廢話不多說了，直接給大家貼實現此功能的正則表達式代碼了，具體代碼如下所示：
#import <Foundation/Foundation.h>int main() {// ? == {0,1}// * == {0,無窮}// ＋ == {1,無窮}// /d == [0-9]// /w == [A-Za-z_0-9]// * 的意思是可有可無// [a|b|c]+ 表示三個至少出現一次或多次//檢測電話號碼是否正確NSString *tel = @"";//正則表達式NSString *regex = @"^//d*$";// NSString *regex = @"^[0-9]{3,4}-[0-9]{7,8}$";NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex];//創建需要滿足上面的正則表達式的謂詞NSLog(@"該電話號碼:%d",[predicate evaluateWithObject:tel]);//用戶名 （第一位必須是字母，6-16位，只能有字母，數字或下劃線）NSString *user = @"m54355";NSString *regex1 = @"^[A-Za-z]//w{5,15}$";NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex1];// NSLog(@"該電話號碼:%d",[predicate1 evaluateWithObject:user]);// //身份證// NSString *user1 = @"610125199301300814";// NSString *regex2 = @"^//d{17}[//dxX]$";// NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex2];// NSLog(@"該身份證:%d",[predicate2 evaluateWithObject:user1]);//郵箱NSString *mailbox = @"101707383@qq.com";NSString *regex3 = @"^[a-zA-Z0-9._%+-]+@[A-Za-z0-9.-]+//.[A-Za-z]{2,4}$";NSPredicate *predicate3 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex3];// NSLog(@"該郵箱:%d",[predicate3 evaluateWithObject:mailbox]);//手機號// NSString *phone = @"18709259205";// NSString *regex4 = @"^1[3|4|5|7|8]//d{9}$";// NSPredicate *predicate4 = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",regex4];// NSLog(@"該手機:%d",[predicate4 evaluateWithObject:phone]);if ([predicate1 evaluateWithObject:user] == 1) {if ([predicate3 evaluateWithObject:mailbox] == 1) {NSLog(@"登錄成功");}}else{NSLog(@"錯誤");}return 0;} 
