Add _Nonnull or _Nullable

Author: 須藤将史

Demo/StudyplusSDKDemo/StudyplusSDK/SPLStudyplus.h

@@ -25,6 +25,8 @@
 #import "SPLStudyplusRecordAmount.h"
 #import "SPLStopwatch.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 /**
  The class for using Studyplus.<br>
  For example, you can authenticate in Studyplus account, de-authentication, and post study record.
@@ -67,7 +69,7 @@
 /**
  @see SPLStudyplusDelegate protocol
  */
-@property (nonatomic, weak) id<SPLStudyplusDelegate> delegate;
+@property (nonatomic, weak, nullable) id<SPLStudyplusDelegate> delegate;
 
 /**
  When set to YES, if Studyplus is not installed, AppStore application starts when auth/login methods are called. Default value is YES.<br>
@@ -79,18 +81,18 @@
  Username of Studyplus account. It is set when the auth or login is successful. Default value is nil.<br>
  Studyplusアカウントのユーザ名です。login または authが成功したとき設定されます。設定されるまではnilです。
  */
-@property (nonatomic, copy, readonly) NSString *username;
+@property (nonatomic, copy, readonly, nullable) NSString *username;
 
 /**
  Access token of Studyplus API. It is set when the auth or login is successful. Default value is nil.<br>
  StudyplusAPIのアクセストークンです。login または authが成功したとき設定されます。設定されるまではnilです。
  */
-@property (nonatomic, copy, readonly) NSString *accessToken;
+@property (nonatomic, copy, readonly, nullable) NSString *accessToken;
 
 /**
  @see SPLStopwatch class
  */
-@property (nonatomic, readonly) SPLStopwatch *stopwatch;
+@property (nonatomic, readonly, nullable) SPLStopwatch *stopwatch;
 
 /**
  The convenience constructor of SPLStudyplus class.
@@ -182,4 +184,6 @@
  */
 - (BOOL)openURL:(NSURL*)url;
 
+NS_ASSUME_NONNULL_END
+
 @end

Demo/StudyplusSDKDemo/StudyplusSDK/SPLStudyplusAPIRequest.h

@@ -22,14 +22,18 @@
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface SPLStudyplusAPIRequest : NSObject
 
 + (SPLStudyplusAPIRequest*)newRequestWithAccessToken:(NSString*)accessToken
                                              options:(NSDictionary*)options;
 
 - (void)postRequestWithPath:(NSString *)path
            requestParameter:(NSDictionary *)requestParameter
-                  completed:(void(^)(NSDictionary *response))completed
+                  completed:(void(^)(NSDictionary * _Nullable response))completed
                      failed:(void(^)(NSError *error))failed;
 
+NS_ASSUME_NONNULL_END
+
 @end

Demo/StudyplusSDKDemo/StudyplusSDK/SPLStudyplusRecord.h

@@ -22,6 +22,8 @@
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 @class SPLStudyplusRecordAmount;
 
 /**
@@ -54,7 +56,7 @@
  The comment of learning.<br>
  勉強に関するコメントです。
  */
-@property (nonatomic, readonly) NSString *comment;
+@property (nonatomic, readonly, nullable) NSString *comment;
 
 /**
  Creates and returns StudyplusRecord object that has number of seconds, no amount, and empty comment.<br>
@@ -87,11 +89,13 @@
  
  @result StudyplusRecord object.
  */
-+ (SPLStudyplusRecord*)recordWithDuration:(NSTimeInterval)duration options:(NSDictionary*)options;
++ (SPLStudyplusRecord*)recordWithDuration:(NSTimeInterval)duration options:(NSDictionary* _Nullable)options;
 
 /**
  @result Returns the parameters of the study record for posting API
  */
 - (NSDictionary*)toRequestParam;
 
+NS_ASSUME_NONNULL_END
+
 @end

Demo/StudyplusSDKDemo/StudyplusSDK/SPLStudyplusRecordAmount.h

@@ -22,6 +22,8 @@
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 /**
  The class that represents the amount of learning. <br>
  学習量を表すクラスです。
@@ -59,4 +61,6 @@
  */
 - (NSDictionary*)toRequestParameter;
 
+NS_ASSUME_NONNULL_END
+
 @end