link: function(scope,elm,attrs,ctrl) {
ctrl.$parsers.unshift(function(viewValue) {
scope.pwdValidLength = (viewValue && viewValue.length >= 8 ? 'valid' : undefined);
scope.pwdHasLetter = (viewValue && /[A-z]/.test(viewValue)) ? 'valid' : undefined;
scope.pwdHasNumber = (viewValue && /\d/.test(viewValue)) ? 'valid' : undefined;
if(scope.pwdValidLength && scope.pwdHasLetter && scope.pwdHasNumber) {
ctrl.$setValidity('pwd',true);
return viewValue;
} else {
ctrl.$setValidity('pwd',false);
return undefined;
}
});
}
http://jsfiddle.net/adamdbradley/Qdk5M/
在上面提到的小提琴中，密码验证是如何进行的？
$ parser.unshift做了什么？什么是test(viewValue)…..的用途？
我已经推荐了AngularJs的主要网站，但无法理解任何事情……
请一步一步指导我如何验证……
我是angularJS的新手..
以下是逐步说明。请注意，文档非常好：
the forms和
the $parsers上的页面是您正在寻找的页面。
link: function(scope,ctrl) {
/**
* This function is added to the list of the $parsers.
* It will be executed the DOM (the view value) change.
* Array.unshift() put it in the beginning of the list,so
* it will be executed before all the other
*/
ctrl.$parsers.unshift(function(viewValue) {
scope.pwdValidLength = (viewValue && viewValue.length >= 8 ? 'valid' : undefined); // Check the length of the string
scope.pwdHasLetter = (viewValue && /[A-z]/.test(viewValue)) ? 'valid' : undefined; // Check if the string contains letter. RegExp.test() simply returns a boolean if the string matches the regex.
scope.pwdHasNumber = (viewValue && /\d/.test(viewValue)) ? 'valid' : undefined; // Check if the string contains digit. Same remark.
if(scope.pwdValidLength && scope.pwdHasLetter && scope.pwdHasNumber) { // If all is good,then…
ctrl.$setValidity('pwd',true); // Tell the controlller that the value is valid
return viewValue; // Return this value (it will be put into the model)
} else { // … otherwise…
ctrl.$setValidity('pwd',false); // Tell the controlller that the value is invalid
return undefined; // When the value is invalid,we should return `undefined`,as asked by the documentation
}
});
}
