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2014/10/15 ¤U¤È 10:05:21
iphone Programming Glossary: completelyRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate..
How to develop or migrate apps for iPhone 5 screen resolution? http://stackoverflow.com/questions/12395200/how-to-develop-or-migrate-apps-for-iphone-5-screen-resolution code for 4 inch screen else code for 3.5 inch screen Also note The auto rotation API has changed completely take a look at that as well if your application supports any rotation other than default. share improve..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec other convenient uses I'm missing My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored. Is that the case Regarding.. using the property syntax and not only via direct access to the ivar. As for declaring variables completely outside of any @interface or @implementation block yes those are plain C variables and work exactly..
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected to lookup the line of code that corresponds to address locations 0x0006573a and 0x0004fb26 I get completely different match. The atos output is not even from the same class that's mentioned in the crash log MyViewController.. log MyViewController MyImageTask . Instead atos points me to totally benign lines of code in a completely unrelated class. I verified again that I'm working with the exact dSYM and IPA that I submitted to Apple...
Custom Delete button On Editing in UITableView Cell http://stackoverflow.com/questions/1615469/custom-delete-button-on-editing-in-uitableview-cell as the standard for delete buttons. Although if you want something like Tweetie where you completely change the behavior of swiping you could use something like ABTableViewCell where you just draw in your..
How does one get UI_USER_INTERFACE_IDIOM() to work with iPhone OS SDK < 3.2 http://stackoverflow.com/questions/2576356/how-does-one-get-ui-user-interface-idiom-to-work-with-iphone-os-sdk-3-2 and UIUserInterfaceIdiomPad are NOT defined in the SDKs prior to 3.2. This seems to completely defeat the purpose of such a function. They can only be compiled and run on iPhone OS 3.2 iPhone OS..
How can i change the color of pagination dots of UIPageControl? http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol little page dots. If no delegate is registered then the view will not react to touch input. It's completely fresh from the oven but seems to work. Let me know if you run into any problems with it. Future improvements..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions correctly rendered either. A set of different solutions have been presented some of them including completely custom animation via CoreGraphics while others build on the observation that the first view controller..
How to determine the content size of a UIWebView? http://stackoverflow.com/questions/3936041/how-to-determine-the-content-size-of-a-uiwebview share improve this question It turned out that my first guess using sizeThatFits was not completely wrong. It seems to work but only if the frame of the webView is set to a minimal size prior to sending..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app will be the only app that will run until you reboot the device again. As @Cawas has said this completely disables the ability to return to the home screen unless your app crashes including accessibility assistive..
iPhone get SSID without private library http://stackoverflow.com/questions/5198716/iphone-get-ssid-without-private-library get SSID without private library I have a commercial app that has a completely legitimate reason to see the SSID of the network it is connected to If it is connected to a Adhoc network..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning. But the app invariably gets a memory warning due..
Customize the MKAnnotationView callout http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout pin with a custom callout. We can't create a custom callout but we can create an annotation with a completely customized view. So the trick is to add a second annotation when the first is selected and make the..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su transition styles not simply the slide effects the view controller being shown needs to be swapped completely not stacked . If the second view controller must remove another view controller from the stack then..
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable
Objective-C ARC: strong vs retain and weak vs assign http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign for properties introduced by ARC strong and weak . Apart from copy which is obviously something completely different are there any differences between strong vs retain and weak vs assign From my understanding..
http://stackoverflow.com/questions/999313/iphone-app-signing-a-valid-signing-identity-matching-this-profile-could-not-be certificates report as valid but Xcode still won't recognize them. What should I try next Edit I completely re installed Mac OS X and from a fresh install installed the 3.0 SDK and still have the same problem...
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage int byteIndex bytesPerRow uiViewPoint.y uiViewPoint.x bytesPerPixel unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates between UIKit and Core Graphics i.e is..
How to develop or migrate apps for iPhone 5 screen resolution? http://stackoverflow.com/questions/12395200/how-to-develop-or-migrate-apps-for-iphone-5-screen-resolution
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec implementing static variable based singletons before. Are there other convenient uses I'm missing My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored. Is that the case Regarding 5 why would I ever want to declare methods in private..
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected MYAPP 0x000492fc start 36 The funny thing is when I use atos to lookup the line of code that corresponds to address locations 0x0006573a and 0x0004fb26 I get completely different match. The atos output is not even from the same class that's mentioned in the crash log MyViewController MyImageTask . Instead atos points me to totally.. is not even from the same class that's mentioned in the crash log MyViewController MyImageTask . Instead atos points me to totally benign lines of code in a completely unrelated class. I verified again that I'm working with the exact dSYM and IPA that I submitted to Apple. My atos command Applications Xcode.app Contents Developer..
Custom Delete button On Editing in UITableView Cell http://stackoverflow.com/questions/1615469/custom-delete-button-on-editing-in-uitableview-cell button that Apple provides. Why change it Its globally recognizable as the standard for delete buttons. Although if you want something like Tweetie where you completely change the behavior of swiping you could use something like ABTableViewCell where you just draw in your own view. Make a custom table view override touchesBegan..
How does one get UI_USER_INTERFACE_IDIOM() to work with iPhone OS SDK < 3.2 http://stackoverflow.com/questions/2576356/how-does-one-get-ui-user-interface-idiom-to-work-with-iphone-os-sdk-3-2 appropriate iPhone nib file The problem is that UI_USER_INTERFACE_IDIOM and UIUserInterfaceIdiomPad are NOT defined in the SDKs prior to 3.2. This seems to completely defeat the purpose of such a function. They can only be compiled and run on iPhone OS 3.2 iPhone OS 3.2 can only be run on iPad . So if you can use UI_USER_INTERFACE_IDIOM..
How can i change the color of pagination dots of UIPageControl? http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol object to get notifications when the user taps on one of the little page dots. If no delegate is registered then the view will not react to touch input. It's completely fresh from the oven but seems to work. Let me know if you run into any problems with it. Future improvements Resize the dots to fit the current bounds if there..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions landscape after portrait viewController Modal views are not correctly rendered either. A set of different solutions have been presented some of them including completely custom animation via CoreGraphics while others build on the observation that the first view controller loaded from the main nib is always displayed correct. I have..
How to determine the content size of a UIWebView? http://stackoverflow.com/questions/3936041/how-to-determine-the-content-size-of-a-uiwebview current frame size of the webView. iphone cocoa touch uiwebview share improve this question It turned out that my first guess using sizeThatFits was not completely wrong. It seems to work but only if the frame of the webView is set to a minimal size prior to sending sizeThatFits . After that we can correct the wrong frame..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app the first app that is launched when the device is rebooted will be the only app that will run until you reboot the device again. As @Cawas has said this completely disables the ability to return to the home screen unless your app crashes including accessibility assistive touch. Note that after installing the profile you must..
iPhone get SSID without private library http://stackoverflow.com/questions/5198716/iphone-get-ssid-without-private-library get SSID without private library I have a commercial app that has a completely legitimate reason to see the SSID of the network it is connected to If it is connected to a Adhoc network for a 3rd party hardware device it needs to be functioning..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell Thanks. Edit Trying to cache images in an NSMutableDictionary object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning. But the app invariably gets a memory warning due to size of images being cached and clears the cache before..
Customize the MKAnnotationView callout http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout share improve this question I understand you want a pin with a custom callout. We can't create a custom callout but we can create an annotation with a completely customized view. So the trick is to add a second annotation when the first is selected and make the 2nd annotation view look like a callout bubble. This is the..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su Nav Controller use is fine but there needs to be animated transition styles not simply the slide effects the view controller being shown needs to be swapped completely not stacked . If the second view controller must remove another view controller from the stack then it's not encapsulated enough. Edit 2 iOS 4 should be the base..
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable
Objective-C ARC: strong vs retain and weak vs assign http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign weak vs assign There are two new memory management attributes for properties introduced by ARC strong and weak . Apart from copy which is obviously something completely different are there any differences between strong vs retain and weak vs assign From my understanding the only difference here is that weak will assign nil to the..
http://stackoverflow.com/questions/999313/iphone-app-signing-a-valid-signing-identity-matching-this-profile-could-not-be provisioning profile and double click it to install All the certificates report as valid but Xcode still won't recognize them. What should I try next Edit I completely re installed Mac OS X and from a fresh install installed the 3.0 SDK and still have the same problem. iphone ios xcode share improve this question Had the..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage uiViewPoint.x bytesPerPixel unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates..
How to develop or migrate apps for iPhone 5 screen resolution? http://stackoverflow.com/questions/12395200/how-to-develop-or-migrate-apps-for-iphone-5-screen-resolution
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec before. Are there other convenient uses I'm missing My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored. Is that the case Regarding 5 why would I.. to be able to set it using the property syntax and not only via direct access to the ivar. As for declaring variables completely outside of any @interface or @implementation block yes those are plain C variables and work exactly the same. share improve..
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected is when I use atos to lookup the line of code that corresponds to address locations 0x0006573a and 0x0004fb26 I get completely different match. The atos output is not even from the same class that's mentioned in the crash log MyViewController MyImageTask.. mentioned in the crash log MyViewController MyImageTask . Instead atos points me to totally benign lines of code in a completely unrelated class. I verified again that I'm working with the exact dSYM and IPA that I submitted to Apple. My atos command..
Custom Delete button On Editing in UITableView Cell http://stackoverflow.com/questions/1615469/custom-delete-button-on-editing-in-uitableview-cell it Its globally recognizable as the standard for delete buttons. Although if you want something like Tweetie where you completely change the behavior of swiping you could use something like ABTableViewCell where you just draw in your own view. Make a..
How does one get UI_USER_INTERFACE_IDIOM() to work with iPhone OS SDK < 3.2 http://stackoverflow.com/questions/2576356/how-does-one-get-ui-user-interface-idiom-to-work-with-iphone-os-sdk-3-2 is that UI_USER_INTERFACE_IDIOM and UIUserInterfaceIdiomPad are NOT defined in the SDKs prior to 3.2. This seems to completely defeat the purpose of such a function. They can only be compiled and run on iPhone OS 3.2 iPhone OS 3.2 can only be run..
How can i change the color of pagination dots of UIPageControl? http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol taps on one of the little page dots. If no delegate is registered then the view will not react to touch input. It's completely fresh from the oven but seems to work. Let me know if you run into any problems with it. Future improvements Resize the..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions Modal views are not correctly rendered either. A set of different solutions have been presented some of them including completely custom animation via CoreGraphics while others build on the observation that the first view controller loaded from the main..
How to determine the content size of a UIWebView? http://stackoverflow.com/questions/3936041/how-to-determine-the-content-size-of-a-uiwebview cocoa touch uiwebview share improve this question It turned out that my first guess using sizeThatFits was not completely wrong. It seems to work but only if the frame of the webView is set to a minimal size prior to sending sizeThatFits . After..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app the device is rebooted will be the only app that will run until you reboot the device again. As @Cawas has said this completely disables the ability to return to the home screen unless your app crashes including accessibility assistive touch. Note..
iPhone get SSID without private library http://stackoverflow.com/questions/5198716/iphone-get-ssid-without-private-library get SSID without private library I have a commercial app that has a completely legitimate reason to see the SSID of the network it is connected to If it is connected to a Adhoc network for a 3rd party..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell in an NSMutableDictionary object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning. But the app invariably gets a memory warning due to size of images being..
Customize the MKAnnotationView callout http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout you want a pin with a custom callout. We can't create a custom callout but we can create an annotation with a completely customized view. So the trick is to add a second annotation when the first is selected and make the 2nd annotation view..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su to be animated transition styles not simply the slide effects the view controller being shown needs to be swapped completely not stacked . If the second view controller must remove another view controller from the stack then it's not encapsulated..
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable
Objective-C ARC: strong vs retain and weak vs assign http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign management attributes for properties introduced by ARC strong and weak . Apart from copy which is obviously something completely different are there any differences between strong vs retain and weak vs assign From my understanding the only difference..
http://stackoverflow.com/questions/999313/iphone-app-signing-a-valid-signing-identity-matching-this-profile-could-not-be it to install All the certificates report as valid but Xcode still won't recognize them. What should I try next Edit I completely re installed Mac OS X and from a fresh install installed the 3.0 SDK and still have the same problem. iphone ios xcode..
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