修复RCTMJScrollView 有时会Crash问题

Rain · Rain · commit f126d5510948 · 2018-08-22T17:23:15.000+08:00
diff --git a/ios/RCTMJRefreshHeader/RCTMJRefreshHeader/RCTMJScrollView.m b/ios/RCTMJRefreshHeader/RCTMJRefreshHeader/RCTMJScrollView.m
@@ -505,7 +505,9 @@ - (void)setClipsToBounds:(BOOL)clipsToBounds
 - (void)dealloc
 {
     _scrollView.delegate = nil;
-    [_eventDispatcher.bridge.uiManager.observerCoordinator removeObserver:self];
+    if (_maintainVisibleContentPosition != nil) {
+        [_eventDispatcher.bridge.uiManager.observerCoordinator removeObserver:self];
+    }
 }
 
 - (void)layoutSubviews

Original file line number	Diff line number	Diff line change
`@@ -505,7 +505,9 @@ - (void)setClipsToBounds:(BOOL)clipsToBounds`
`505`	`505`	`- (void)dealloc`
`506`	`506`	`{`
`507`	`507`	`_scrollView.delegate = nil;`
`508`		`- [_eventDispatcher.bridge.uiManager.observerCoordinator removeObserver:self];`
	`508`	`+ if (_maintainVisibleContentPosition != nil) {`
	`509`	`+ [_eventDispatcher.bridge.uiManager.observerCoordinator removeObserver:self];`
	`510`	`+ }`
`509`	`511`	`}`
`510`	`512`
`511`	`513`	`- (void)layoutSubviews`