2014/10/15 下午 10:11:00
iphone Programming Glossary: letsHow do I wrap text in a UITableViewCell without a custom cell http://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell @ Helvetica size 17.0 You'll notice that I set the number of lines for the label to 0. This lets it use as many lines as it needs. The next part is to specify how large your UITableViewCell will be..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller achieve something like an expand animation that means the new view expands from a given rectangle lets say 100 100 220 380 during the animation to full screen. Any suggestions where to start respectively..
upload image from iphone to the server folder http://stackoverflow.com/questions/1939335/upload-image-from-iphone-to-the-server-folder form data boundary @ boundary request addValue contentType forHTTPHeaderField @ Content Type now lets create the body of the post NSMutableData body NSMutableData data body appendData NSString stringWithFormat.. NSUTF8StringEncoding setting the body of the post to the reqeust request setHTTPBody body now lets make the connection to the web NSData returnData NSURLConnection sendSynchronousRequest request returningResponse..
Set the location in iPhone Simulator http://stackoverflow.com/questions/214416/set-the-location-in-iphone-simulator None Custom Location Apple Stores Apple City Bicycle Ride City Run Freeway Drive Custom Location lets you enter a Lat Long value. Bicycle ride City Run and Freeway Drive are simulation of a moving location..
UISegmentedControl selected segment color http://stackoverflow.com/questions/2270526/uisegmentedcontrol-selected-segment-color of selected segment in UISegmentedControl I've found segmentedController.tintColor property which lets me customize color of the whole segmented control. The problem is when I select bright color for tintColor..
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 types in Mail and other applications capable of showing documents. The LSItemContentTypes key lets you provide an array of Uniform Type Identifiers UTIs that your application can open. For a list of..
Is it true that one should not use NSLog() on production code? http://stackoverflow.com/questions/300673/is-it-true-that-one-should-not-use-nslog-on-production-code license key checks and only allow the application to run if it's before a certain date. This lets me distribute a time limited fully functional beta copy with minimal effort on my part. share improve..
Objective-c iPhone percent encode a string? http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string are inadequate. The NSString method misses quite a few characters and the CF function only lets you say which specific characters you want to escape. The proper specification is to escape all characters..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you add individual frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError error.. 因 3 Write some samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that 䏭 quite easy to create from a CGImage. writerInput..
Choosing the right IOS XML parser http://stackoverflow.com/questions/4181690/choosing-the-right-ios-xml-parser . I was thinking about TBXML but I was concerned about its lack of XPath support. For instance lets say my XML file looked like this. blog author foo1 author comments comment text CDATA HTML code that..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root the second level which has a tab bar across the bottom. Each tab item shows a different list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app grab the session key and create a UIWebView to take them to the mobile paypal site. Paypal lets you specify a return URL which you can make anything you want. Just keep checking the UIWebview in the..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview easier to answer. Look at the stringWithContentsOfURL encoding error method of NSString it lets you pass in a URL as an instance of NSURL which can easily be instantiated from NSString and returns..
How do I wrap text in a UITableViewCell without a custom cell http://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell 0 cell.textLabel.font UIFont fontWithName @ Helvetica size 17.0 You'll notice that I set the number of lines for the label to 0. This lets it use as many lines as it needs. The next part is to specify how large your UITableViewCell will be so do that in your heightForRowAtIndexPath function CGFloat..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller animation when pushing a view controller I would like to achieve something like an expand animation that means the new view expands from a given rectangle lets say 100 100 220 380 during the animation to full screen. Any suggestions where to start respectively any documents tutorials links Alright. I could make the expand..
upload image from iphone to the server folder http://stackoverflow.com/questions/1939335/upload-image-from-iphone-to-the-server-folder NSString contentType NSString stringWithFormat @ multipart form data boundary @ boundary request addValue contentType forHTTPHeaderField @ Content Type now lets create the body of the post NSMutableData body NSMutableData data body appendData NSString stringWithFormat @ r n @ r n boundary dataUsingEncoding NSUTF8StringEncoding.. NSString stringWithFormat @ r n @ r n boundary dataUsingEncoding NSUTF8StringEncoding setting the body of the post to the reqeust request setHTTPBody body now lets make the connection to the web NSData returnData NSURLConnection sendSynchronousRequest request returningResponse nil error nil NSString returnString NSString alloc..
Set the location in iPhone Simulator http://stackoverflow.com/questions/214416/set-the-location-in-iphone-simulator the last entry is Location this gives you a sub menu with None Custom Location Apple Stores Apple City Bicycle Ride City Run Freeway Drive Custom Location lets you enter a Lat Long value. Bicycle ride City Run and Freeway Drive are simulation of a moving location in Cupertino of course . Of course this does nothing to..
UISegmentedControl selected segment color http://stackoverflow.com/questions/2270526/uisegmentedcontrol-selected-segment-color selected segment color Is there any way to customize color of selected segment in UISegmentedControl I've found segmentedController.tintColor property which lets me customize color of the whole segmented control. The problem is when I select bright color for tintColor property selected segment becomes almost unrecognizable..
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 images are provided that will be used as icons for the supported types in Mail and other applications capable of showing documents. The LSItemContentTypes key lets you provide an array of Uniform Type Identifiers UTIs that your application can open. For a list of system defined UTIs see Apple's Uniform Type Identifiers Reference..
Is it true that one should not use NSLog() on production code? http://stackoverflow.com/questions/300673/is-it-true-that-one-should-not-use-nslog-on-production-code
Objective-c iPhone percent encode a string? http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string and CFURLCreateStringByAddingPercentEscapes are inadequate. The NSString method misses quite a few characters and the CF function only lets you say which specific characters you want to escape. The proper specification is to escape all characters except a small set. To fix this I created an NSString..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you add individual frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL.. Start a session videoWriter startWriting videoWriter startSessionAtSourceTime 因 3 Write some samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that 䏭 quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer 4 Finish the session..
Choosing the right IOS XML parser http://stackoverflow.com/questions/4181690/choosing-the-right-ios-xml-parser alot of duplicate tags at different points in the hierarchy . I was thinking about TBXML but I was concerned about its lack of XPath support. For instance lets say my XML file looked like this. blog author foo1 author comments comment text CDATA HTML code that must be extracted text author foo2 author comment comment..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root Accounts table view. If you click on any account it goes to the second level which has a tab bar across the bottom. Each tab item shows a different list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app @ theConnection is NULL After this you need to parse the response grab the session key and create a UIWebView to take them to the mobile paypal site. Paypal lets you specify a return URL which you can make anything you want. Just keep checking the UIWebview in the delegate method for this address and then you know the transaction..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview share improve this question The second question is actually easier to answer. Look at the stringWithContentsOfURL encoding error method of NSString it lets you pass in a URL as an instance of NSURL which can easily be instantiated from NSString and returns a string with the complete contents of the page at that URL...
Where's the difference between setObject:forKey: and setValue:forKey: in NSMutableDictionary? http://stackoverflow.com/questions/1249634/wheres-the-difference-between-setobjectforkey-and-setvalueforkey-in-nsmutab share improve this question setValue forKey is part of the NSKeyValueCoding protocol which among other things lets you access object properties from the likes of Interface Builder. setValue forKey is implemented in classes other than NSDictionary..
How do I wrap text in a UITableViewCell without a custom cell http://stackoverflow.com/questions/129502/how-do-i-wrap-text-in-a-uitableviewcell-without-a-custom-cell UIFont fontWithName @ Helvetica size 17.0 You'll notice that I set the number of lines for the label to 0. This lets it use as many lines as it needs. The next part is to specify how large your UITableViewCell will be so do that in your..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller I would like to achieve something like an expand animation that means the new view expands from a given rectangle lets say 100 100 220 380 during the animation to full screen. Any suggestions where to start respectively any documents tutorials..
upload image from iphone to the server folder http://stackoverflow.com/questions/1939335/upload-image-from-iphone-to-the-server-folder @ multipart form data boundary @ boundary request addValue contentType forHTTPHeaderField @ Content Type now lets create the body of the post NSMutableData body NSMutableData data body appendData NSString stringWithFormat @ r n @ r n.. dataUsingEncoding NSUTF8StringEncoding setting the body of the post to the reqeust request setHTTPBody body now lets make the connection to the web NSData returnData NSURLConnection sendSynchronousRequest request returningResponse nil error..
Set the location in iPhone Simulator http://stackoverflow.com/questions/214416/set-the-location-in-iphone-simulator you a sub menu with None Custom Location Apple Stores Apple City Bicycle Ride City Run Freeway Drive Custom Location lets you enter a Lat Long value. Bicycle ride City Run and Freeway Drive are simulation of a moving location in Cupertino of..
UISegmentedControl selected segment color http://stackoverflow.com/questions/2270526/uisegmentedcontrol-selected-segment-color to customize color of selected segment in UISegmentedControl I've found segmentedController.tintColor property which lets me customize color of the whole segmented control. The problem is when I select bright color for tintColor property selected..
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 icons for the supported types in Mail and other applications capable of showing documents. The LSItemContentTypes key lets you provide an array of Uniform Type Identifiers UTIs that your application can open. For a list of system defined UTIs..
Where to start openGL ES to create and rotate a cube in an iPhone? [closed] http://stackoverflow.com/questions/2857463/where-to-start-opengl-es-to-create-and-rotate-a-cube-in-an-iphone opengl es share improve this question I created an OpenGL ES sample application that displays a textured cube and lets you rotate it using touch gestures as part of the class I teach on iPhone development. I warn you though I didn't quite..
iPad/iPhone browser crashing when loading images in Javascript http://stackoverflow.com/questions/2986039/ipad-iphone-browser-crashing-when-loading-images-in-javascript well. Is it possible to deallocate objects in Javascript or does Safari UIWebView keep a running total and never lets go Alternately is there any workaround to load in data another way that doesn't eat up this 10MB javascript iphone ipad..
Is it true that one should not use NSLog() on production code? http://stackoverflow.com/questions/300673/is-it-true-that-one-should-not-use-nslog-on-production-code
Objective-c iPhone percent encode a string? http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string are inadequate. The NSString method misses quite a few characters and the CF function only lets you say which specific characters you want to escape. The proper specification is to escape all characters except a small..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie . The writer has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you add individual frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError error nil AVAssetWriter.. videoWriter startSessionAtSourceTime 因 3 Write some samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that 䏭 quite easy to create from a CGImage. writerInput appendSampleBuffer..
Choosing the right IOS XML parser http://stackoverflow.com/questions/4181690/choosing-the-right-ios-xml-parser points in the hierarchy . I was thinking about TBXML but I was concerned about its lack of XPath support. For instance lets say my XML file looked like this. blog author foo1 author comments comment text CDATA HTML code that must be extracted..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root account it goes to the second level which has a tab bar across the bottom. Each tab item shows a different list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is..
String replacement in Objective-C http://stackoverflow.com/questions/668228/string-replacement-in-objective-c
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app need to parse the response grab the session key and create a UIWebView to take them to the mobile paypal site. Paypal lets you specify a return URL which you can make anything you want. Just keep checking the UIWebview in the delegate method for..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview second question is actually easier to answer. Look at the stringWithContentsOfURL encoding error method of NSString it lets you pass in a URL as an instance of NSURL which can easily be instantiated from NSString and returns a string with the complete..
UIScrollView with “Circular” scrolling http://stackoverflow.com/questions/10448081/uiscrollview-with-circular-scrolling touch uiscrollview uikit share improve this question I've implemented this method but it requires paging enabled . Lets assume you have five elements A B C D and E . When you set up your view you add the last element to the beginning and the..
How can I overlap audio files and combine for iPhone in Xcode? http://stackoverflow.com/questions/12628554/how-can-i-overlap-audio-files-and-combine-for-iphone-in-xcode length. I would like to combine these files overlay the audio from one onto the other NOT join them at ends . Lets say I have two files Audio File A length 30 seconds size 220k Audio File B length 45 seconds size 300k What I'd like a combines..
Received memory warning on setimage http://stackoverflow.com/questions/12773074/received-memory-warning-on-setimage NSUserDomainMask YES documentsPath paths objectAtIndex 0 here 15 is for testing purposes for int i 0 i 15 i Lets not get bogged down here. The problem is not here UIImageView button1AImgVw UIImageView alloc initWithFrame CGRectMake 10..
http://stackoverflow.com/questions/13579209/two-colors-for-uilabel-text to give all its attributes right when we create it. We can change them if we use mutable form of CFAttributeString. Lets choose the colors we want to have in our string CGColorRef _orange UIColor orangeColor .CGColor CGColorRef _green UIColor.. UIColor greenColor .CGColor CGColorRef _red UIColor redColor .CGColor CGColorRef _blue UIColor blueColor .CGColor Lets have our string with first 20 letters as orange next 20 letters as green next 20 as red last remaining as blue CFAttributedStringSetAttribute..
How to calculate the size of a UIFont when text in label is constrained down to fit width? http://stackoverflow.com/questions/1385338/how-to-calculate-the-size-of-a-uifont-when-text-in-label-is-constrained-down-to so that it fits into the label. But now how would you get the size of that UIFont how it is visible in the label Lets imagine the font size was given with huge 100 and the label squeezes it down to 15. And then you want to make some other..
Call function only after reloadData has finished http://stackoverflow.com/questions/15218861/call-function-only-after-reloaddata-has-finished and need to perform a function once the tableView has been reloaded. How do I know if reloadData has finished Lets say I have methodA that populates the tableView and once tableView1 reloadData has been completed I want to call methodB...
How to create project templates in Xcode 4 http://stackoverflow.com/questions/15491826/how-to-create-project-templates-in-xcode-4 on the web that puts it all together Hopefully the steps below will help you to create your own. Setting Up Lets start by getting a copy of an existing Xcode project template to use as a base. Open finder go to Applications and right..
Do I programatically add SubViews in ViewDidAppear, ViewDidLoad, ViewWillAppear, the constructor? http://stackoverflow.com/questions/2280423/do-i-programatically-add-subviews-in-viewdidappear-viewdidload-viewwillappear you can show a nice Waiting message to the user while you get the data. There are other tricks you can use though. Lets say you want a UILabel to fly into the form after the form is loaded. In that case I would add the label to the form in..
UITableView Core Data reordering http://stackoverflow.com/questions/2360938/uitableview-core-data-reordering attribute on a NSManagedObject class. If you can save a managed object then you will be able finish this feature. Lets first take a simple NSManagedObject @interface RowObj NSManagedObject @property nonatomic retain NSString rowDescription..
http://stackoverflow.com/questions/3154443/push-notification-guide push notification system. Iv read the push notification guide on the apple website but still unclear of some things. Lets say i have a windows PC and an iPad. 1 what should the PC be configured with to become a provider Should it be configured..
Making a Objective-C Wrapper for a C++ Library http://stackoverflow.com/questions/4204239/making-a-objective-c-wrapper-for-a-c-library .cpp My Wrapper is LLAHProcessorWrapper.h .mm It compiles fine but when I add LLAHProcessorWrapper to other class Lets say an UIView as a member variable I get hundreds of errors like #include map Map no such a file or directory and in every..
How to create custom easing function with Core Animation? http://stackoverflow.com/questions/5161465/how-to-create-custom-easing-function-with-core-animation and decelerate in a more complex way than what is possible using the current bezier based CAMediaTimingFunction. Lets make that line any arbitrary curve movement specified with CGPath. It should still move along that curve but it should accelerate.. it should accelerate and decelerate the same way as in the line example. In theory I think it should work like this Lets describe the movement curve as a keyframe animation move t p where t is time 0..1 p is position calculated at time t . So..
Where can I find a good example of a Core Data to-many relationship? http://stackoverflow.com/questions/5399195/where-can-i-find-a-good-example-of-a-core-data-to-many-relationship a relationship defined as reciprocal automatically set the other side as well and removing works the same way. Update Lets say i've got 2 entities Person with name attribute Times with time attribute i would want to set multiple times for each..
objective c categories and inheritance http://stackoverflow.com/questions/7013090/objective-c-categories-and-inheritance
In app purchases and trial runs? http://stackoverflow.com/questions/7865658/in-app-purchases-and-trial-runs free trial of sorts plenty of complaints about it There are other examples which seem to differ from Apple's policies. Lets say you have an app that is free but then you have to pay for subscriptions to gain access however according to the rules..
How to animate View swap on simple View iPhone App? http://stackoverflow.com/questions/983598/how-to-animate-view-swap-on-simple-view-iphone-app NSAssert firstView seconView @ Whoops Are first View and Second View Wired in IB self.view addSubview firstView Lets make sure that the first view is shown secondView removeFromSuperview Lets make sure that the second View is not shown at.. Wired in IB self.view addSubview firstView Lets make sure that the first view is shown secondView removeFromSuperview Lets make sure that the second View is not shown at first Then you can wire up a button like this make sure the button is wired..
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