[iOS] Protect inner _styles, _attributes and copy them for returning values. (#2111)

wqyfavor · doumafang · commit a3111eef0854 · 2019-02-12T14:30:44.000+08:00
diff --git a/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm b/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
@@ -278,7 +278,7 @@ - (NSDictionary *)styles
 {
     NSDictionary *styles;
     pthread_mutex_lock(&_propertyMutex);
-    styles = _styles;
+    styles = [_styles copy];
     pthread_mutex_unlock(&_propertyMutex);
     return styles;
 }
@@ -287,7 +287,7 @@ - (NSDictionary *)pseudoClassStyles
 {
     NSDictionary *pseudoClassStyles;
     pthread_mutex_lock(&_propertyMutex);
-    pseudoClassStyles = _pseudoClassStyles;
+    pseudoClassStyles = [_pseudoClassStyles copy];
     pthread_mutex_unlock(&_propertyMutex);
     
     return pseudoClassStyles;
@@ -302,7 +302,7 @@ - (NSDictionary *)attributes
 {
     NSDictionary *attributes;
     pthread_mutex_lock(&_propertyMutex);
-    attributes = _attributes;
+    attributes = [_attributes copy];
     pthread_mutex_unlock(&_propertyMutex);
     
     return attributes;

Original file line number	Diff line number	Diff line change
`@@ -278,7 +278,7 @@ - (NSDictionary *)styles`
`278`	`278`	`{`
`279`	`279`	`NSDictionary *styles;`
`280`	`280`	`pthread_mutex_lock(&_propertyMutex);`
`281`		`- styles = _styles;`
	`281`	`+ styles = [_styles copy];`
`282`	`282`	`pthread_mutex_unlock(&_propertyMutex);`
`283`	`283`	`return styles;`
`284`	`284`	`}`
`@@ -287,7 +287,7 @@ - (NSDictionary *)pseudoClassStyles`
`287`	`287`	`{`
`288`	`288`	`NSDictionary *pseudoClassStyles;`
`289`	`289`	`pthread_mutex_lock(&_propertyMutex);`
`290`		`- pseudoClassStyles = _pseudoClassStyles;`
	`290`	`+ pseudoClassStyles = [_pseudoClassStyles copy];`
`291`	`291`	`pthread_mutex_unlock(&_propertyMutex);`
`292`	`292`
`293`	`293`	`return pseudoClassStyles;`
`@@ -302,7 +302,7 @@ - (NSDictionary *)attributes`
`302`	`302`	`{`
`303`	`303`	`NSDictionary *attributes;`
`304`	`304`	`pthread_mutex_lock(&_propertyMutex);`
`305`		`- attributes = _attributes;`
	`305`	`+ attributes = [_attributes copy];`
`306`	`306`	`pthread_mutex_unlock(&_propertyMutex);`
`307`	`307`
`308`	`308`	`return attributes;`