[iOS] Fix devtool unloading bridge manager. (#2520)

wqyfavor · jianhan-he · commit 181bca5818e2 · 2019-06-06T17:47:43.000+08:00
diff --git a/ios/sdk/WeexSDK/Sources/Manager/WXSDKManager.m b/ios/sdk/WeexSDK/Sources/Manager/WXSDKManager.m
@@ -54,7 +54,13 @@ - (instancetype)init
 
 + (WXBridgeManager *)bridgeMgr
 {
-    return [self sharedInstance].bridgeMgr;
+    WXBridgeManager* result = [self sharedInstance].bridgeMgr;
+    if (result == nil) {
+        // devtool may invoke "unload" and set bridgeMgr to nil
+        result = [[WXBridgeManager alloc] init];
+        [self sharedInstance].bridgeMgr = result;
+    }
+    return result;
 }
 
 + (id)instanceForID:(NSString *)identifier

Original file line number	Diff line number	Diff line change
`@@ -54,7 +54,13 @@ - (instancetype)init`
`54`	`54`
`55`	`55`	`+ (WXBridgeManager *)bridgeMgr`
`56`	`56`	`{`
`57`		`- return [self sharedInstance].bridgeMgr;`
	`57`	`+ WXBridgeManager* result = [self sharedInstance].bridgeMgr;`
	`58`	`+ if (result == nil) {`
	`59`	`+ // devtool may invoke "unload" and set bridgeMgr to nil`
	`60`	`+ result = [[WXBridgeManager alloc] init];`
	`61`	`+ [self sharedInstance].bridgeMgr = result;`
	`62`	`+ }`
	`63`	`+ return result;`
`58`	`64`	`}`
`59`	`65`
`60`	`66`	`+ (id)instanceForID:(NSString *)identifier`