[WEEX-541][iOS]Vertical Pan may not trigger 'start' event on some devices.

神漠 · cxfeng1 · commit 988b99a7c5ca · 2018-07-26T18:05:10.000+08:00
diff --git a/ios/sdk/WeexSDK/Sources/Events/WXComponent+Events.m b/ios/sdk/WeexSDK/Sources/Events/WXComponent+Events.m
@@ -632,7 +632,7 @@ - (void)onPan:(UIPanGestureRecognizer *)gesture
         [self fireEvent:@"horizontalpan" params:@{@"state":state, @"changedTouches":resultTouch ? @[resultTouch] : @[]}];
     }
         
-    if (_listenVerticalPan && (gesture.state != UIGestureRecognizerStateBegan || fabs(translation.y) > fabs(translation.x))) {
+    if (_listenVerticalPan && (gesture.state != UIGestureRecognizerStateBegan || fabs(translation.y) >= fabs(translation.x))) {
         [self fireEvent:@"verticalpan" params:@{@"state":state, @"changedTouches":resultTouch ? @[resultTouch] : @[]}];
     }
         

Original file line number	Diff line number	Diff line change
`@@ -632,7 +632,7 @@ - (void)onPan:(UIPanGestureRecognizer *)gesture`
`632`	`632`	`[self fireEvent:@"horizontalpan" params:@{@"state":state, @"changedTouches":resultTouch ? @[resultTouch] : @[]}];`
`633`	`633`	`}`
`634`	`634`
`635`		`- if (_listenVerticalPan && (gesture.state != UIGestureRecognizerStateBegan \|\| fabs(translation.y) > fabs(translation.x))) {`
	`635`	`+ if (_listenVerticalPan && (gesture.state != UIGestureRecognizerStateBegan \|\| fabs(translation.y) >= fabs(translation.x))) {`
`636`	`636`	`[self fireEvent:@"verticalpan" params:@{@"state":state, @"changedTouches":resultTouch ? @[resultTouch] : @[]}];`
`637`	`637`	`}`
`638`	`638`