正则表达式（实用篇）

大家好，本人总结了一些实用的正则表达式判断方法，经测试可以用（仅针对iOS），如果还有其他常用的方法，大家可以写出来互相学习，谢谢思密达！

//匹配Email

- (BOOL)isEmail:(NSString*)str
{
    NSString *regex = @"^[\\w-]+(\\.[\\w-]+)*@([\\w-]+\\.)+(com|net|org|edu|gov|cn|info)$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配正数

- (BOOL)isNumber:(NSString*)str
{
    NSString *regex = @"^(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*))$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配正整数

- (BOOL)isNumber1:(NSString*)str
{
    NSString *regex = @"^[1-9]\\d*$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配正整数或0

- (BOOL)isNumber2:(NSString*)str
{
    NSString *regex = @"^[0-9]\\d*$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配整数

- (BOOL)isNumber3:(NSString*)str
{
    NSString *regex = @"^-?[1-9]\\d*$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配非负数

- (BOOL)isNumber4:(NSString*)str
{
    NSString *regex = @"^\\d+(\\.\\d+)?$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配手机

- (BOOL)isMobile:(NSString*)str
{
    NSString *regex = @"^(13[0-9]|15[0-9]|18[0-9]|14[0-9]]|17[0-9])\\d{8}$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配英文数字

- (BOOL)isEnglishAndNumber:(NSString*)str
{
    NSString *regex = @"^[A-Za-z0-9]+$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

//匹配中文

- (BOOL)checkName:(NSString*)str{
    NSString *regex = @"^[\u4E00-\u9FA5]+$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}

// 校验密码强度

//密码的强度必须是包含大小写字母和数字的组合，不能使用特殊字符，长度在8-10之间。
- (BOOL)checkPassword:(NSString*)str{
    NSString *regex = @"^(?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{8,10}$";
    NSPredicate *pre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pre evaluateWithObject:str];
}