angular 报错笔记

1、错误信息：

Failed to instantiate module app due to:
Error: [$injector:unpr] http://errors.angularjs.org/1.5.8/$injector/unpr?p0=showE...
    at http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:6:412
    at http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:43:174
    at d (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:40:432)
    at e (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:41:158)
    at Object.invoke (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:41:243)
    at d (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:39:418)
    at http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:40:19
    at q (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:7:355)
    at g (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:39:319)
    at cb (http://localhost:6664/hospital/assets/js/angular.min.js?v=1499753083736:43:336

2、错误信息

$apply already in progress
HTML代码：

　　<input type="checkbox" id="check" ng-checked="checkVal" ng-click="select($event)">
　　<input type="checkbox" id="check1" class="checked" ng-click="toTrue($event,'dd')">
JS代码：

var array = [];
$scope.checkVal = true;
$scope.checkVal1 = false;

$scope.select = function (event) {
    var ele1 = document.getElementById('check1');
    ele1.click();
};

$scope.toTrue = function (event,val) {
    if(event.target.checked){
        array.push(val);

    }else{
        array.push('0');
    }
}

点击第一个checkbox就会报上面的错误信息，但是如果我把第二个checkbox的点击事件去掉就不会报错，哪位大神可以帮我解释一下原因吗？