废话不多说了，直接给大家贴实现此功能的正则表达式代码了，具体代码如下所示：
#import <Foundation/Foundation.h>
int main() {
// ? == {0,1}
// * == {0,无穷}
// ＋ == {1,无穷}
// \d == [0-9]
// \w == [A-Za-z_0-9]
// * 的意思是可有可无
// [a|b|c]+ 表示三个至少出现一次或多次
//检测电话号码是否正确
NSString *tel = @"";
//正则表达式
NSString *regex = @"^\\d*$";
// NSString *regex = @"^[0-9]{3,4}-[0-9]{7,8}$";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex];//创建需要满足上面的正则表达式的谓词
NSLog(@"该电话号码:%d",[predicate evaluateWithObject:tel]);
//用户名 （第一位必须是字母，6-16位，只能有字母，数字或下划线）
NSString *user = @"m54355";
NSString *regex1 = @"^[A-Za-z]\\w{5,15}$";
NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex1];
// NSLog(@"该电话号码:%d",[predicate1 evaluateWithObject:user]);
// //身份证
// NSString *user1 = @"610125199301300814";
// NSString *regex2 = @"^\\d{17}[\\dxX]$";
// NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex2];
// NSLog(@"该身份证:%d",[predicate2 evaluateWithObject:user1]);
//邮箱
NSString *mailbox = @"101707383@qq.com";
NSString *regex3 = @"^[a-zA-Z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}$";
NSPredicate *predicate3 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex3];
// NSLog(@"该邮箱:%d",[predicate3 evaluateWithObject:mailbox]);
//手机号
// NSString *phone = @"18709259205";
// NSString *regex4 = @"^1[3|4|5|7|8]\\d{9}$";
// NSPredicate *predicate4 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex4];
// NSLog(@"该手机:%d",[predicate4 evaluateWithObject:phone]);
if ([predicate1 evaluateWithObject:user] == 1) {
if ([predicate3 evaluateWithObject:mailbox] == 1) {
NSLog(@"登录成功");
}
}else{
NSLog(@"错误");
}
return 0;
}
