isWeChatInstalled on ios

ios/Classes/FluwxPlugin.h

 #import <Flutter/Flutter.h>
 #import "FluwxMethods.h"
 #import "FluwxKeys.h"
+#import "FluwxWXApiHandler.h"
+
+
 @class FluwxShareHandler;
 @class FluwxResponseHandler;
 @class FluwxAuthHandler;
+@class FluwxWXApiHandler;
 
 extern BOOL isWeChatRegistered;
 
@@ -14,6 +18,7 @@ extern BOOL isWeChatRegistered;
     FluwxShareHandler *_fluwxShareHandler;
 @private
     FluwxAuthHandler *_fluwxAuthHandler;
+@private FluwxWXApiHandler *_fluwxWXApiHandler;
 }
 
 @end

ios/Classes/FluwxPlugin.m

 #import <fluwx/FluwxPlugin.h>
 
 #import "WXApi.h"
-#import "StringUtil.h"
 #import "../../../../../../ios/Classes/handler/FluwxShareHandler.h"
-#import "ImageSchema.h"
-#import "FluwxResponseHandler.h"
+
 #import "FluwxAuthHandler.h"
+#import "FluwxWXApiHandler.h"
 
 
 @implementation FluwxPlugin
@@ -30,6 +29,7 @@ BOOL isWeChatRegistered = NO;
     if (self) {
         _fluwxShareHandler = [[FluwxShareHandler alloc] initWithRegistrar:registrar];
         _fluwxAuthHandler = [[FluwxAuthHandler alloc] initWithRegistrar:registrar];
+        _fluwxWXApiHandler = [[FluwxWXApiHandler alloc] init];
     }
 
     return self;
@@ -39,12 +39,12 @@ BOOL isWeChatRegistered = NO;
 
 
     if ([registerApp isEqualToString:call.method]) {
-        [self initWeChatIfNeeded:call result:result];
+        [_fluwxWXApiHandler registerApp:call result:result];
         return;
     }
 
-    if ([unregisterApp isEqualToString:call.method]) {
-        [self initWeChatIfNeeded:call result:result];
+    if([@"isWeChatInstalled" isEqualToString :call.method]){
+        [_fluwxWXApiHandler checkWeChatInstallation:call result:result];
         return;
     }
 
@@ -65,28 +65,6 @@ BOOL isWeChatRegistered = NO;
 }
 
 
-- (void)initWeChatIfNeeded:(FlutterMethodCall *)call result:(FlutterResult)result {
-
-    if (!call.arguments[fluwxKeyIOS]) {
-        result(@{fluwxKeyPlatform: fluwxKeyIOS, fluwxKeyResult: @NO});
-        return;
-    }
-
-    if (isWeChatRegistered) {
-        result(@{fluwxKeyPlatform: fluwxKeyIOS, fluwxKeyResult: @YES});
-        return;
-    }
-
-    NSString *appId = call.arguments[@"appId"];
-    if ([StringUtil isBlank:appId]) {
-        result([FlutterError errorWithCode:@"invalid app id" message:@"are you sure your app id is correct ? " details:appId]);
-        return;
-    }
-
-
-    isWeChatRegistered = [WXApi registerApp:appId];
-    result(@{fluwxKeyPlatform: fluwxKeyIOS, fluwxKeyResult: @(isWeChatRegistered)});
-}
 
 - (void)unregisterApp:(FlutterMethodCall *)call result:(FlutterResult)result {
 

ios/Classes/handler/FluwxAuthHandler.m

@@ -17,10 +17,11 @@
 }
 
 - (void)handleAuth:(FlutterMethodCall *)call result:(FlutterResult)result {
+    NSString *openId = call.arguments[@"openId"];
 
       [WXApiRequestHandler sendAuthRequestScope:call.arguments[@"scope"]
                                           State:call.arguments[@"state"]
-                                         OpenID:call.arguments[@"openId"]
+                                         OpenID:(openId == (id) [NSNull null]) ?nil:openId
                                               InViewController:nil];
 }
 @end
\ No newline at end of file

ios/Classes/handler/FluwxShareHandler.m

@@ -352,10 +352,10 @@ NSObject <FlutterPluginRegistrar> *_registrar;
 - (NSArray *)formatAssets:(NSString *)originPath {
     NSString *path = nil;
     NSString *packageName = @"";
-    int from = [SCHEMA_ASSETS length];
-    int to = [originPath length];
+    NSInteger from = [SCHEMA_ASSETS length];
+    NSInteger to = [originPath length];
     NSString *pathWithoutSchema = [originPath substringFromIndex:from toIndex:to];
-    int indexOfPackage = [pathWithoutSchema lastIndexOfString:fluwxKeyPackage];
+    NSInteger indexOfPackage = [pathWithoutSchema lastIndexOfString:fluwxKeyPackage];
 
     if (indexOfPackage != JavaNotFound) {
         path = [pathWithoutSchema substringFromIndex:0 toIndex:indexOfPackage];

ios/Classes/handler/FluwxWXApiHandler.h

@@ -3,6 +3,11 @@
 //
 
 #import <Foundation/Foundation.h>
+#import <Flutter/Flutter.h>
+#import "FluwxKeys.h"
 
 
-@interface FluwxWXApiHandler : NSObject @end
\ No newline at end of file
+@interface FluwxWXApiHandler : NSObject
+- (void)registerApp:(FlutterMethodCall *)call result:(FlutterResult)result;
+- (void)checkWeChatInstallation:(FlutterMethodCall *)call result:(FlutterResult)result;
+@end
\ No newline at end of file

ios/Classes/handler/FluwxWXApiHandler.m

@@ -2,10 +2,42 @@
 // Created by mo on 2018/8/23.
 //
 
+#import <WechatOpenSDK/WXApi.h>
 #import "FluwxWXApiHandler.h"
+#import "StringUtil.h"
+#import "FluwxPlugin.h"
+#import "CallResults.h"
 
 
-@implementation FluwxWXApiHandler {
+@implementation FluwxWXApiHandler
+- (void)registerApp:(FlutterMethodCall *)call result:(FlutterResult)result {
+    if (!call.arguments[fluwxKeyIOS]) {
+        result(@{fluwxKeyPlatform: fluwxKeyIOS, fluwxKeyResult: @NO});
+        return;
+    }
 
+    if (isWeChatRegistered) {
+        result(@{fluwxKeyPlatform: fluwxKeyIOS, fluwxKeyResult: @YES});
+        return;
+    }
+
+    NSString *appId = call.arguments[@"appId"];
+    if ([StringUtil isBlank:appId]) {
+        result([FlutterError errorWithCode:@"invalid app id" message:@"are you sure your app id is correct ? " details:appId]);
+        return;
+    }
+
+
+    isWeChatRegistered = [WXApi registerApp:appId];
+    result(@{fluwxKeyPlatform: fluwxKeyIOS, fluwxKeyResult: @(isWeChatRegistered)});
+}
+
+- (void)checkWeChatInstallation:(FlutterMethodCall *)call result:(FlutterResult)result {
+    if (!isWeChatRegistered) {
+        result([FlutterError errorWithCode:resultErrorNeedWeChat message:@"please config  wxapi first" details:nil]);
+        return;
+    }else{
+        result(@([WXApi isWXAppInstalled]));
+    }
 }
 @end
\ No newline at end of file