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objective-c - objective-c : what is a "(id) sender"?

在一些IBAction中我看到了:-(IBAction)pushButton:(id)sender;这个(id)sender什么时候用? 最佳答案 MattGalloway描述了(id)sender的含义因此,在iPhoneDevSDK论坛上采取行动:(id)senderistheobjectwhichsentthemessagetothatselector.It'slikeinthedelegatefunctionswhereyouhavethecontrolpassedintothefunction,etc.You'duseth

objective-c - objective-c : what is a "(id) sender"?

在一些IBAction中我看到了:-(IBAction)pushButton:(id)sender;这个(id)sender什么时候用? 最佳答案 MattGalloway描述了(id)sender的含义因此,在iPhoneDevSDK论坛上采取行动:(id)senderistheobjectwhichsentthemessagetothatselector.It'slikeinthedelegatefunctionswhereyouhavethecontrolpassedintothefunction,etc.You'duseth

objective-c - UITapGestureRecognizer选择器,sender是手势,不是ui对象

我有一系列使用它们的标签识别的ImageView。我已向图像添加了单击手势。UITapGestureRecognizer*singleTap=[[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(selectImage:)];[tableGridImageaddGestureRecognizer:singleTap];tableGridImage.userInteractionEnabled=YES;[singleTaprelease];这成功地调用了selectImage选择器,但将手势作为发送者传递。我需

objective-c - UITapGestureRecognizer选择器,sender是手势,不是ui对象

我有一系列使用它们的标签识别的ImageView。我已向图像添加了单击手势。UITapGestureRecognizer*singleTap=[[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(selectImage:)];[tableGridImageaddGestureRecognizer:singleTap];tableGridImage.userInteractionEnabled=YES;[singleTaprelease];这成功地调用了selectImage选择器,但将手势作为发送者传递。我需