# š¤ General Discussion
**URL:** https://forums.kodeco.com/c/general/16.md?page=104
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**Page:** 105
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## [String to Double?](https://forums.kodeco.com/t/string-to-double/13288)
**Author:** [@hcri50](https://forums.kodeco.com/u/hcri50)\
**Replies:** 3\
**Last updated:** [April 14, 2016, 6:21pm UTC](https://forums.kodeco.com/t/string-to-double/13288 "2016-04-14T18:21:41Z")
let testField: String = ā2.25ā if let cost = Double(textField.text!) { print("The user entered a value price of \\(cost)") } else { print("Not a valid number: \\(textField.text!)"ā¦
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## [FMDB Transaction doubt](https://forums.kodeco.com/t/fmdb-transaction-doubt/13368)
**Author:** [@krbaswe](https://forums.kodeco.com/u/krbaswe)\
**Replies:** 0\
**Last updated:** [April 14, 2016, 10:38am UTC](https://forums.kodeco.com/t/fmdb-transaction-doubt/13368 "2016-04-14T10:38:21Z")
I want to insert bulk rows in FMDB and I am doing this in transaction as below. Can someone plz check and confirm whether I am doing correctly? My doubt is whether to put the loop inside transaction or as it is nowā¦ Isā¦
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## [Background Fetch](https://forums.kodeco.com/t/background-fetch/13193)
**Author:** [@rehankadir](https://forums.kodeco.com/u/rehankadir)\
**Replies:** 2\
**Last updated:** [April 14, 2016, 7:54am UTC](https://forums.kodeco.com/t/background-fetch/13193 "2016-04-14T07:54:44Z")
Hello! Iām having trouble using background fetch on swift 2.0 according to the tutorial ā https://www.raywenderlich.com/92428/background-modes-ios-swift-tutorial. I get this error: application:performFetchWithCompletiā¦
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## [Reverse an animation at any point during the animation loop](https://forums.kodeco.com/t/reverse-an-animation-at-any-point-during-the-animation-loop/11332)
**Author:** [@sir\_walter](https://forums.kodeco.com/u/sir_walter)\
**Replies:** 1\
**Last updated:** [April 14, 2016, 3:10am UTC](https://forums.kodeco.com/t/reverse-an-animation-at-any-point-during-the-animation-loop/11332 "2016-04-14T03:10:10Z")
Iām currently animating a SKSpriteNode the more ātraditional wayā: let atlas = SKTextureAtlas (named: "drone") var array = \[String\]() for var i=1; i \<= 109; i++ { let nameString = String(format: "drone%i", i) ā¦
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## [Audio Compression](https://forums.kodeco.com/t/audio-compression/11649)
**Author:** [@perrbear](https://forums.kodeco.com/u/perrbear)\
**Replies:** 1\
**Last updated:** [April 14, 2016, 3:05am UTC](https://forums.kodeco.com/t/audio-compression/11649 "2016-04-14T03:05:54Z")
I am creating a game that uses a lot of sound bites (15M of mp3). Apple best practices talk about compressed formats. If I use āafconvert -f AIFC -d ima4 sound.wavā to compress any of the files, I get one almost four timā¦
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## [Combine two tutorials / Chat&Timer / Match two Users randomly](https://forums.kodeco.com/t/combine-two-tutorials-chat-timer-match-two-users-randomly/13277)
**Author:** [@appswithheart](https://forums.kodeco.com/u/appswithheart)\
**Replies:** 1\
**Last updated:** [April 14, 2016, 1:37am UTC](https://forums.kodeco.com/t/combine-two-tutorials-chat-timer-match-two-users-randomly/13277 "2016-04-14T01:37:16Z")
Hey everyone, iām really happy that i found this awesome website. I followed most of the tutorials here and tried to mix them up to get an app that does the following: Secretly User Authentication Open Chat via JSQMesā¦
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## [Opinions on tracking IAP subscription expiry dates](https://forums.kodeco.com/t/opinions-on-tracking-iap-subscription-expiry-dates/10802)
**Author:** [@ste23](https://forums.kodeco.com/u/ste23)\
**Replies:** 3\
**Last updated:** [April 14, 2016, 12:52am UTC](https://forums.kodeco.com/t/opinions-on-tracking-iap-subscription-expiry-dates/10802 "2016-04-14T00:52:28Z")
Iām finalising quite a simple app that carries out calculations and projections of sales volume. I plan to allow āunlimited useā of the app for Ā£0.99 a month. The free version will allow a user to carry out 3 calculatiā¦
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## [Loading Screen (Not the Splash Screen)](https://forums.kodeco.com/t/loading-screen-not-the-splash-screen/11384)
**Author:** [@sir\_walter](https://forums.kodeco.com/u/sir_walter)\
**Replies:** 2\
**Last updated:** [April 13, 2016, 3:03am UTC](https://forums.kodeco.com/t/loading-screen-not-the-splash-screen/11384 "2016-04-13T03:03:46Z")
How do you know when to use a loading screen before the game starts? How do you know when you have so many assets that a loading screen is necessary? Do you put it in the scene file? or somewhere else? Thanks for the heā¦
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## [Hi Ho Silver ... Swift on Windows](https://forums.kodeco.com/t/hi-ho-silver-swift-on-windows/13279)
**Author:** [@graeme](https://forums.kodeco.com/u/graeme)\
**Replies:** 0\
**Last updated:** [April 12, 2016, 10:48pm UTC](https://forums.kodeco.com/t/hi-ho-silver-swift-on-windows/13279 "2016-04-12T22:48:50Z")
Swift programmers, of course, can do business on Windows using the free distribution of āswiftā packaged as āSilverā. Again, as with Linux, there are a few tricks. Install the community edition of Visual Studio 2015 befā¦
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## [Localize hosted content In App Purchase \[iOS 6 by Tutorials\]](https://forums.kodeco.com/t/localize-hosted-content-in-app-purchase-ios-6-by-tutorials/13238)
**Author:** [@coopersita](https://forums.kodeco.com/u/coopersita)\
**Replies:** 0\
**Last updated:** [April 12, 2016, 5:16pm UTC](https://forums.kodeco.com/t/localize-hosted-content-in-app-purchase-ios-6-by-tutorials/13238 "2016-04-12T17:16:39Z")
Iāve successfully implemented the chapter on hosted content for in-app purchases, but Iām having some questions about how to localize the content. I found it easy enough to click on the āLocalizeā button in Xcode to locā¦
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## [Android ProgressDialog in Swift](https://forums.kodeco.com/t/android-progressdialog-in-swift/12875)
**Author:** [@krbaswe](https://forums.kodeco.com/u/krbaswe)\
**Replies:** 2\
**Last updated:** [April 11, 2016, 8:53pm UTC](https://forums.kodeco.com/t/android-progressdialog-in-swift/12875 "2016-04-11T20:53:26Z")
Need help in implementing Android like ProgressDialog Animation + Message Should not allow to tap background making it dimmer.
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## [Production Code](https://forums.kodeco.com/t/production-code/12188)
**Author:** [@graeme](https://forums.kodeco.com/u/graeme)\
**Replies:** 2\
**Last updated:** [April 11, 2016, 2:24pm UTC](https://forums.kodeco.com/t/production-code/12188 "2016-04-11T14:24:36Z")
Production Code in Swift? I would like to see some industrial, production code, in Swift, and, preferably, done outside XCode. I avoid IDE development until I am very comfortable with the language. Sometimes the IDE suā¦
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## [Build Swift on Linux? Not just yet](https://forums.kodeco.com/t/build-swift-on-linux-not-just-yet/13089)
**Author:** [@graeme](https://forums.kodeco.com/u/graeme)\
**Replies:** 0\
**Last updated:** [April 11, 2016, 2:43am UTC](https://forums.kodeco.com/t/build-swift-on-linux-not-just-yet/13089 "2016-04-11T02:43:21Z")
I have carefully followed a number of āhelpfulā sets of instructions for building swift programs on Linux, and failed. Again and again. Now, I have trawled the Swift.org site, and concluded two things: 1 Several of theā¦
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## [Design implementation for a RESTful JSON parser](https://forums.kodeco.com/t/design-implementation-for-a-restful-json-parser/13063)
**Author:** [@jonny](https://forums.kodeco.com/u/jonny)\
**Replies:** 1\
**Last updated:** [April 10, 2016, 10:35pm UTC](https://forums.kodeco.com/t/design-implementation-for-a-restful-json-parser/13063 "2016-04-10T22:35:08Z")
Hi Similar to my other question, Iām working at building essentially a web service to display data from my own JSON API. I feel that is a decent complexity to start of with learning swift and the iOS development. Iāve mā¦
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## [Making login system](https://forums.kodeco.com/t/making-login-system/13033)
**Author:** [@bikashmainali](https://forums.kodeco.com/u/bikashmainali)\
**Replies:** 1\
**Last updated:** [April 10, 2016, 10:07pm UTC](https://forums.kodeco.com/t/making-login-system/13033 "2016-04-10T22:07:03Z")
how can we create a login system that can actually login to actual website that is not owned by us. We want to get username and password from the user and try to login to the website like github. and be able to show all ā¦
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## [FMDB Transaction](https://forums.kodeco.com/t/fmdb-transaction/12880)
**Author:** [@krbaswe](https://forums.kodeco.com/u/krbaswe)\
**Replies:** 0\
**Last updated:** [April 8, 2016, 7:37pm UTC](https://forums.kodeco.com/t/fmdb-transaction/12880 "2016-04-08T19:37:20Z")
How to call FMDB Transaction in Swift?
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## [Connect UITextView in Nib to ViewController](https://forums.kodeco.com/t/connect-uitextview-in-nib-to-viewcontroller/12002)
**Author:** [@clairesoem](https://forums.kodeco.com/u/clairesoem)\
**Replies:** 2\
**Last updated:** [April 7, 2016, 5:39am UTC](https://forums.kodeco.com/t/connect-uitextview-in-nib-to-viewcontroller/12002 "2016-04-07T05:39:30Z")
Iām trying to connect a UITextView in a Nib to the ViewController - itās displayed as part of a UITableViewCell. I canāt work out how I can pass the text inserted by the user to the ViewController when a button is pressā¦
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## [Adding MKPolyline](https://forums.kodeco.com/t/adding-mkpolyline/12616)
**Author:** [@jdlace](https://forums.kodeco.com/u/jdlace)\
**Replies:** 0\
**Last updated:** [April 6, 2016, 9:22pm UTC](https://forums.kodeco.com/t/adding-mkpolyline/12616 "2016-04-06T21:22:55Z")
Iām having some trouble adding an MKPolyline to my mapView. Iām trying to add a simply overlay of a blue line that traces changes in the current location. Here is the code: //CLLocationManagerDelegate methods func locaā¦
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## [FMDB WHERE clause](https://forums.kodeco.com/t/fmdb-where-clause/12518)
**Author:** [@krbaswe](https://forums.kodeco.com/u/krbaswe)\
**Replies:** 0\
**Last updated:** [April 6, 2016, 11:28am UTC](https://forums.kodeco.com/t/fmdb-where-clause/12518 "2016-04-06T11:28:09Z")
Hi Could not retrieve row with WHERE but I can retrieve all rows. Plz check code. func retrieveData() { let contactDB = FMDatabase(path: databasePath as String) if contactDB.open() { ā¦
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## [Help with reconnecting my prototype cells](https://forums.kodeco.com/t/help-with-reconnecting-my-prototype-cells/12283)
**Author:** [@jonny](https://forums.kodeco.com/u/jonny)\
**Replies:** 1\
**Last updated:** [April 5, 2016, 9:56pm UTC](https://forums.kodeco.com/t/help-with-reconnecting-my-prototype-cells/12283 "2016-04-05T21:56:13Z")
Hi I have recently restarted learning iOS and I built a little demo tab bar app using some of the tutorials here. I then realized Iād forgot to include core data as it isnāt an option for tabbed apps. So I started from ā¦
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## [NSDate Need help please](https://forums.kodeco.com/t/nsdate-need-help-please/12278)
**Author:** [@hcri50](https://forums.kodeco.com/u/hcri50)\
**Replies:** 1\
**Last updated:** [April 5, 2016, 6:59pm UTC](https://forums.kodeco.com/t/nsdate-need-help-please/12278 "2016-04-05T18:59:39Z")
MyPlayground I have uploaded my PlayGround to see why my var startDate: NSDate? var startDateFromString: String? startDateFromString = ā2016-04-12 17:42:10 +0000ā print(startDateFromString) var formatter = NSDateFā¦
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## [Swift PDF search and markup tutorial](https://forums.kodeco.com/t/swift-pdf-search-and-markup-tutorial/9965)
**Author:** [@tanner3068](https://forums.kodeco.com/u/tanner3068)\
**Replies:** 2\
**Last updated:** [April 5, 2016, 12:02am UTC](https://forums.kodeco.com/t/swift-pdf-search-and-markup-tutorial/9965 "2016-04-05T00:02:41Z")
Is there any tutorials or help on the site for applications that display PDFs along with search and markup, and page numbering etc etc. I have not found any in my searches. I have found plenty of support online for Objeā¦
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## [Insert Bulk json to core data](https://forums.kodeco.com/t/insert-bulk-json-to-core-data/12087)
**Author:** [@krbaswe](https://forums.kodeco.com/u/krbaswe)\
**Replies:** 2\
**Last updated:** [April 4, 2016, 3:09pm UTC](https://forums.kodeco.com/t/insert-bulk-json-to-core-data/12087 "2016-04-04T15:09:02Z")
Need help in inserting 10000 json records to core data in swift.
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## [Mac Os screen-saver](https://forums.kodeco.com/t/mac-os-screen-saver/12027)
**Author:** [@cajunesque](https://forums.kodeco.com/u/cajunesque)\
**Replies:** 1\
**Last updated:** [April 4, 2016, 2:22pm UTC](https://forums.kodeco.com/t/mac-os-screen-saver/12027 "2016-04-04T14:22:36Z")
Been reading about Cocos2d and SpriteKit on here to get the requisite knowledge to write a screen saver. Which of these two libraries (or perhaps another) is the best way to go for a boucing ball (i.e. bouncing around ofā¦
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## [Accepting payments](https://forums.kodeco.com/t/accepting-payments/12029)
**Author:** [@marcosoul](https://forums.kodeco.com/u/marcosoul)\
**Replies:** 1\
**Last updated:** [April 4, 2016, 9:42am UTC](https://forums.kodeco.com/t/accepting-payments/12029 "2016-04-04T09:42:41Z")
I am writing an iOS app to mimic the functionality that I already have on my website. The website does not sell products. Instead, it sells services that are consumed over the phone or chat in realtime. In order to purchā¦
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## [Can not read NSDate from Core Data](https://forums.kodeco.com/t/can-not-read-nsdate-from-core-data/12007)
**Author:** [@hcri50](https://forums.kodeco.com/u/hcri50)\
**Replies:** 1\
**Last updated:** [April 3, 2016, 9:16pm UTC](https://forums.kodeco.com/t/can-not-read-nsdate-from-core-data/12007 "2016-04-03T21:16:09Z")
Xcode here I am able to safe my NSDate to SQLite but when I to call it up, it is nil. My two other variables are being able to be displayed with no problem. But for some reason, I can not display my NSDate. Can someonā¦
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## [Chain of animation of different layers](https://forums.kodeco.com/t/chain-of-animation-of-different-layers/10926)
**Author:** [@rufy](https://forums.kodeco.com/u/rufy)\
**Replies:** 3\
**Last updated:** [April 2, 2016, 1:37pm UTC](https://forums.kodeco.com/t/chain-of-animation-of-different-layers/10926 "2016-04-02T13:37:15Z")
Hi everyone, Iām trying to pars an SVG file that represent an Kanji (japanese ideogram) using the framework SVGKit. parsing the file Iām able to get path and create for each path an CAShapeLayer. Iām able to animate thā¦
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## ["Show" segue not sliding in from right side (only from bottom)](https://forums.kodeco.com/t/show-segue-not-sliding-in-from-right-side-only-from-bottom/10718)
**Author:** [@frankieshakes](https://forums.kodeco.com/u/frankieshakes)\
**Replies:** 2\
**Last updated:** [April 1, 2016, 7:55pm UTC](https://forums.kodeco.com/t/show-segue-not-sliding-in-from-right-side-only-from-bottom/10718 "2016-04-01T19:55:19Z")
Hi there, Iām a bit stumped with an issue Iām having and am wondering if anybody could chime in with some possible workarounds/fixes. Iāve got an application thatās set up using Storyboards. Iām running into a problem ā¦
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## [Watch Connectivity - how to handle existing todo app?](https://forums.kodeco.com/t/watch-connectivity-how-to-handle-existing-todo-app/11757)
**Author:** [@destroplayer](https://forums.kodeco.com/u/destroplayer)\
**Replies:** 0\
**Last updated:** [April 1, 2016, 4:42pm UTC](https://forums.kodeco.com/t/watch-connectivity-how-to-handle-existing-todo-app/11757 "2016-04-01T16:42:58Z")
Hi, itās first topic in watchOS forum! :smiley: I should be rewarded :wink: Back to the question. I have existing todo app on my iPhone. Now I want to create watchOS 2 app to extend it. I want to allow user to check orā¦
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## [Losing Hair - UIBarButton won't work after dismissing ViewController](https://forums.kodeco.com/t/losing-hair-uibarbutton-wont-work-after-dismissing-viewcontroller/11446)
**Author:** [@emanleet](https://forums.kodeco.com/u/emanleet)\
**Replies:** 4\
**Last updated:** [April 1, 2016, 8:29am UTC](https://forums.kodeco.com/t/losing-hair-uibarbutton-wont-work-after-dismissing-viewcontroller/11446 "2016-04-01T08:29:28Z")
So if the image picker appears and I cancel, everything is fine. However, when I choose an image, and the image picker view dismisses, I canāt select the āpickā button again, it wonāt work or print anything to the consolā¦
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