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ReactiveCocoaでのフロー制御の例
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matuyuji
July 26, 2014
Programming
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3.3k
ReactiveCocoaでのフロー制御の例
ReactiveCocoa 2.xを使ったサンプルアプリでのフロー制御例を紹介します。
matuyuji
July 26, 2014
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Transcript
3FBDUJWF$PDPB Ͱͷϑϩʔ੍ޚͷྫ @matuyuji ! ReactiveCocoaษڧձؔ 2014.7.24
!NBUVZVKJ w TBGYEFWCMPHTQPUKQ w &NBDT͍
3FBDUJWF$PDPBͬͯ ΞϓϦͭͬͯ͘Έͨ w .JP%BTICPBSE w HJUIVCDPNTBGY.JP%BTICPBSE
**+.JPΈ͓ΆΜ"1* w ߴ௨৴༻Ϋʔϙϯͷ0/0'' w Ϋʔϙϯྔɺʑͷར༻ྔ w 3&45"1* w 0"VUI +40/
Δ͜ͱ w +40/औಘ w IUUQTBQJJJKNJPKQNPCJMFEWDPVQPO w IUUQTBQJJJKNJPKQNPCJMFEWMPHQBDLFU w +40/σʔλͷϚʔδ w
0"VUIʹΑΔೝূ τʔΫϯ࠶औಘ
͍ͬͯΔ͜ͱ w +40/औಘ " IUUQTBQJJJKNJPKQNPCJMFEWDPVQPO # IUUQTBQJJJKNJPKQNPCJMFEWMPHQBDLFU w
+40/σʔλͷϚʔδ w 0"VUIʹΑΔೝূ τʔΫϯ࠶औಘ → AFNetworking-RACExtensionsͷ rac_startJSONRequestOperationWithRequest: → concat:ͰͱΓ͚͋͑ͣͬͭ͘Δɻ map:ͰMantle͔ͬͯΒϚʔδ → ΞΫηετʔΫϯΛnilʹͯ͠࠶࣮ߦ
+40/σʔλͷऔಘ (A) (B) rac_startJSONRequest…: defer defer rac_startJSONRequest…: concat: collect NSDict
NSDict NSDict × 2 NSArray → AFNetworking-RACExtensionsͷ rac_startJSONRequestOperationWithRequest:
γάφϧͰͷΠϕϯτ next completed error id NSError
"DPODBU# next completed error NSError id next id completed error
NSError
+40/σʔλͷऔಘ (A) (B) rac_startJSONRequest…: defer defer rac_startJSONRequest…: concat: collect NSDict
NSDict NSDict × 2 NSArray
+40/σʔλͷऔಘ - (RACSignal*)loadInformationSignal { RACSignal* coupon = [RACSignal defer:^RACSignal* {
return [self.restHelper getCoupon]; }]; ! RACSignal* packet = [RACSignal defer:^RACSignal* { return [self.restHelper getPacket]; }]; ! RACSignal* sig = [[coupon concat:packet] collect]; return sig; } தͰrac_startJSONRequestOperationWithRequest:ΛݺͿ
0"VUIͷೝূ - (RACSignal*)loadInformationSignal { RACSignal* coupon = [RACSignal defer:^RACSignal* {
return [self.restHelper getCoupon]; }]; ! RACSignal* packet = [RACSignal defer:^RACSignal* { return [self.restHelper getPacket]; }]; ! RACSignal* sig = [[coupon concat:packet] collect]; return self.restHelper.accessToken ? sig : [[[self.restHelper authorize] catch:self.errorBlock] concat:sig]; } complete͔error͚ͩฦ͢γάφϧ
0"VUIͷೝূ (A) (B) rac_start…: defer defer concat: collect NSDict NSDict
NSDict × 2 NSArray rac_start…: concat: authorize catch: NSArray
MPBE*OGPSNBUJPO4JHOBM (A) (B) rac_start…: defer defer concat: collect NSDict NSDict
NSDict × 2 NSArray rac_start…: concat: authorize catch: NSArray
MPBE*OGPSNBUJPO4JHOBM - (RACSignal*)loadInformationSignal { RACSignal* coupon = [RACSignal defer:^RACSignal* {
return [self.restHelper getCoupon]; }]; ! RACSignal* packet = [RACSignal defer:^RACSignal* { return [self.restHelper getPacket]; }]; ! RACSignal* sig = [[coupon concat:packet] collect]; return self.restHelper.accessToken ? sig : [[[self.restHelper authorize] catch:self.errorBlock] concat:sig]; }
ϚʔδͱτʔΫϯ࠶औಘ [[[self loadInformationSignal] catch: ^RACSignal *(NSError *error) { if (/*ΞΫηετʔΫϯ͕ແޮ*/)
{ self.restHelper.accessToken = nil; return [self loadInformationSignal]; } return [RACSignal empty]; //ଞͷΤϥʔ͖͋ΒΊΔ }] map:^(NSArray* array) { // MantleͰΦϒδΣΫτ࡞͔ͯ͠ΒɺσʔλΛ·ͱΊΔ }];
τʔΫϯ࠶औಘ (A) (B) rac_start…: defer defer concat: collect NSDict NSDict
NSDict × 2 NSArray rac_start…: concat: authorize catch: NSArray
ͬͨ͜ͱ w +40/औಘ " IUUQTBQJJJKNJPKQNPCJMFEWDPVQPO # IUUQTBQJJJKNJPKQNPCJMFEWMPHQBDLFU w
+40/σʔλͷϚʔδ w 0"VUIʹΑΔೝূ τʔΫϯ࠶औಘ → AFNetworking-RACExtensionsͷ rac_startJSONRequestOperationWithRequest: → concat:ͰͱΓ͚͋͑ͣͬͭ͘Δɻ map:ͰMantle͔ͬͯΒϚʔδ → ΞΫηετʔΫϯΛnilʹͯ͠࠶࣮ߦ
ͬͨϥΠϒϥϦ w 3FBDUJWF$PDPB w "'/FUXPSLJOH3"$&YUFOTJPOT w 6OEFSTDPSFN w .BOUMF w
58.FTTBHF#BS.BOBHFS w 75"DLOPXMFEHFNFOUT7JFX$POUSPMMFS w 9:1JF$IBSU w J041MPU
ؔ࿈ใ w 3FBDUJWF$PDPBؔ࿈ϦϯΫͷ·ͱΊ w TBGYEFWCMPHTQPUKQSFBDUJWFDPDPBIUNM