Realm Xamarin

http://kanmoba.connpass.com/event/33117/

1. Realm Xamarin USAMI Kosuke Fenrir Inc.
2. Xamarin
3. Xamarin » C# Ͱ iOS / Android ωΠςΟϒΞϓϦ։ൃ » iOS / Android ͰίʔυΛڞ༗Մೳ » .NET ϥΠϒϥϦ / ωΠςΟϒϥΠϒϥϦΛ࢖༻Մೳ
4. ݸਓ։ൃϥΠηϯεແঈԽ » Xamarin ϥΠηϯε͕ Visual Studio ϥΠηϯεͱ౷߹ » ݸਓ։ൃϥΠηϯε͕ແঈʹʢCommunity Editionʣ
5. http://www.fenrir-inc.com/jp/business/app/xamarin/
6. Xamarin Consulting Partner
7. Realm
8. Realm » ϞόΠϧΞϓϦ޲͚σʔλϕʔε » Objective-C / Swift / Java / React Native / Xamarin » ࢖͍΍͘͢ɺύϑΥʔϚϯε΋༏ल
9. Realm 1.0 » Objective-C / Swift / Java ͕ beta ͔Β 1.0 ΁ » beta Ͱͳ͘ͳͬͨ͜ͱͰɺಋೖͷෑډ͕௿͘ͳͬͨ » React Native / Xamarin ͸ beta ʢ·ͩొ৔ͨ͠͹͔Γʣ
10. Introducing Realm Xamarin on 2016/05/11
11. Realm Xamarin
12. Install » NuGet Ͱ؆୯ʹಋೖͰ͖Δ
13. Model public class Person : RealmObject { public string Name { get; set; } public int Age { get; set; } }
14. Model ͷσʔλܕ » ֤ϓϦϛςΟϒܕʢbool,char,byte,short,int,long,float,doubleʣ » string » DateTimeOffset » Null ڐ༰ܕʢint? ͳͲʣ΋Մೳɺnull ஋࢖༻Մೳ
15. getter / setter ͷࣗಈੜ੒ » ࣗಈ࣮૷ϓϩύςΟ͸ɺgetter ͱ setter ͕ࣗಈੜ੒͞ΕΔ » ͦͷதͰ Realm ಺෦ετϨʔδͱؔ࿈෇͚͞ΕΔ » Ignore ଐੑΛ͚ͭΔͱࣗಈੜ੒͞Εͳ͍ » ΧελϜ getter / setter ͸্ॻ͖͞Εͳ͍
16. ΦϒδΣΫτͷऔಘʢΫΤϦʣ public IEnumerable<Person> Persons { get; private set; } public PersonViewModel() { var realm = Realm.GetInstance(); Persons = realm.All<Person>() }
17. ΦϒδΣΫτͷ௥Ճ public AddPerson() { var realm = Realm.GetInstance(); using(var transaction = realm.BeginWrite()) { var person = realm.CreateObject<Person>(); person.Name = "Hoge"; person.Age = 20; transaction.Commit(); } // ࣗಈతʹ transaction ͕ Dispose() ͞ΕΔ }
18. ΦϒδΣΫτͷࣗಈߋ৽ ʢઌ΄ͲͷίʔυΛ࠶ܝʣ public PersonViewModel() { var realm = Realm.GetInstance(); Persons = realm.All<Person>() // ΦϒδΣΫτΛ௥Ճͨ͠ΒɺPersons ͕ࣗಈతʹߋ৽͞ΕΔ // ࠶౓ All ΫΤϦΛ࣮ߦ͢Δඞཁ͸ͳ͍ }
19. LINQ ʹΑΔΫΤϦ // ϝιουߏจ Persons = realm.All<Person>() .Where(p => p.Age < 20); // ΫΤϦࣜ Persons = from p in realm.All<Person>() where p.Age < 20 select p;
20. Realm Xamarin ·ͱΊ » ͱͯ΋؆୯ʹ࢖͑Δ » C# ͱͯࣗ͠વʹॻ͚Δ » ࢀߟࢿྉ » Realm Xamarin https://realm.io/jp/docs/xamarin/latest/ » Cross-Platform Development with Xamarin.Forms and Realm | Xamarin Blog