imageWithView UIView view UIGraphicsBeginImageContextWithOptions view.bounds.size..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees to go Thanks Blake. iphone cocoa touch core animation core graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation into pieces. As an example the following code.. iphone cocoa touch core animation core graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation into pieces. As an example the following code will spin a view once..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers Page 16 51 How Not To Share Data Global Variables or singletons This includes your application delegate Direct dependencies make your code less reusable And more difficult to debug test Ok. I'm down with that. Don't blindly toss all your methods that will be used for communicating between the viewcontroller.. of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation data. Second see page 10 of the Stanford presentation for an example of how to programmatically push a controller onto the navigation..
How to convert NSData to byte array in iPhone? http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone
Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK? http://stackoverflow.com/questions/7760946/is-it-possible-to-target-older-ios-versions-when-using-xcode-4-2-and-ios-5-sdk to use my iPhone 3Gs with iOS 4.2.1 for debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed. For any of my devices running any iOS less than 5.0 Xcode just says Finished running for iPhone3GS and doesn't run it. I have my deployment target set to 3.0 because I am not using any features in my app..
How can we programmatically detect which iOS version is device running on? [duplicate] http://stackoverflow.com/questions/7848766/how-can-we-programmatically-detect-which-ios-version-is-device-running-on on duplicate This question already has an answer here Check iPhone iOS Version 15 answers I want to check if the user is running the app on iOS less than 5.0 and display a label in the app. How do I detect which iOS is running on user's device programmatically Thanks iphone objective c ios cocoa touch ios4..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 in this answer that I've used for raw pixel extraction. It also experiences a significant speedup in practice when compared to using glReadPixels although less than I see with the pixel buffer pool I use with AVAssetWriter. It's a shame that none of this is documented anywhere because it provides a huge boost to video..
Iphone - How to encrypt NSData with public key and decrypt with private key? http://stackoverflow.com/questions/10072124/iphone-how-to-encrypt-nsdata-with-public-key-and-decrypt-with-private-key Decrypt data with private key int len strlen inputString TODO this is a hack since i know inputString length will be less than BUFFER_SIZE if len BUFFER_SIZE len BUFFER_SIZE 1 plainBuffer uint8_t calloc BUFFER_SIZE sizeof uint8_t cipherBuffer..
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs the UIScrollView in the center of the ClipView . Make sure the ClipView 's clipsToBounds is set to YES if its width is less than that of its parent view. Also the ClipView needs a reference to the UIScrollView . The final step is to override UIView..
Verify receipt for in App purchase http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase response I intend to add the receipt data to my database. The store kit programming guide and the class references are less than useless for this particular area as they don't really give you any sort of example I did find one useful article which.. to add the receipt data to my database. The store kit programming guide and the class references are less than useless for this particular area as they don't really give you any sort of example I did find one useful article which helped me..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self using self.mainViewController or self mainViewController when retrieving this value too. In general classes are much less likely to have important code in their getter methods than their setters but it's still possible that accessing directly..
Max size iPad / iPhone Offline Application Cache http://stackoverflow.com/questions/2772908/max-size-ipad-iphone-offline-application-cache question I have the same problem on iPhone. On iPad though I figured a turn around. If your manifest contains files less than 5MB the first time and you update the cache by window.applicationCache.update and before doing the update you increase..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata NSData dataWithContentsOfFile fileLocation UIImage imageWithData imageData I prefer the first one because it's a lot less code but I have seen some people saying that the image is cached and that this method uses more memory Since I don't trust.. to make sure it's removed from memory when you're done. If you don't have any huge images I wouldn't worry about it. Unless you see a problem and kudos for checking Object Allocation instead of preemptively optimizing I would choose less lines..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel setAttributedText attributedText else iOS5 and below Here we have some options too. The first one is to do something less fancy and show it just as plain text without attributes. The second is to use CoreText and get similar results with a bit..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints takes a similar double take approach as if you scroll the pages you can see a lower res version of the page for just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so that the PDF image.. drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though Recycle page objects..
Do iPhone / Android browsers support CSS @media handheld? http://stackoverflow.com/questions/3893342/do-iphone-android-browsers-support-css-media-handheld the use of handheld or mobile stylesheets since it and other iOS devices were capable of rendering css more or less on a par with desktop browsers via Safari. For other devices I'm unsure exactly how faithful they are though the A List..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display either the iPhone 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it. So I guess #import QuartzCore QuartzCore.h UIImage imageWithView UIView view UIGraphicsBeginImageContextWithOptions..
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 class method you may cause problems to arise. In most cases the super class is expecting that method to be called unless documented otherwise . If you apply this same thought to swizzling you've covered most issues. Always call the original.. void load self swizzle @selector setFrame with IMP MySetFrame store IMP SetFrameIMP @end While this looks a little less like Objective C since it's using function pointers it avoids any naming conflicts. In principle it's doing the exact same..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees core animation core graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation into.. graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation into pieces. As an example..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers Share Data Global Variables or singletons This includes your application delegate Direct dependencies make your code less reusable And more difficult to debug test Ok. I'm down with that. Don't blindly toss all your methods that will be used.. appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation data. Second see page 10 of the Stanford presentation for an example of how to programmatically..
How to convert NSData to byte array in iPhone? http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone
What does the Xcode 4.2 preference “Support Wirelessly Connected Devices” do? http://stackoverflow.com/questions/7266391/what-does-the-xcode-4-2-preference-support-wirelessly-connected-devices-do does the Xcode 4.2 preference &ldquo Support Wirelessly Connected Devices&rdquo do In Xcode 4.2 there is a new preference under the General tab called iOS Device Discovery with.. 4.2 there is a new preference under the General tab called iOS Device Discovery with the checkbox option Support Wirelessly Connected Devices. What does this option do Once checked how can we use this new capability iphone objective c ios xcode.. page and check the Sync with this XXXX over Wi Fi option In XCode XCode menu Preferences General check the Support Wirelessly Connected Devices Unplug your Device On the device go to Settings General iTunes Wi Fi Sync and click Sync Now In XCode..
Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK? http://stackoverflow.com/questions/7760946/is-it-possible-to-target-older-ios-versions-when-using-xcode-4-2-and-ios-5-sdk debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed. For any of my devices running any iOS less than 5.0 Xcode just says Finished running for iPhone3GS and doesn't run it. I have my deployment target set to 3.0 because..
How can we programmatically detect which iOS version is device running on? [duplicate] http://stackoverflow.com/questions/7848766/how-can-we-programmatically-detect-which-ios-version-is-device-running-on has an answer here Check iPhone iOS Version 15 answers I want to check if the user is running the app on iOS less than 5.0 and display a label in the app. How do I detect which iOS is running on user's device programmatically Thanks ..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 pixel extraction. It also experiences a significant speedup in practice when compared to using glReadPixels although less than I see with the pixel buffer pool I use with AVAssetWriter. It's a shame that none of this is documented anywhere because..
how to increase the label and cell size on clicking on a button on a cell http://stackoverflow.com/questions/15585053/how-to-increase-the-label-and-cell-size-on-clicking-on-a-button-on-a-cell isSelected 0 2 NSString text self.items indexPath.row cell.statusLabel.text text NSString buttonTitle isSelected @ See Less @ See More cell.seeMoreButton setTitle buttonTitle forState UIControlStateNormal cell.seeMoreButton addTarget self action..
Apple Singleton example query? http://stackoverflow.com/questions/2410830/apple-singleton-example-query private notification center there is no reason the class should forbid it. This approach has the following advantages Less code. More flexible in cases where a non shared instance is useful. Most importantly the code does what it says it does...
iPhone OS current usage statistics (esp. 2.x vs 3.x) http://stackoverflow.com/questions/2416240/iphone-os-current-usage-statistics-esp-2-x-vs-3-x
Why does Javascript run so slow on iPhone? http://stackoverflow.com/questions/3307732/why-does-javascript-run-so-slow-on-iphone seemingly created such a bad implementation of Javascript would be interesting as well possibly to make more money Less web apps more apps in the store References http ajaxian.com archives ipad javascript shockingly slow javascript iphone..
Choosing between the two - Interface Builder OR creating via code http://stackoverflow.com/questions/6385516/choosing-between-the-two-interface-builder-or-creating-via-code if you can create and layout a control in Interface Builder that means there is less code in your view controller. Less code is always a good thing less bugs easier to maintain ... . So I believe you should try to define as much of the layout..
Time based GPS location in background (iphone) http://stackoverflow.com/questions/7560154/time-based-gps-location-in-background-iphone detailed accuracy even bigger hit to battery. The backgrounding of location is all or nothing as far as accuracy goes. Less hit less accuracy is startMonitoringForSignificantLocationChange. May not be accurate enough for you. Better depending on..
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