Iphone 在Plist中编辑凭证（如果正确）

在plist中，我存储了来自的凭据，我需要检查正确的凭据，如果正确的凭据匹配，则用新的替换密码字段。为此，我有3个

UITextField

。A表示新的电子邮件id，b表示当前密码，c表示新密码。如果

A==b

表示

current password==email id

，则在c文本字段中输入的新密码应替换为

plist中当前密码字段中的新密码

-（无效）身份验证凭据{
NSMUTABLEARRY*plistArray=[NSMUTABLEARRY arrayWithArray:[self readFromPlist]]；
对于（int i=0；i<[plistaray计数]；i++）
{
id object=[plistaray objectAtIndex:i]；
if（[object iskindof类：[NSDictionary类]]）{
NSDictionary*objDict=（NSDictionary*）对象；
如果（[[objDict objectForKey:@“pass”]IseQualtString:emailTextFeild.text]&&[[objDict objectForKey:@“title”]IseQualtString:passwordTextFeild.text]）
{
NSLog（“正确的凭证”）；
//将当前密码替换为新密码的条件是什么
}
NSLog（@“不正确的凭证”）；
}否则{
NSLog（@“错误！不是字典”）；
}
}
}
检查这是否适合您

- (void)authenticateCredentials {

    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                                 NSUserDomainMask, YES);
    NSString *documentsDirectory = [documentPaths objectAtIndex:0];
    NSString *documentPlistPath = [documentsDirectory stringByAppendingPathComponent:@"XYZ.plist"];
    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:documentPlistPath];
    NSArray *plistArray = [dict objectForKey:@"title"];

    NSMutableArray *plistUpdatedArray = [NSMutableArray arrayWithArray:plistArray];

    for (int i = 0; i< [plistArray count]; i++)
    {
        id object = [plistArray objectAtIndex:i];

        if ([object isKindOfClass:[NSDictionary class]]) {
            NSDictionary *objDict = (NSDictionary *)object;

            if ([[objDict objectForKey:@"pass"] isEqualToString:emailTextFeild.text] && [[objDict objectForKey:@"title"] isEqualToString:passwordTextFeild.text])
            {
                NSLog(@"Correct credentials");

                NSMutableDictionary *dict1 = [NSMutableDictionary dictionaryWithDictionary:objDict];
                [dict1 setObject:newPassword forKey:@"title"];

                [plistUpdatedArray replaceObjectAtIndex:i withObject:dict1];

                NSMutableDictionary *dict2 = [NSMutableDictionary dictionaryWithDictionary:dict];
                [dict2 setObject:plistUpdatedArray forKey:@"title"];
                [dict2 writeToFile:documentPlistPath atomically:YES];

                return;
            }
            NSLog(@"INCorrect credentials");
        } else {
             NSLog(@"Error! Not a dictionary");
        }
    }
}

-（无效）身份验证凭据{
NSArray*DocumentPath=NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，
NSUserDomainMask，是）；
NSString*documentsDirectory=[documentPaths objectAtIndex:0]；
NSString*documentPlistPath=[DocumentsDirectoryStringByAppendingPathComponent:@“XYZ.plist”]；
NSDictionary*dict=[NSDictionary Dictionary WithContentsOfFile:documentPlistPath]；
NSArray*plistArray=[dict objectForKey:@“title”]；
NSMutableArray*plistUpdatedArray=[NSMutableArray阵列WithArray:plistArray]；
对于（int i=0；i<[plistaray计数]；i++）
{
id object=[plistaray objectAtIndex:i]；
if（[object iskindof类：[NSDictionary类]]）{
NSDictionary*objDict=（NSDictionary*）对象；
如果（[[objDict objectForKey:@“pass”]IseQualtString:emailTextFeild.text]&&[[objDict objectForKey:@“title”]IseQualtString:passwordTextFeild.text]）
{
NSLog（“正确的凭证”）；
NSMutableDictionary*dict1=[NSMutableDictionary Dictionary WithDictionary:objDict]；
[dict1 setObject:newPassword forKey:@“title”]；
[plistUpdatedArray replaceObjectAtIndex:i with object:dict1]；
NSMutableDictionary*dict2=[NSMutableDictionary Dictionary WithDictionary:dict]；
[dict2 setObject:Darray forKey:@“标题”]；
[dict2 writeToFile:documentPlistPath原子性：是]；
返回；
}
NSLog（@“不正确的凭证”）；
}否则{
NSLog（@“错误！不是字典”）；
}
}
}
如果plist在bundle中，则无法更改其中存储的值。
所以，在进行任何更改之前，请将其复制到文档目录

回答你的问题：

if([emailField.text isEqualToString:currntPwd.txt])
{
   NSMutableDictionary *newDict = [[NSMutableDictionary alloc] init];
  [newDict addEntriesFromDictionary:objDict];
  [newDict setObject:@"Midhun" forKey:@"pass"];
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                             NSUserDomainMask, YES);
   NSString *docDirectory = [paths objectAtIndex:0];
   NSString *plistPath = [docDirectory stringByAppendingPathComponent:@"yourPlist.plist"];
   [[NSFileManager defaultManager] removeItemAtPath:plistPath];
   [newDict writeToFile:plistPath atomically:YES];
}

嗨，我需要你的帮助，关于同一个问题。。在其他一些屏幕中，我必须获取登录用户的电子邮件id，并显示在标签中……我已在新屏幕中使用Readplist函数现在如何调用登录用户的电子邮件id检查此链接
if([emailField.text isEqualToString:currntPwd.txt])
{
   NSMutableDictionary *newDict = [[NSMutableDictionary alloc] init];
  [newDict addEntriesFromDictionary:objDict];
  [newDict setObject:@"Midhun" forKey:@"pass"];
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                             NSUserDomainMask, YES);
   NSString *docDirectory = [paths objectAtIndex:0];
   NSString *plistPath = [docDirectory stringByAppendingPathComponent:@"yourPlist.plist"];
   [[NSFileManager defaultManager] removeItemAtPath:plistPath];
   [newDict writeToFile:plistPath atomically:YES];
}