/**
 *   点击保存按钮
 */
- (IBAction)saveDataBtnClick:(id)sender {
    
    // youtube做法
//    NSString *path = @"/Users/apple/Library/Application Support/iPhone Simulator/7.1/Applications/A6D53E11-DDF0-4392-B2D4-FE77A96888A6/Documents/abc.plist";
    
    // 获取应用程序沙河目录
    NSString *home = NSHomeDirectory();
    // 不建议写/
//    NSString *path = [home stringByAppendingString:@"/Documents"];
    // 不建议Documents写死
//    NSString *path = [home stringByAppendingPathComponent:@"Documents"];
    
    // NSUserDomainMask 在用户目录下查找
    // YES 代表用户目录的~
    // NSDocumentDirectory 查找Documents文件夹
    // 建议使用如下方法动态获取
    NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    // 拼接文件路径
    NSString *path = [doc stringByAppendingPathComponent:@"abc.plist"]
    ;
    NSLog(@"%@", path);
//    NSArray *arr = @[@"lnj", @"28"];
//    [arr writeToFile:path atomically:YES];
    
    // NSDictionary *dict = @{@"name": @"lnj", @"age":@"28"};
    // 调用writeToFile将数据写入文件
    // [dict writeToFile:path atomically:YES];
    
    /*
     plist只能存储系统自带的一些常规的类, 也就是有writeToFile方法的对象才可以使用plist保存数据
     字符串/字典/数据/NSNumber/NSData ...
     */
    
    // 自定义的对象不能保存到plist中
    NJPerson *p = [[NJPerson alloc] init];
    p.name =@"lnj";
    
    NSDictionary *dict = @{@"person": @"abc"};
    [dict writeToFile:path atomically:YES];
}
/**
 *   点击读取按钮
 */
- (IBAction)readDataBtnClick:(id)sender {
    NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    
    NSString *path = [doc stringByAppendingPathComponent:@"abc.plist"]
    ;
    // 读取数据
    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];
    NSLog(@"%@", dict);
}