【发布时间】:2017-03-23 03:51:57
【问题描述】:
我正在开发一个离子应用程序,尝试使用 ng-click 从我的控制器调用函数。这是我要调用的函数。
function startSpin()
{
if ($scope.wheelSpinning == false)
{
spinWheel.animation.spins = 9;
spinWheel.startAnimation();
$scope.wheelSpinning = true;
}
}
function resetWheel()
{
spinWheel.stopAnimation(false);
spinWheel.rotationAngle = 0;
spinWheel.draw();
$scope.wheelSpinning = false;
$scope.$apply();
}
我在这里尝试做的就像是命运之轮游戏,我正在使用来自此来源http://dougtesting.net 的 winWheel.js 库。在我看来,我想从一个按钮调用 startSpin() 和 resetWheel() 函数。这是我的代码。
<canvas id="canvas" width="300px" height="315px" style="margin: 25px">
Canvas not supported
</canvas>
<button onClick="spinWheel.startSpin()">Spin the Wheel</button>
<a href="javascript:void(0);" onClick="spinwheel.resetWheel();">Reset</a>
当我单击旋转按钮时,它会在控制台上返回
Uncaught ReferenceError: spinWheel is not defined
当我使用 ng-click 指令时,它没有任何效果,几乎不会像禁用按钮一样向控制台输出任何内容。我不知道我在这里做错了什么,需要一些帮助,非常感谢,如果需要更多信息,我很乐意在这里粘贴。感谢您的帮助。
请注意,这只是我控制器中代码的一部分。
这是控制器的完整代码
.controller('PlayCtrl', ["$scope", "$ionicPopup", function($scope, $ionicPopup) {
// Create new wheel object specifying the parameters at creation time.
var spinWheel = new Winwheel({
'numSegments' : 6, // Specify number of segments.
'outerRadius' : 138, // Set outer radius so wheel fits inside the background.
'lineWidth' : 2,
'segments' : // Define segments including colour and text.
[
{'fillStyle' : '#eae56f', 'text' : 'Segment 1'},
{'fillStyle' : '#89f26e', 'text' : 'Segment 2'},
{'fillStyle' : '#7de6ef', 'text' : 'Segment 3'},
{'fillStyle' : '#e7706f', 'text' : 'Segment 4'},
{'fillStyle' : '#0D56A6', 'text' : 'Segment 5'},
{'fillStyle' : '#29c932', 'text' : 'Segment 6'}
],
'animation' : // Specify the animation to use.
{
'type' : 'spinToStop',
'duration' : 5, // Duration in seconds.
'spins' : 10, // Number of complete spins.
// 'callbackFinished' : 'alertPrize()' // Alert to show prize won
}
});
$scope.wheelSpinning = false;
//Click handler for spin button.
function startSpin()
{
// Ensure that spinning can't be clicked again while already running.
if ($scope.wheelSpinning == false)
{
spinWheel.animation.spins = 9;
// Begin the spin animation by calling startAnimation on the wheel object.
spinWheel.startAnimation();
// Set to true so that power can't be changed and spin button re-enabled during
// the current animation. The user will have to reset before spinning again.
$scope.wheelSpinning = true;
}
}
// Function for the reset button.
function resetWheel()
{
spinWheel.stopAnimation(false); // Stop the animation, false as parameter so does not call callback function.
spinWheel.rotationAngle = 0; // Reset to false to power buttons and spin can be clicked again.
spinWheel.draw(); // Call draw to render changes to the wheel.
$scope.wheelSpinning = false; // Reset to false so spin can be clicked again.
$scope.$apply();
}
// Called when the spin animation has finished by the callback feature of the wheel
alertPrize = function()
{
// Get the segment indicated by the pointer on the wheel background which is at 0 degrees.
var winningSegment = spinWheel.getIndicatedSegment();
// Alert of selected segment text.
$ionicPopup.alert({
title: 'Success',
content: "You have won " + winningSegment.text + "!"
});
}
$scope.spinWheel = startSpin();
}]);
【问题讨论】:
-
spinWheel is not defined不言自明... -
发布你的控制器的完整代码
-
使用来自控制器@RishiTiwari 的代码更新
标签: javascript angularjs ionic-framework angularjs-scope html5-canvas