+(BOOL)validateWithPassword:(NSString *)password
{
//密码只包含字母,数字,字符中至少两种
NSString * regex =@"^(?![0-9]+$)(?![a-zA-Z]+$)[a-zA-Z0-9]{6,18}$";
NSPredicate * pas= [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
return[pas evaluateWithObject:password];
}
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