我正在以角度4制作一个网络应用程序,我想出了一个问题。 它是以下内容:
我使用名为currentLesson的属性。此属性的变量编号为1到6。 在我的组件中,我列出了6个课程,每节课都有自己的按钮来开始本课程。
在此列表中,只有当currentLesson具有课程编号的值时才能单击按钮:
第1课的按钮在以下情况下处于活动状态:currentLesson = 1
第2课的按钮在以下情况下处于活动状态:currentLesson = 2
等。等
因此,如果currentLesson = 2,则应禁用第1,3,4,5和6课的按钮。
我有以下设置,但它似乎没有用。 在我的组件中,我有:
export class ClassComponent implements OnInit {
classes = [
{
name: 'string',
level: 'string',
code: 'number',
currentLesson: '1'
}]
checkCurrentLesson1 = function(classes) {
if (classes.currentLesson = 1) {
return true;
}
else {
return false;
}
};
checkCurrentLesson2 = function(classes) {
if (classes.currentLesson = 2) {
return true;
}
else {
return false;
}
};
我的html文件是这样的:
<ul class="table lessonOverview">
<li>
<p>Lesson 1</p>
<button [routerLink]="['/lesson1']"
[disabled]="!checkCurrentLesson1" class="primair">
Start lesson</button>
</li>
<li>
<p>Lesson 2</p>
<button [routerLink]="['/lesson2']"
[disabled]="!checkCurrentLesson2" class="primair">
Start lesson</button>
</li>
</ul>
(我只打印了六个课程中的两个,但它们都是一样的)
有没有人为我提供解决方案或想法?
提前致谢,
马腾
答案 0 :(得分:15)
为当前课程设置属性:currentLesson
。显然,这将是选择课程的“数量”。在每个按钮上单击,将currentLesson
值设置为“数字”/按钮的顺序,即对于第一个按钮,它将为“1”,对于第二个“2”,依此类推。
现在可以使用[禁用]属性禁用每个按钮,如果currentLesson
与其订单不同,则可以禁用。
<强> HTML 强>
<button (click)="currentLesson = '1'"
[disabled]="currentLesson !== '1'" class="primair">
Start lesson</button>
<button (click)="currentLesson = '2'"
[disabled]="currentLesson !== '2'" class="primair">
Start lesson</button>
.....//so on
<强>打字稿强>
currentLesson:string;
classes = [
{
name: 'string',
level: 'string',
code: 'number',
currentLesson: '1'
}]
constructor(){
this.currentLesson=this.classes[0].currentLesson
}
将所有内容置于循环中:
<强> HTML 强>
<div *ngFor="let class of classes; let i = index">
<button [disabled]="currentLesson !== i + 1" class="primair">
Start lesson {{i + 1}}</button>
</div>
<强>打字稿强>
currentLesson:string;
classes = [
{
name: 'Lesson1',
level: 1,
code: 1,
},{
name: 'Lesson2',
level: 1,
code: 2,
},
{
name: 'Lesson3',
level: 2,
code: 3,
}]
答案 1 :(得分:0)
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/sz/62b931pd5zjbclx2fzpkww1w0000gn/T/pip-build-0vb25t/pyautogui/setup.py", line 6, in <module>
version=__import__('pyautogui').__version__,
File "pyautogui/__init__.py", line 110, in <module>
from . import _pyautogui_osx as platformModule
File "pyautogui/_pyautogui_osx.py", line 7, in <module>
assert False, "You must first install pyobjc-core and pyobjc: https://pyautogui.readthedocs.io/en/latest/install.html"
AssertionError: You must first install pyobjc-core and pyobjc: https://pyautogui.readthedocs.io/en/latest/install.html
答案 2 :(得分:0)
const weirdSum = (num) => {
let result = 0;
const split = num.toString().split('');
if(split.length > 1){
for(let i=0;i<split.length;i++){
result = result + (split[i]*1);
}
return weirdSum(result); // pass result as argument, which will be split.
}
return num; // return result if split.length is 1
}
console.log(weirdSum(84));
答案 3 :(得分:0)
my.component.html:
<button [disabled]="isSubmitBtnDisabled" (click)="addGame()">Send</button>
my.component.ts:
export class My implements OnInit {
isSubmitBtnDisabled: boolean= false;
private someMethodYouCalled() {
this.isSubmitBtnDisabled = true; //Controls if button is disabled
}
}