iOS mvc间的数据传递

以国旗选择为例
flag
flagview
viewcontroller(uipickerview)

解释：flag中：
{

• (instancetype)initWithDic:(NSDictionary *)dic
  { 字典转模型的方法实现，初始化
  if (self = [super init]) {
  [self setValuesForKeysWithDictionary:dic];
  }
  return self;
  }

• (instancetype)flagWithDic:(NSDictionary *)dic
  {
  return [[self alloc] initWithDic:dic];
  }`

• (NSArray *)flagList
  {
  //加载plist<# model #>
  NSString *path = [[NSBundle mainBundle] pathForResource:@"flags" ofType:@"plist"];
  NSArray *dicArray = [NSArray arrayWithContentsOfFile:path];

  //字典转模型（循环将数据模型保存文模型数组）
  NSMutableArray *tmpArray = [NSMutableArray array];
  for (NSDictionary *dic in dicArray) {
  Flag *flag = [Flag flagWithDic:dic];
  [tmpArray addObject:flag];
  }
  return tmpArray;
  }
  flagview:
  @property(nonatomic,strong)Flag *flag;
  //实现flag的set方法：如果接收数据，可对view进行相关初始化操作
  -(void)setFlag:(Flag *)flag{

  _flag = flag;

  self.nameLabel.text = flag.name;
  self.imageView.image = [UIImage imageNamed:flag.icon];

}
viewcontroller:
@property (nonatomic,strong) NSArray *flags;
//懒加载，得到模型数组，实现flags的get方法
-(NSArray *)flags{
if (!_flags) {
_flags = [Flag flagList];
}

return _flags;

}
//调用flagview.flag的set方法，传入数据。
Flag *flag = self.flags[row];
flagView.flag = flag;