AliyunVideoLicenseManager
@interface AliyunVideoLicenseManager : NSObject短视频证书管理类
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                  当前是否已经初始化成功 DeclarationObjective-C @property (class, nonatomic, readonly) BOOL HasInitialized;
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                  当前的证书信息 DeclarationObjective-C @property (class, nonatomic, readonly) AliyunVideoLicense *CurrentLicense;
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                  短视频证书相关事件通知 DeclarationObjective-C @property (class, nonatomic) id<AliyunVideoLicenseEventDelegate> EventDelegate;
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                  初始化 请在工程的Info.plist中增加AlivcLicenseKey和AlivcLicenseFile字段 - 在AlivcLicenseKey中填入您的LicenseKey
- 在AlivcLicenseFile中填入您的LicenseFile路径(相对于mainBundle);例如您的LicenseFile为"license.crt"放到mainBundle下,就填入license.crt
 LicenseKey和LicenseFile的获取请参考文档:https://help.aliyun.com/document_detail/274386.html DeclarationObjective-C + (NSError *)Setup;
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                  更新证书 DeclarationObjective-C + (void)Refresh:(void (^)(AliyunVideoLicenseRefreshCode))callback;Parameterscallback更新完成回调 
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                  验证证书 Check the license DeclarationObjective-C + (AliyunVideoLicenseResultCode)Check;Return Valuethe result code of license check 
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                  检查配置,可以帮助您检查license相关配置是否正确 DeclarationObjective-C + (void)CheckSetting:(void (^)(NSError *))callback;Parameterscallback检查完成回调 
 AliyunVideoLicenseManager Class Reference
        AliyunVideoLicenseManager Class Reference