* [ios] fix bug that setFrame incorrectly when transform has been set

From the UIView's frame documentation:
https://developer.apple.com/reference/uikit/uiview#//apple_ref/occ/instp/UIView/frame
Warning : If the transform property is not the identity transform, the value of this property is undefined and therefore should be ignored.
So layer's transform must be reset to CATransform3DIdentity before setFrame, otherwise frame will be incorrect

ios/sdk/WeexSDK/Sources/Layout/WXComponent+Layout.m

@@ -105,13 +105,24 @@ - (void)_frameDidCalculated:(BOOL)isChanged
 
     if ([self isViewLoaded] && isChanged && [self isViewFrameSyncWithCalculated]) {
 
+        __weak typeof(self) weakSelf = self;
         [self.weexInstance.componentManager _addUITask:^{
-            self.view.frame = _calculatedFrame;
-            if (_transform) {
-                _layer.transform = [[WXTransform new] getTransform:_transform withView:_view withOrigin:_transformOrigin];
+            __strong typeof(weakSelf) strongSelf = weakSelf;
+            if (strongSelf->_transform && !CATransform3DEqualToTransform(strongSelf.layer.transform, CATransform3DIdentity)) {
+                // From the UIView's frame documentation:
+                // https://developer.apple.com/reference/uikit/uiview#//apple_ref/occ/instp/UIView/frame
+                // Warning : If the transform property is not the identity transform, the value of this property is undefined and therefore should be ignored.
+                // So layer's transform must be reset to CATransform3DIdentity before setFrame, otherwise frame will be incorrect
+                strongSelf.layer.transform = CATransform3DIdentity;
             }
 
-            [self setNeedsDisplay];
+            strongSelf.view.frame = strongSelf.calculatedFrame;
+
+            if (strongSelf->_transform) {
+                strongSelf.layer.transform = [[WXTransform new] getTransform:strongSelf->_transform withView:strongSelf.view withOrigin:strongSelf->_transformOrigin];
+            }
+
+            [strongSelf setNeedsDisplay];
         }];
     }
 }