[iOS] Fix custom component receive touch events when root componet ha…

…s click event.

* bugfix: If a root component has click event, the custom component inside can't receive touch events.

ios/sdk/WeexSDK/Sources/Component/WXComponent_internal.h

@@ -90,6 +90,8 @@ typedef id (^WXDataBindingBlock)(NSDictionary *data, BOOL *needUpdate);
     UILongPressGestureRecognizer *_longPressGesture;
     UIPanGestureRecognizer *_panGesture;
 
+    BOOL _cancelsTouchesInView;
+
     BOOL _listenPanStart;
     BOOL _listenPanMove;
     BOOL _listenPanEnd;

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

@@ -388,6 +388,7 @@ - (void)addClickEvent
     if (!_tapGesture) {
         _tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onClick:)];
         _tapGesture.delegate = self;
+        _tapGesture.cancelsTouchesInView = _cancelsTouchesInView;
         [self.view addGestureRecognizer:_tapGesture];
     }
 }

ios/sdk/WeexSDK/Sources/Model/WXComponent.mm

@@ -100,6 +100,7 @@ - (instancetype)initWithRef:(NSString *)ref
         _ariaHidden = nil;
         _accessible = nil;
         _accessibilityHintContent = nil;
+        _cancelsTouchesInView = YES;
 
         _async = NO;
 
@@ -152,6 +153,11 @@ - (instancetype)initWithRef:(NSString *)ref
             _customEvent = [WXConvert BOOL:attributes[@"customEvent"]];
         }
 
+        if (attributes[@"cancelsTouchesInView"]) {
+            _cancelsTouchesInView = [WXConvert BOOL:attributes[@"cancelsTouchesInView"]];
+        }
+
+
 #ifdef DEBUG
         WXLogDebug(@"flexLayout -> init component: ref : %@ , styles: %@",ref,styles);
         WXLogDebug(@"flexLayout -> init component: ref : %@ , attributes: %@",ref,attributes);