我如何在ios中的Plist文件中保存,检索,删除和更新我的数据？

我正在创建一个iPhone应用程序,其中我得到所有国家的名称,标志和参赛者姓名.我想保存该数据在.plist而不是sqlite服务器.我不知道如何在DocumentDirectory中创建一个plist文件并保存数据.

请有人建议我如何保存plist文件中的数据.

解决方法

我将通过截图进行一步一步的处理.请遵循这一点,你会得到你的答案.

首先,您必须通过Xcode创建属性列表.

步骤1

第2步

步骤：3

保存按钮上的数据操作：

// Take 3 array for save the data .....

    -(IBAction)save_Action:(id)sender
    {
        NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,NSUserDomainMask,YES);
        NSString *documentsPath = [paths objectAtIndex:0];
        NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];

        [self.nameArr addObject:self.nameField.text];
        [self.countryArr addObject:self.countryField.text];
        [self.imageArr addObject:@"image.png"];

        NSDictionary *plistDict = [[NSDictionary alloc] initWithObjects: [NSArray arrayWithObjects: self.nameArr,self.countryArr,self.imageArr,nil] forKeys:[NSArray arrayWithObjects: @"Name",@"Country",@"Image",nil]];

        NSString *error = nil;
        NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:plistDict format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];

        if(plistData)
        {
            [plistData writeToFile:plistPath atomically:YES];
            alertLbl.text = @"Data saved sucessfully";
        }
        else
        {
            alertLbl.text = @"Data not saved";
        }
    }
 // Data is saved in your plist and plist is saved in DocumentDirectory

步骤4

从plist检索数据文件：

NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];

    if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath])
    {
        plistPath = [[NSBundle mainBundle] pathForResource:@"manuallyData" ofType:@"plist"];
    }

    NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
    self.nameArr = [dict objectForKey:@"Name"];
    self.countryArr = [dict objectForKey:@"Country"];

步骤：5

从plist文件中删除数据：

NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];
    NSMutableDictionary *dictionary = [NSMutableDictionary dictionaryWithContentsOfFile:(NSString *)plistPath];

    self.nameArr = [dictionary objectForKey:@"Name"];
    self.countryArr = [dictionary objectForKey:@"Country"];

    [self.nameArr removeObjectAtIndex:indexPath.row];
    [self.countryArr removeObjectAtIndex:indexPath.row];

    [dictionary writeToFile:plistPath atomically:YES];

步骤：6

更新您的数据更新单击操作：

NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory,YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];

    if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath])
    {
        plistPath = [[NSBundle mainBundle] pathForResource:@"manuallyData" ofType:@"plist"];
    }

    self.plistDic = [[NSDictionary alloc] initWithContentsOfFile:plistPath];

    [[self.plistDic objectForKey:@"Name"] removeObjectAtIndex:self.indexPath];
    [[self.plistDic objectForKey:@"Country"] removeObjectAtIndex:self.indexPath];
    [[self.plistDic objectForKey:@"Image"] removeObjectAtIndex:self.indexPath];

    [[self.plistDic objectForKey:@"Name"] insertObject:nameField.text atIndex:self.indexPath];
    [[self.plistDic objectForKey:@"Country"] insertObject:countryField.text atIndex:self.indexPath];
    [[self.plistDic objectForKey:@"Image"] insertObject:@"dhoni.jpg" atIndex:self.indexPath];

    [self.plistDic writeToFile:plistPath atomically:YES];

我如何在ios中的Plist文件中保存,检索,删除和更新我的数据？

解决方法

猜你在找的iOS相关文章