Question

我正在尝试使用以下正则表达式验证电子邮件地址字段

    + (BOOL) isValidEmail:(NSString *)email
{
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:email];
}

但它在验证以下案件时失败了。

i）test@-gmail.com

ii）test..test @ gmail.com

iii）.test @ gmail.com

iv）测试。@ gmail.com

请建议我在考虑这些情况时需要做哪些修改。

Answer 1

试试这个。

<?php

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class ToPostTable extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('posts', function(Blueprint $table)
        {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->text('body');
            $table->timestamps();
            $table->timestamp('published_at');   
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade'); 
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('posts');
    }

}

并检查电子邮件是否有效。

-(BOOL)emailValidation:(NSString *)str{
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest =[NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    BOOL myStringMatchesRegEx=[emailTest evaluateWithObject:str];

    if (myStringMatchesRegEx == 0) {
        return FALSE;
    }
    return TRUE;
}

验证电子邮件地址使用Regex

1 个答案: