Ios 使用NSMutableDictionary进行验证

我有一个结合了用户名和密码的

NSMutableDictionary

，如何使用objective C验证它

例如：

如何将用户名和密码作为键值对进行验证。

多种方法：

一行：

NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
         @"username1", @"pass1",
         @"username2", @"pass2",
         @"username3", @"pass3",
         @"username4", @"pass4", nil];

另一种方式：

NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:@"username1" forKey:@"pass1"];
[dict setObject:@"username2" forKey:@"pass2"];
// so on ...

另一个使用

NSArray

：

NSArray *username = @[@"username1", @"username2", @"username3", @"username4"];
NSArray *passwords = @[@"pass1", @"pass2", @"pass3", @"pass4"];
NSDictionary *dict = [NSDictionary dictionaryWithObjects:username forKeys:passwords];

// see output
NSLog(@"%@", dict);
// separately
NSLog(@"Usernames: %@", [dict allValues]);
NSLog(@"Passwords: %@", [dict allKeys]);

您可以通过相应地提取单独的键和值或使用块enumerateKeysAndObjectsUsingBlock进行验证：

[dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {

    // place your validation code here 
    NSLog(@"There are %@ %@'s in stock", obj, key);
}];

---

.

要轻松验证字典的内容，只需访问键并验证值即可

例子：

//假设密钥是用户名，值是密码
NSDictionary*credential=@{“username1”：@“pass1”：@“username2”：@“pass2”/*，…等等*/}；
NSString*用户名=@；
NSString*passwordInput=@；
NSString*密码=凭证[用户名]；
//如果由于用户名不存在而导致密码为零，则以下条件将失败。
if（[密码IsequalString:passwordInput]）{
//密码和用户名都匹配
}
否则{
//用户名或密码不匹配
}

这里的关键是用户名？@krishna Skw首先你告诉我你必须进行哪种用户名验证？意思是像电子邮件验证？克里希纳检查我的ans，让我知道你的反馈。

[dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {

    // place your validation code here 
    NSLog(@"There are %@ %@'s in stock", obj, key);
}];

// this assumes that the key is the username and the value is the password
NSDictionary *credential = @{@"username1":@"pass1",@"username2":@"pass2"/* , ..and so on */};

NSString *username = @"<user_input_or_whatever>";

NSString *passwordInput = @"<user_input_or_whatever>";

NSString *password = credential[username];

// if password is nil because username is not present the the condition below fails.
if([password isEqualToString:passwordInput]){
   // both password and username matched
}
else{
  // username or password didn't matched
}