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2014/10/15 ¤U¤È 10:03:50
iphone Programming Glossary: approachAdd UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how I just spent a few hours working through this problem and ultimately decided to take a different approach. I replaced the call to show the action sheet with a modal view controller containing a simple tableview... source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use import the SimpleTableViewController class in..
How to access SOAP services from iPhone http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone support for SOAP in the iPhone SDK. So if I do want to build that app I'll need to come up with a approach to access SOAP services from the iPhone. What would be the best approach Any best practices Did someone.. need to come up with a approach to access SOAP services from the iPhone. What would be the best approach Any best practices Did someone already write a library using the functionality that is present in the..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone . I was curious as a relatively inexperienced iPhone developer whether anyone could recommend an approach and a suitable JSON implementation for the iPhone which would allow me to 1 convert the core data records..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application url NSURL launchOptions valueForKey UIApplicationLaunchOptionsURLKey Note that this is the same approach we used for handling custom URL schemes. You can separate the file URLs from others by using code like..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 one for device. Apple has now disabled that too. References This is a great idea it's an excellent approach but it doesn't work http www.drobnik.com touch 2010 04 universal static libraries There's some bugs..
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 keep cropping up. UIImage Method PDF's in a UIImage don't optically scale as well as a Layer approach. The CPU and memory hit on generating the UIImages from a PDFcontext limits prevents using it to create.. is x1. CATiledLayer rendering 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.. on TiledLayers init frequently used arrays with placeholder objects alternitively another design approach is this one Note that images will render faster than a CGPDFPageRef Use NSOperations or GCD Blocks to..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events still running you must jump back into your last state after wakeup. I don't know if this is the approach of the apps you mentioned before but it works for me. Hope I could help Update After measuring the time.. your Console to see what happens... Have Fun Update 2 Sometimes simplifying things helps. My new approach is this one void applicationDidEnterBackground UIApplication application UIApplication app UIApplication.. location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience this is a better..
Change User Agent in UIWebView (iPhone SDK) http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk iphone cocoa touch share improve this question With iOS 5 changes I recommend the following approach originally from this StackOverflow question UIWebView iOS5 changing user agent as pointed out in an..
How do I size a UITextView to its content? http://stackoverflow.com/questions/50467/how-do-i-size-a-uitextview-to-its-content it is equal to frame.size This will not work if auto layout is ON. With auto layout the general approach is to use the sizeThatFits method and update the constant value on a height constraint. CGSize sizeThatShouldFitTheContent..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c To define your own delegates you'll have to declare their methods somewhere. There are two basic approaches discussed in the Apple Docs on protocols 1 An Informal Protocol This can be done as NSWindow does.. method is straight forward and common in Apple's libraries but new code should use the more modern approach below. 2 A Formal Protocol The newer option is to declare a formal protocol. The declaration would look..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice forView myview cache YES myview removeFromSuperview UIView commitAnimations What is the best approach If you could provide a snippet as well it'd be much appreciated. NOTE I've been unable to get the second.. could provide a snippet as well it'd be much appreciated. NOTE I've been unable to get the second approach to work correctly. iphone ios cocoa touch uiview core animation share improve this question From..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application to get the current location without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication.. user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how as it can lead to serious invalid context errors in iOS 7. I just spent a few hours working through this problem and ultimately decided to take a different approach. I replaced the call to show the action sheet with a modal view controller containing a simple tableview. There are many ways to accomplish this. Here's one way.. In SimpleTableViewController.m implement the tableview data source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use import the SimpleTableViewController class in your ViewController.h conform to the SimpleTableViewDelegate..
How to access SOAP services from iPhone http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone a bit of Googling lead to the conclusion that there is no support for SOAP in the iPhone SDK. So if I do want to build that app I'll need to come up with a approach to access SOAP services from the iPhone. What would be the best approach Any best practices Did someone already write a library using the functionality that is.. SOAP in the iPhone SDK. So if I do want to build that app I'll need to come up with a approach to access SOAP services from the iPhone. What would be the best approach Any best practices Did someone already write a library using the functionality that is present in the iPhone SDK to access SOAP services Since the service I need..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone consisting of two entities linked by a to many relationship . I was curious as a relatively inexperienced iPhone developer whether anyone could recommend an approach and a suitable JSON implementation for the iPhone which would allow me to 1 convert the core data records into a JSON string whilst maintaining the relationship..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application delegate method using code like the following NSURL url NSURL launchOptions valueForKey UIApplicationLaunchOptionsURLKey Note that this is the same approach we used for handling custom URL schemes. You can separate the file URLs from others by using code like the following if url isFileURL Handle file being passed in..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 Throughout 2009 we made pairs of static libs one for sim one for device. Apple has now disabled that too. References This is a great idea it's an excellent approach but it doesn't work http www.drobnik.com touch 2010 04 universal static libraries There's some bugs in his script that means it only works on his machine he should..
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 draw a large PDF in a Zoomable UIScrollview But the same issues keep cropping up. UIImage Method PDF's in a UIImage don't optically scale as well as a Layer approach. The CPU and memory hit on generating the UIImages from a PDFcontext limits prevents using it to create a real time render of new zoom levels. CATiledLayer Method.. thread issues here too and presenting it while the scale is x1. CATiledLayer rendering 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.. media to disk when you can. Use larger tileSizes if rendering on TiledLayers init frequently used arrays with placeholder objects alternitively another design approach is this one Note that images will render faster than a CGPDFPageRef Use NSOperations or GCD Blocks to prepare pages ahead of time. call CGContextSetInterpolationQuality..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events your app will be terminated some time later. To make it appear still running you must jump back into your last state after wakeup. I don't know if this is the approach of the apps you mentioned before but it works for me. Hope I could help Update After measuring the time of the BG task there was a surprise. The BG Task is limited.. from the long running task. Just try it out. Use your Console to see what happens... Have Fun Update 2 Sometimes simplifying things helps. My new approach is this one void applicationDidEnterBackground UIApplication application UIApplication app UIApplication sharedApplication it's better to move dispatch_block_t.. For my own experience I measured something. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience this is a better approach. Maybe other Apps work like this hiding its behavior..
Change User Agent in UIWebView (iPhone SDK) http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk the way it is say for an embedded IE browser in a Windows app iphone cocoa touch share improve this question With iOS 5 changes I recommend the following approach originally from this StackOverflow question UIWebView iOS5 changing user agent as pointed out in an answer below. In comments on that page it appears to work in..
How do I size a UITextView to its content? http://stackoverflow.com/questions/50467/how-do-i-size-a-uitextview-to-its-content has been added to the view with addSubview . Prior to that it is equal to frame.size This will not work if auto layout is ON. With auto layout the general approach is to use the sizeThatFits method and update the constant value on a height constraint. CGSize sizeThatShouldFitTheContent _textView sizeThatFits _textView.frame.size..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c view controller is often the delegate of a view it contains. To define your own delegates you'll have to declare their methods somewhere. There are two basic approaches discussed in the Apple Docs on protocols 1 An Informal Protocol This can be done as NSWindow does in a category on NSObject. For example continuing the example.. simply implement this method and they're done. This method is straight forward and common in Apple's libraries but new code should use the more modern approach below. 2 A Formal Protocol The newer option is to declare a formal protocol. The declaration would look like this @protocol NSWindowNotifications NSObject @optional..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice setAnimationTransition UIViewAnimationTransitionFlipFromRight forView myview cache YES myview removeFromSuperview UIView commitAnimations What is the best approach If you could provide a snippet as well it'd be much appreciated. NOTE I've been unable to get the second approach to work correctly. iphone ios cocoa touch uiview.. UIView commitAnimations What is the best approach If you could provide a snippet as well it'd be much appreciated. NOTE I've been unable to get the second approach to work correctly. iphone ios cocoa touch uiview core animation share improve this question From the UIView reference 's section about the beginAnimations..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application every n minutes but it's not possible to execute some code to get the current location without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as.. execute some code to get the current location without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as I understand this should be used to finish..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how errors in iOS 7. I just spent a few hours working through this problem and ultimately decided to take a different approach. I replaced the call to show the action sheet with a modal view controller containing a simple tableview. There are many.. the tableview data source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use import the SimpleTableViewController class in your ViewController.h..
How to access SOAP services from iPhone http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone that there is no support for SOAP in the iPhone SDK. So if I do want to build that app I'll need to come up with a approach to access SOAP services from the iPhone. What would be the best approach Any best practices Did someone already write a.. to build that app I'll need to come up with a approach to access SOAP services from the iPhone. What would be the best approach Any best practices Did someone already write a library using the functionality that is present in the iPhone SDK to access..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone to many relationship . I was curious as a relatively inexperienced iPhone developer whether anyone could recommend an approach and a suitable JSON implementation for the iPhone which would allow me to 1 convert the core data records into a JSON string..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application the following NSURL url NSURL launchOptions valueForKey UIApplicationLaunchOptionsURLKey Note that this is the same approach we used for handling custom URL schemes. You can separate the file URLs from others by using code like the following if..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 libs one for sim one for device. Apple has now disabled that too. References This is a great idea it's an excellent approach but it doesn't work http www.drobnik.com touch 2010 04 universal static libraries There's some bugs in his script that means..
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 But the same issues keep cropping up. UIImage Method PDF's in a UIImage don't optically scale as well as a Layer approach. The CPU and memory hit on generating the UIImages from a PDFcontext limits prevents using it to create a real time render.. it while the scale is x1. CATiledLayer rendering 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.. if rendering on TiledLayers init frequently used arrays with placeholder objects alternitively another design approach is this one Note that images will render faster than a CGPDFPageRef Use NSOperations or GCD Blocks to prepare pages ahead..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events To make it appear still running you must jump back into your last state after wakeup. I don't know if this is the approach of the apps you mentioned before but it works for me. Hope I could help Update After measuring the time of the BG task there.. Just try it out. Use your Console to see what happens... Have Fun Update 2 Sometimes simplifying things helps. My new approach is this one void applicationDidEnterBackground UIApplication application UIApplication app UIApplication sharedApplication.. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience this is a better approach. Maybe..
Change User Agent in UIWebView (iPhone SDK) http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk in a Windows app iphone cocoa touch share improve this question With iOS 5 changes I recommend the following approach originally from this StackOverflow question UIWebView iOS5 changing user agent as pointed out in an answer below. In comments..
How do I size a UITextView to its content? http://stackoverflow.com/questions/50467/how-do-i-size-a-uitextview-to-its-content . Prior to that it is equal to frame.size This will not work if auto layout is ON. With auto layout the general approach is to use the sizeThatFits method and update the constant value on a height constraint. CGSize sizeThatShouldFitTheContent..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c a view it contains. To define your own delegates you'll have to declare their methods somewhere. There are two basic approaches discussed in the Apple Docs on protocols 1 An Informal Protocol This can be done as NSWindow does in a category on NSObject... they're done. This method is straight forward and common in Apple's libraries but new code should use the more modern approach below. 2 A Formal Protocol The newer option is to declare a formal protocol. The declaration would look like this @protocol..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice forView myview cache YES myview removeFromSuperview UIView commitAnimations What is the best approach If you could provide a snippet as well it'd be much appreciated. NOTE I've been unable to get the second approach to work.. best approach If you could provide a snippet as well it'd be much appreciated. NOTE I've been unable to get the second approach to work correctly. iphone ios cocoa touch uiview core animation share improve this question From the UIView reference..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application to execute some code to get the current location without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler.. without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as I..
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