Plist文件的读写

@implementation ViewController
{
    NSMutableArray *markMutArray;
    UITextField *textField;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self initPlistData];
    [self getAndAddContent];
}

//
- (void)getAndAddContent
{
    textField = [[UITextField alloc] initWithFrame:CGRectMake(50, 60, 150, 40)];
    textField.borderStyle = UITextBorderStyleRoundedRect;
    [self.view addSubview:textField];
    
    UIButton *addbutton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    addbutton.frame = CGRectMake(230, 60, 100, 40);
    [addbutton setTitle:@"添加内容" forState:UIControlStateNormal];
    [addbutton addTarget:self action:@selector(clickAddContent) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:addbutton];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(100, 200, 90, 50);
    [button setTitle:@"读取内容" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(clickGetCont) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
}

//点击button添加内容
- (void)clickAddContent
{
    [markMutArray addObject:textField.text];
    
    NSDictionary *dic = @{@"分类": markMutArray};
    [dic writeToFile:[self dataFilePath] atomically:YES];
}

//点击button读取内容
- (void)clickGetCont
{
    NSString *filePath = [self dataFilePath];
    NSDictionary *dic = [[NSDictionary alloc] initWithContentsOfFile:filePath];
    NSArray *getDataArray = [dic objectForKey:@"分类"];
    NSLog(@"getDataArray:%@", getDataArray);
}

//初始化内容
- (void) initPlistData
{
    //1.首先获取文件的存取路径
    NSString *filePath = [self dataFilePath];
    NSLog(@"文件路径－－－%@", filePath);
    
    //检查数据文件是否存在，如果不存在就不加载它了，如果存在，就用该文件的内容实例化数组，然后将数组中的对象复制到4个文本字段。
    //由于是按顺序排列的列表，因此只要根据保存顺序来复制数组，就一定可以确保相应的字段获得正确的值
    if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
        NSDictionary *dic = [[NSDictionary alloc] initWithContentsOfFile:filePath];
        NSArray *arrayMark = [dic objectForKey:@"分类"];
        markMutArray = [NSMutableArray arrayWithArray:arrayMark];
    } else {
        markMutArray = [NSMutableArray arrayWithObjects:@"默认分类", @"新建分类", nil];
    }
    
    //4.将可变数组里面的数据按照路径写入文件
    NSDictionary *dic = @{@"分类" : markMutArray};
    [dic writeToFile:filePath atomically:YES];
}

//获取文件的路径
- (NSString*)dataFilePath
{
    //1.获取文件路径数组，这个是因为考虑到为mac编写代码的原因
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  //注意，括号里面的第一个元素是NSDocumentDirectory，而不是NSDocumentationDirectory
    
    //2.获取文件路径数组的第一个元素，因为我们只需要这一个
    NSString *documentPath = [paths objectAtIndex:0];
    
    //3.获取第2步得到的元素的字符串，并创建一个名为data.plist的.plist文件用于保存数据
    
    NSString *fileName = [documentPath stringByAppendingPathComponent:@"data.plist"];
    
    return fileName;
}

//点击键盘及编辑区域外区域收起键盘
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    if (![textField isExclusiveTouch]) {
        [textField resignFirstResponder];
    }
}

//读取plist文件
    //获取plist文件路径
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Property List" ofType:@"plist"];
    
    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:filePath];
    //字典dic的key为：sort，value为一个数组
    NSArray *dataArray = [NSArray arrayWithArray:[dic objectForKey:@"sort"]];
    NSLog(@"plist:%@", dataArray);