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How can I write the actions for image view when touch it in iPhone-OS 4.0

touch uiimageview iphone

Pugalmuni Tom Tharakan · 技术社区 · 16 年前

I want to display the image in navigation bar instead of a back button with an action. So now I have used image view and displayed the image in the navigation bar. Now I want to write the actions for image view, when touch or click the image view. Is it possible to write an action for image view?

I am currently working in iPhone OS 4.0.

请看 my previous question .

这是我的代码:

     UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(0,5,40,40)];
     [self.navigationController.navigationBar addSubview:view1];
     view1.backgroundColor = [UIColor clearColor];

     UIImage *img = [UIImage imageNamed:@"Back.png"];
     UIImageView *imgView = [[UIImageView alloc] initWithImage:img];
     [view1 addSubview:imgView];

如何为图像视图编写操作?

2 回复 | 直到 13 年前

Eiko 16 年前

Before iOS 3.2, nou would need a sublass of UIImageView and implement the touch handlers. Or replace your UIImageView with a UIButton with custom type.

用iOS 3.2 +, UIGestureRecognizer is what gets your things done efficiently - just add the appropriate one to your view.

tc. 16 年前

不要将视图直接添加到导航栏,除非您准备好让它在未来的操作系统版本中中断。

UIButton * b = [UIButton buttonWithType:UIButtonTypeCustom];
b.image = [UIImage imageNamed:@"Back.png"];
b.frame = (CGRect){{0,0},{40,40}};
[b addTarget:self action:@selection(wahatever) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:b] autorelease];

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