我正在开发应用内购买的订阅功能。
在Swift中,你可以通过SKProduct获取价格和价格所属地区,方法如下:
weeklyProduct.price.doubleValue
weeklyProduct.priceLocale.currencySymbol
其中 weeklyProduct 是一个 SKProduct。
是否可以获取免费试用的长度?例如,我为该产品指定了两周的免费试用。我能从 SKProduct 中获取吗?
我正在开发应用内购买的订阅功能。
在Swift中,你可以通过SKProduct获取价格和价格所属地区,方法如下:
weeklyProduct.price.doubleValue
weeklyProduct.priceLocale.currencySymbol
其中 weeklyProduct 是一个 SKProduct。
是否可以获取免费试用的长度?例如,我为该产品指定了两周的免费试用。我能从 SKProduct 中获取吗?
import Foundation
class PeriodFormatter {
static var componentFormatter: DateComponentsFormatter {
let formatter = DateComponentsFormatter()
formatter.maximumUnitCount = 1
formatter.unitsStyle = .full
formatter.zeroFormattingBehavior = .dropAll
return formatter
}
static func format(unit: NSCalendar.Unit, numberOfUnits: Int) -> String? {
var dateComponents = DateComponents()
dateComponents.calendar = Calendar.current
componentFormatter.allowedUnits = [unit]
switch unit {
case .day:
dateComponents.setValue(numberOfUnits, for: .day)
case .weekOfMonth:
dateComponents.setValue(numberOfUnits, for: .weekOfMonth)
case .month:
dateComponents.setValue(numberOfUnits, for: .month)
case .year:
dateComponents.setValue(numberOfUnits, for: .year)
default:
return nil
}
return componentFormatter.string(from: dateComponents)
}
}
需要将SKProduct的期限单位转换为NSCalendarUnit
import StoreKit
@available(iOS 11.2, *)
extension SKProduct.PeriodUnit {
func toCalendarUnit() -> NSCalendar.Unit {
switch self {
case .day:
return .day
case .month:
return .month
case .week:
return .weekOfMonth
case .year:
return .year
@unknown default:
debugPrint("Unknown period unit")
}
return .day
}
}
你可以在 SubscriptionPeriod 中通过以下方式调用它:
import StoreKit
@available(iOS 11.2, *)
extension SKProductSubscriptionPeriod {
func localizedPeriod() -> String? {
return PeriodFormatter.format(unit: unit.toCalendarUnit(), numberOfUnits: numberOfUnits)
}
}
然后您可以从SKProductDiscount中调用它。请注意,我现在没有实施其他的PaymentModes。
import StoreKit
@available(iOS 11.2, *)
extension SKProductDiscount {
func localizedDiscount() -> String? {
switch paymentMode {
case PaymentMode.freeTrial:
return "Free trial for \(subscriptionPeriod.localizedPeriod() ?? "a period")"
default:
return nil
}
}
}
dateComponents.calendar = Calendar.current
:let interfaceLanguage = Bundle.preferredLocalizations(from:Bundle.main.localizations).first;
let locale = Locale(identifier: interfaceLanguage ?? "en");
dateComponents.calendar = locale.calendar; - davidisdk你可以得到它,但如上所述,它只适用于iOS 11.2及以上版本,对于其他版本,您将需要通过API从您的服务器获取它。
以下是我使用过的示例代码:
if #available(iOS 11.2, *) {
if let period = prod.introductoryPrice?.subscriptionPeriod {
print("Start your \(period.numberOfUnits) \(unitName(unitRawValue: period.unit.rawValue)) free trial")
}
} else {
// Fallback on earlier versions
// Get it from your server via API
}
func unitName(unitRawValue:UInt) -> String {
switch unitRawValue {
case 0: return "days"
case 1: return "weeks"
case 2: return "months"
case 3: return "years"
default: return ""
}
}
借鉴Eslam的答案的灵感,我创建了一个扩展来处理SKProduct.PeriodUnit。
extension SKProduct.PeriodUnit {
func description(capitalizeFirstLetter: Bool = false, numberOfUnits: Int? = nil) -> String {
let period:String = {
switch self {
case .day: return "day"
case .week: return "week"
case .month: return "month"
case .year: return "year"
}
}()
var numUnits = ""
var plural = ""
if let numberOfUnits = numberOfUnits {
numUnits = "\(numberOfUnits) " // Add space for formatting
plural = numberOfUnits > 1 ? "s" : ""
}
return "\(numUnits)\(capitalizeFirstLetter ? period.capitalized : period)\(plural)"
}
}
使用方法:
if #available(iOS 11.2, *),
let period = prod?.introductoryPrice?.subscriptionPeriod
{
let desc = period.unit.description(capitalizeFirstLetter: true, numberOfUnits: period.numberOfUnits)
} else {
// Fallback
}
这将创建一个漂亮格式化的字符串(例如1天,1周,2个月,2年)
plural
变量:https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPInternational/StringsdictFileFormat/StringsdictFileFormat.html - vmeyerSKProduct.PeriodUnit
的属性而不是函数。这将使行为与枚举更加一致。"最初的回答"@available(iOS 11.2, *)
extension SKProduct.PeriodUnit {
var description: String {
switch self {
case .day: return "day"
case .week: return "week"
case .month: return "month"
case .year: return "year"
// support for future values
default:
return "N/A"
}
}
func pluralisedDescription(length: Int) -> String {
let lengthAndDescription = length.description + " " + self.description
let plural = length > 1 ? lengthAndDescription + "s" : lengthAndDescription
return plural
}
}
还需要一个函数根据description
属性返回复数形式。
如果您的应用程序可用于其他语言,则应本地化复数形式,正如其他人指出的那样。
localizedSubscriptionPeriod
是最简单的方法。import SwiftyStoreKit
product.introductoryPrice?.localizedSubscriptionPeriod // "1 week"
试用期长度不包括在SKProduct信息中,必须硬编码到应用程序中或存储在您的服务器上。目前唯一可用的获取此类信息的选项是从收据本身获取。
iOS 11.2 开始,您可以使用 SKProduct
的 introductoryPrice
属性获取有关试用的信息。
它包含 SKProductDiscount
类的实例,该类描述了所有折扣期,包括免费试用。
Swift 5
import StoreKit
extension SKProduct {
func priceString() -> String {
let period:String = {
switch self.subscriptionPeriod?.unit {
case .day: return "day"
case .week: return "week"
case .month: return "month"
case .year: return "year"
case .none: return ""
case .some(_): return ""
}
}()
let price = self.localizedPrice!
let numUnits = self.subscriptionPeriod?.numberOfUnits ?? 0
let plural = numUnits > 1 ? "s" : ""
return String(format: "%@ for %d %@%@", arguments: [price, numUnits, period, plural])
}
}
使用方法:
let price = product.priceString()
print(price)
结果:
THB 89.00 for 7 days
THB 149.00 for 1 month
+ (NSString*)localizedTitleForSKPeriod:(SKProductSubscriptionPeriod*)period{
NSDateComponents *comps = [NSDateComponents new];
NSDateComponentsFormatter *fmt = [NSDateComponentsFormatter new];
switch (period.unit) {
case SKProductPeriodUnitDay:{
fmt.allowedUnits = NSCalendarUnitDay;
comps.day = period.numberOfUnits;
}break;
case SKProductPeriodUnitWeek:{
fmt.allowedUnits = NSCalendarUnitWeekOfMonth;
comps.weekOfMonth = period.numberOfUnits;
}break;
case SKProductPeriodUnitMonth:{
fmt.allowedUnits = NSCalendarUnitMonth;
comps.month = period.numberOfUnits;
}break;
case SKProductPeriodUnitYear: {
fmt.allowedUnits = NSCalendarUnitYear;
comps.year = period.numberOfUnits;
}break;
}
// 1 Day, 1 Week, 2 Weeks, 1 Month, 2 Months, 3 Months, 6 Months, 1 Year
fmt.unitsStyle = NSDateComponentsFormatterUnitsStyleFull;
// One Day, One Week, Two Weeks, etc
//fmt.unitsStyle = NSDateComponentsFormatterUnitsStyleSpellOut;
NSString *s = [[fmt stringFromDateComponents:comps] capitalizedString];
return s;
}
Objective-C
#import "SKProduct+SKProduct.h"
-(NSString*_Nullable)localizedTrialDuraion{
if (@available(iOS 11.2, *)) {
NSDateComponentsFormatter *formatter = [[NSDateComponentsFormatter alloc] init];
[formatter setUnitsStyle:NSDateComponentsFormatterUnitsStyleFull]; //e.g 1 month
formatter.zeroFormattingBehavior = NSDateComponentsFormatterZeroFormattingBehaviorDropAll;
NSDateComponents * dateComponents = [[NSDateComponents alloc]init];
[dateComponents setCalendar:[NSCalendar currentCalendar]];
switch (self.introductoryPrice.subscriptionPeriod.unit) {
case SKProductPeriodUnitDay:{
formatter.allowedUnits = NSCalendarUnitDay;
[dateComponents setDay:self.introductoryPrice.subscriptionPeriod.numberOfUnits];
break;
}
case SKProductPeriodUnitWeek:{
formatter.allowedUnits = NSCalendarUnitWeekOfMonth;
[dateComponents setWeekOfMonth:self.introductoryPrice.subscriptionPeriod.numberOfUnits];
break;
}
case SKProductPeriodUnitMonth:{
formatter.allowedUnits = NSCalendarUnitMonth;
[dateComponents setMonth:self.introductoryPrice.subscriptionPeriod.numberOfUnits];
break;
}
case SKProductPeriodUnitYear:{
formatter.allowedUnits = NSCalendarUnitYear;
[dateComponents setYear:self.introductoryPrice.subscriptionPeriod.numberOfUnits];
break;
}
default:{
return nil;
break;
}
break;
}
[dateComponents setValue:self.introductoryPrice.subscriptionPeriod.numberOfUnits forComponent:formatter.allowedUnits];
return [formatter stringFromDateComponents:dateComponents];
} else {
// Fallback on earlier versions
}
return nil;
}