iScroll 左边方向怎么改右边方向。。

Question

javascript

Answer 1

_start: function (e) {
var that = this,
point = hasTouch ? e.touches[0] : e,
matrix, x, y; if (!that.enabled) return; if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);

if (that.options.useTransition) that._transitionTime(0); that.moved = false;
that.animating = false;
that.zoomed = false;
that.distX = 0;
that.distY = 0;
that.absDistX = 0;
that.absDistY = 0;
that.dirX = 0;
that.dirY = 0; if (that.options.momentum) {
if (that.options.useTransform) {
// Very lame general purpose alternative to CSSMatrix
matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(',');
x = matrix[4] * 1;
y = matrix[5] * 1;
} else {
x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1;
y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1;
}

if (x != that.x || y != that.y) {
if (that.options.useTransition) that._unbind('webkitTransitionEnd');
else cancelFrame(that.aniTime);
that.steps = [];
that._pos(x, y);
}
} that.startX = that.x;
that.startY = that.y;
that.pointX = point.pageX;
that.pointY = point.pageY; that.startTime = e.timeStamp || Date.now(); if (that.options.onScrollStart) that.options.onScrollStart.call(that, e); that._bind(MOVE_EV);
that._bind(END_EV);
that._bind(CANCEL_EV);
},

_move: function (e) {
var that = this,
point = hasTouch ? e.touches[0] : e,
deltaX = point.pageX - that.pointX,
deltaY = point.pageY - that.pointY,
newX = that.x + deltaX,
newY = that.y + deltaY,
timestamp = e.timeStamp || Date.now(); if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e); that.pointX = point.pageX;
that.pointY = point.pageY; // Slow down if outside of the boundaries
if (newX > 0 || newX < that.maxScrollX) {
newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
}
if (newY > 0 || newY < that.maxScrollY) { 
newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= 0 || that.maxScrollY >= 0 ? 0 : that.maxScrollY;
} that.distX += deltaX;
that.distY += deltaY;
that.absDistX = m.abs(that.distX);
that.absDistY = m.abs(that.distY); if (that.absDistX < 6 && that.absDistY < 6) {
return;
} // Lock direction
if (that.options.lockDirection) {
if (that.absDistX > that.absDistY + 5) {
newY = that.y;
deltaY = 0;
} else if (that.absDistY > that.absDistX + 5) {
newX = that.x;
deltaX = 0;
}
} that.moved = true;
that._pos(newX, newY);
that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0; if (timestamp - that.startTime > 300) {
that.startTime = timestamp;
that.startX = that.x;
that.startY = that.y;
}

if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
},

_end: function (e) {
if (hasTouch && e.touches.length != 0) return; var that = this,
point = hasTouch ? e.changedTouches[0] : e,
target, ev,
momentumX = { dist:0, time:0 },
momentumY = { dist:0, time:0 },
duration = (e.timeStamp || Date.now()) - that.startTime,
newPosX = that.x,
newPosY = that.y,
newDuration; that._unbind(MOVE_EV);
that._unbind(END_EV);
that._unbind(CANCEL_EV); if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e); if (!that.moved) {
if (hasTouch) {
// Find the last touched element
target = point.target;
while (target.nodeType != 1) target = target.parentNode; if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
ev = document.createEvent('MouseEvents');
ev.initMouseEvent('click', true, true, e.view, 1,
point.screenX, point.screenY, point.clientX, point.clientY,
e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
0, null);
ev._fake = true;
target.dispatchEvent(ev);
}
} that._resetPos(200); if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
return;
} if (duration < 300 && that.options.momentum) {
momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y : 0), that.options.bounce ? that.wrapperH : 0) : momentumY; newPosX = that.x + momentumX.dist;
newPosY = that.y + momentumY.dist;  if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };
  if ((that.y > 0 && newPosY > 0) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };
} if (momentumX.dist || momentumY.dist) {
newDuration = m.max(m.max(momentumX.time, momentumY.time), 10); that.scrollTo(mround(newPosX), mround(newPosY), newDuration); if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
return;
} that._resetPos(200);
if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
},

_resetPos: function (time) {
var that = this,
resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
resetY = that.y >= 0 || that.maxScrollY > 0 ? 0 : that.y < that.maxScrollY ? that.maxScrollY : that.y; if (resetX == that.x && resetY == that.y) {
if (that.moved) {
if (that.options.onScrollEnd) that.options.onScrollEnd.call(that); // Execute custom code on scroll end
that.moved = false;
} return;
} that.scrollTo(resetX, resetY, time || 0);
},

_mouseout: function (e) {
var t = e.relatedTarget; if (!t) {
this._end(e);
return;
} while (t = t.parentNode) if (t == this.wrapper) return;

this._end(e);
}, _transitionEnd: function (e) {
var that = this; if (e.target != that.scroller) return; that._unbind('webkitTransitionEnd');

that._startAni();
}, /**
 *
 * Utilities
 *
 */
_startAni: function () {
var that = this,
startX = that.x, startY = that.y,
startTime = Date.now(),
step, easeOut,
animate; if (that.animating) return; if (!that.steps.length) {
that._resetPos(400);
return;
} step = that.steps.shift(); if (step.x == startX && step.y == startY) step.time = 0; that.animating = true;
that.moved = true; if (that.options.useTransition) {
that._transitionTime(step.time);
that._pos(step.x, step.y);
that.animating = false;
if (step.time) that._bind('webkitTransitionEnd');
else that._resetPos(0);
return;
}

animate = function () {
var now = Date.now(),
newX, newY; if (now >= startTime + step.time) {
that._pos(step.x, step.y);
that.animating = false;
if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that); // Execute custom code on animation end
that._startAni();
return;
} now = (now - startTime) / step.time - 1;
easeOut = m.sqrt(1 - now * now);
newX = (step.x - startX) * easeOut + startX;
newY = (step.y - startY) * easeOut + startY;
that._pos(newX, newY);
if (that.animating) that.aniTime = nextFrame(animate);
};

animate();
}, _transitionTime: function (time) {
this.scroller.style[vendor + 'TransitionDuration'] = time + 'ms';
},

_momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
var deceleration = 0.0006,
speed = m.abs(dist) / time,
newDist = (speed * speed) / (2 * deceleration),
newTime = 0, outsideDist = 0; // Proportinally reduce speed if we are outside of the boundaries 
if (dist > 0 && newDist > maxDistUpper) {
outsideDist = size / (6 / (newDist / speed * deceleration));
maxDistUpper = maxDistUpper + outsideDist;
speed = speed * maxDistUpper / newDist;
newDist = maxDistUpper;
} else if (dist < 0 && newDist > maxDistLower) {
outsideDist = size / (6 / (newDist / speed * deceleration));
maxDistLower = maxDistLower + outsideDist;
speed = speed * maxDistLower / newDist;
newDist = maxDistLower;
} newDist = newDist * (dist < 0 ? -1 : 1);
newTime = speed / deceleration; return { dist: newDist, time: mround(newTime) };
}, _offset: function (el) {
var left = -el.offsetLeft,
top = -el.offsetTop;

while (el = el.offsetParent) {
left -= el.offsetLeft;
top -= el.offsetTop;
}  return { left: left, top: top };
}, _bind: function (type, el, bubble) {
(el || this.scroller).addEventListener(type, this, !!bubble);
}, _unbind: function (type, el, bubble) {
(el || this.scroller).removeEventListener(type, this, !!bubble);
},

Answer 2

/**
 *
 * Public methods
 *
 */
destroy: function () {
var that = this; that.scroller.style[vendor + 'Transform'] = ''; // Remove the event listeners
that._unbind(RESIZE_EV, window);
that._unbind(START_EV);
that._unbind(MOVE_EV);
that._unbind(END_EV);
that._unbind(CANCEL_EV);
that._unbind('mouseout', that.wrapper);
if (that.options.useTransition) that._unbind('webkitTransitionEnd');

if (that.options.onDestroy) that.options.onDestroy.call(that);
}, refresh: function () {
var that = this,
offset; that.wrapperW = that.wrapper.clientWidth;
that.wrapperH = that.wrapper.clientHeight; that.scrollerW = that.scroller.offsetWidth;
that.scrollerH = that.scroller.offsetHeight;
that.maxScrollX = that.wrapperW - that.scrollerW;
that.maxScrollY = that.wrapperH - that.scrollerH;
that.dirX = 0;
that.dirY = 0; that.hScroll = that.options.hScroll && that.maxScrollX < 0;
that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH); offset = that._offset(that.wrapper);
that.wrapperOffsetLeft = -offset.left;
that.wrapperOffsetTop = -offset.top;
that.scroller.style[vendor + 'TransitionDuration'] = '0'; that._resetPos(200);
}, scrollTo: function (x, y, time, relative) {
var that = this,
step = x,
i, l; that.stop(); if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];

for (i=0, l=step.length; i<l; i++) {
if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }
that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });
} that._startAni();
}, scrollToElement: function (el, time) {
var that = this, pos;
el = el.nodeType ? el : that.scroller.querySelector(el);
if (!el) return; pos = that._offset(el);
pos.left += that.wrapperOffsetLeft;
pos.top += that.wrapperOffsetTop; pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
pos.top = pos.top > 0 ? 0 : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time; that.scrollTo(pos.left, pos.top, time);
}, disable: function () {
this.stop();
this._resetPos(0);
this.enabled = false; // If disabled after touchstart we make sure that there are no left over events
this._unbind(MOVE_EV);
this._unbind(END_EV);
this._unbind(CANCEL_EV);
},

enable: function () {
this.enabled = true;
},

stop: function () {
cancelFrame(this.aniTime);
this.steps = [];
this.moved = false;
this.animating = false;
}
};if (typeof exports !== 'undefined') exports.iScroll = iScroll;
else window.iScroll = iScroll;})();