ios – NSNotificationCenter多次呼叫

我在我的应用程序中实现了NSNotificationCenter.我在完成图像解码时发送通知.第一次图像解码将完成8次.所以通知假设发送8次.但它调用64次(8 * 8).

这是我的代码我是如何实现的 – >
//初始化

- (id)initWithFrame:(CGRect)frame
{
  self = [super initWithFrame:frame];
 if (self) {

    [[NSNotificationCenter defaultCenter] addobserver:self
                                                      selector:@selector(getHRImage:)
                                                             name:@"DecodeComplete" object:nil];}

//调用方法

-(void)getHRImage:(NSNotification *) notification
{

if ([[notification name] isEqualToString:@"DecodeComplete"])
    NSLog (@"Successfully received the DecodeComplete notification! ");
}`

//解除分配

- (void) dealloc
{
      [[NSNotificationCenter defaultCenter] removeObserver:self name:@"DecodeComplete" object:self];
    //[super dealloc];
}

//发布通知

[[NSNotificationCenter defaultCenter] postNotificationName:@"DecodeComplete" object:self];

有人可以建议我做错了.

提前致谢.

//调用方法是这样的(调用8次)

-(void)decode
{
   NSLog(@"---------- Decoding is Complete ---------");
     [[NSNotificationCenter defaultCenter]  postNotificationName:@"MdjDecodeComplete" object:self];

}

解决方法

解：
我重新检查了我的代码,initWithFrame：(CGRect)框架调用了8次,并添加了8次NSNotification观察器.

所以我改变了这样的代码,—>>初始化.

static bool note=YES;
- (id)initWithFrame:(CGRect)frame
{
  self = [super initWithFrame:frame];
  if (self) {
  if(note)
 [[NSNotificationCenter defaultCenter] addobserver:self

                                                  selector:@selector(getHRImage:)
                                                         name:@"DecodeComplete" object:nil]; note=NO;}

—>>取消分配

- (void) dealloc
  {
    note=true;

  [[NSNotificationCenter defaultCenter] removeObserver:self name:@"DecodeComplete" object:nil];
//[super dealloc];
}

现在addobserver方法只调用一次,所以我的问题解决了.谢谢大家的宝贵指导.

原文地址：https://www.jb51.cc/iOS/331349.html