我正在使用 Titanium SDK 3.1.1 并部署到 Android 4.0 设备。我正在尝试向任何方向拖动视图，但是在触发 touchmove 事件时，出现问题并且事件被中断。只要我尝试水平拖动touchmove 事件就会起作用，如果我尝试在y轴上拖动视图，则事件会中断。应用程序不会崩溃，也不会触发 touchend 事件。在查看 logcat 时，我得到以下信息：
D/InputEventConsistencyVerifier(11897): TouchEvent: ACTION_MOVE contained 1 pointers but there are currently 0 pointers down.
D/InputEventConsistencyVerifier(11897): in android.view.ScaleGestureDetector@41223570
D/InputEventConsistencyVerifier(11897): 0: sent at 199051208557000, MotionEvent { action=ACTION_MOVE, id[0]=0, x[0]=214.55301, y[0]=163.79526, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=1, eventTime=199051208, downTime=199051042, deviceId=2, source=0x1002 }
D/InputEventConsistencyVerifier(11897): -- recent events --
D/InputEventConsistencyVerifier(11897): 1: sent at 199050732492000, MotionEvent { action=ACTION_UP, id[0]=0, x[0]=186.61124, y[0]=73.907616, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x80000000, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=199050732, downTime=199049818, deviceId=2, source=0x1002 }
D/InputEventConsistencyVerifier(11897): 2: sent at 199050713565000, MotionEvent { action=ACTION_MOVE, id[0]=0, x[0]=186.61124, y[0]=73.907616, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x80000000, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=199050713, downTime=199049818, deviceId=2, source=0x1002 }
D/InputEventConsistencyVerifier(11897): 3: sent at 199050693173000, MotionEvent { action=ACTION_MOVE, id[0]=0, x[0]=205.57172, y[0]=81.89763, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x80000000, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=199050693, downTime=199049818, deviceId=2, source=0x1002 }
D/InputEventConsistencyVerifier(11897): 4: sent at 199050683204000, MotionEvent { action=ACTION_MOVE, id[0]=0, x[0]=233.51352, y[0]=96.87891, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x80000000, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=199050683, downTime=199049818, deviceId=2, source=0x1002 }
D/InputEventConsistencyVerifier(11897): 5: sent at 199050669151000, MotionEvent { action=ACTION_MOVE, id[0]=0, x[0]=264.44907, y[0]=115.85519, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x80000000, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=199050669, downTime=199049818, deviceId=2, source=0x1002 }
我不明白为什么会发生这种情况，我之前在 Android 中使用 Titanium 做过拖放行为并且没有遇到这个问题。这是 touchstart、touchmove 和 touchend 事件的代码：
var draggedView = Titanium.UI.createView({
backgroundColor : 'transparent',
width : circleWidth + 'dp',
widthNumber : circleWidth,
height : circleWidth + 'dp',
heightNumber : circleWidth,
left : '10dp',
top : '10dp',
leftNumber : 10,
topNumber : 10,
zIndex : 4,
});
var dragView = Titanium.UI.createView({
backgroundColor : 'transparent',
opacity : 1,
width : circleWidth + 'dp',
height : circleWidth + 'dp',
widthNumber : circleWidth,
heightNumber : circleWidth,
left : '10dp',
top : '20dp',
leftNumber : 10,
topNumber : 20,
zIndex : 4
});
var targetView = Ti.UI.createImageView({
image : imagesPath + "KineduPaperPlane.png",
width : '100dp',
widthNumber : 100,
height : '100dp',
heightNumber : 100,
bottom : '-120dp',
bottomNumber : -120
});
dragView.addEventListener('touchstart', function(e) {
if (dragEnabled == true) {
curX = e.x;
curY = e.y;
}
});
dragView.addEventListener('touchmove', function(e) {
if (dragEnabled == true) {
if (targetViewDisplayed == false) {
targetView.animate({
bottom : '20dp',
duration : 200
});
targetView.bottomNumber = 20;
targetViewDisplayed = true;
}
deltaX = e.x - curX;
deltaY = e.y - curY;
currentPositionX = initialViewX + deltaX;
currentPositionY = initialViewY + deltaY;
draggedView.setLeft(currentPositionX + 'dp');
draggedView.leftNumber = currentPositionX;
draggedView.setTop(currentPositionY + 'dp');
draggedView.topNumber = currentPositionY;
}
});
function recallControl() {
var animateControlToOrigin = Ti.UI.createAnimation({
left : initialViewX,
top : initialViewY,
duration : 300,
});
animateControlToOrigin.addEventListener("complete", function(e) {
draggedView.setLeft(initialViewX + 'dp');
draggedView.leftNumber = initialViewX;
draggedView.setTop(initialViewY + 'dp');
draggedView.topNumber = initialViewY;
dragView.setLeft(initialViewX + 'dp');
dragView.leftNumber = initialViewX;
dragView.setTop(initialViewY + 'dp');
dragView.topNumber = initialViewY;
});
draggedView.animate(animateControlToOrigin);
}
dragView.addEventListener("touchend", function(e) {
if (dragEnabled == true) {
if (targetViewDisplayed == true) {
var leftLimit = true;
var rightLimit = true;
var topLimit = false;
var lowerLimit = false;
if (currentPositionY > (Ti.Platform.displayCaps.platformHeight - circleWidth - 100)) {
topLimit = true;
}
if (currentPositionY < Ti.Platform.displayCaps.platformHeight) {
lowerLimit = true;
}
if (leftLimit && rightLimit && topLimit && lowerLimit) {
var circleWidthAnimated = 20;
var animationLeft = (Ti.Platform.displayCaps.platformWidth / 2) - (circleWidth / 2);
var draggedViewAwayAnimation = Ti.UI.createAnimation({
left : animationLeft + 'dp',
height : circleWidthAnimated + 'dp',
width : circleWidthAnimated + 'dp',
borderRadius : circleWidthAnimated / 2,
opacity : 0,
duration : 400
})
draggedView.animate(draggedViewAwayAnimation);
var targetViewAwayAnimationPart2 = Ti.UI.createAnimation({
top : '10dp',
left : '-150dp',
duration : 1200,
opacity : 0,
});
draggedViewAwayAnimation.addEventListener("complete", function(e) {
targetView.animate(targetViewAwayAnimationPart1);
targetView.leftNumber = animationLeft;
targetView.heightNumber = circleWidthAnimated;
targetView.widthNumber = circleWidthAnimated;
});
var animationLeftPart1 = (Ti.Platform.displayCaps.platformWidth / 2) - circleWidthAnimated - (2) + 30;
var targetViewAwayAnimationPart1 = Ti.UI.createAnimation({
bottom : 0,
left : animationLeftPart1 + 'dp',
duration : 600,
});
targetViewAwayAnimationPart1.addEventListener("complete", function(e) {
targetView.animate(targetViewAwayAnimationPart2);
targetView.bottomNumber = 0;
targetView.leftNumber = animationLeftPart1;
});
targetViewAwayAnimationPart2.addEventListener("complete", function(e) {
dragEnabled = false;
targetView.leftNumber = -150;
targetView.top = 10;
});
} else {
targetView.animate({
bottom : '-20dp',
duration : 200
});
targetView.bottomNumber = -20;
targetViewDisplayed = false;
recallControl();
}
}
}
});
dragView 是我用来检测触摸事件的透明视图，而 draggedView 是被这些事件上检测到的更改移动的视图。targetView 是 draggedView 的最终目的地。
由于我使用 dpi 显示视图，因此我添加了一些属性，其中包含诸如 top、left、width 等属性的数值。如果有办法使用 dpi 和算术运算，我会很高兴被告知如何去做.
回到我的问题，我不明白 touchmove 事件停止的原因。该消息ACTION_MOVE contained 1 pointers but there are currently 0 pointers down给我的印象是，在我尝试垂直拖动视图时手指跟踪丢失了。
有人可以直接解决手头的问题吗？是什么导致了这种行为？感谢您提前提供任何帮助。