[code="html"]
[/code]
JS面向對象 對象包含對象無法調用內部對象函數的問題
报Uncaught TypeError: Cannot call method 'area' of undefined错误，
各位小虾大虾们，有空帮忙看看啊，thanks in advance！
你这里的 prototype 只是一个实例，你只是将 area 方法加到 prototype 这个 TreeNode, 将
[code="javascript"]
prototype.generateChildren = function() {
for(var i = 0; i < 2; i++ ) {
var node = new TreeNode();
this.children.push(node);
}
}
prototype.area = function(w) {
if(w <= 1) {
return 1;
} else {
w -= 1;
return this.zoom*this.area(w);
}
}
[/code]
改为
[code="javascript"]
TreeNode.prototype.generateChildren = function() {
for(var i = 0; i < 2; i++ ) {
var node = new TreeNode();
this.children.push(node);
}
}
TreeNode.prototype.area = function(w) {
if(w <= 1) {
return 1;
} else {
w -= 1;
return this.zoom*this.area(w);
}
}
[/code]