Question

我正在尝试为我的UIBarButtonItem设置图像，但我无法做到这一点。我尝试了两次，在第一种情况下，我将我的图像放在正确的位置，但是当我点击按钮时没有任何反应（它应该弹出一个新窗口，但没有任何效果）。我使用了一段代码：

UIImage *faceImage = [UIImage imageNamed:@"plus_button.png"];
    UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];
    face.bounds = CGRectMake( 0, 0, faceImage.size.width, faceImage.size.height );
    [face setImage:faceImage forState:UIControlStateNormal];
   UIBarButtonItem *faceBtn = [[[UIBarButtonItem alloc] initWithCustomView:face]initWithImage:faceImage style:UIBarButtonItemStylePlain target:self action:@selector(addProduct:)];

    self.navigationItem.leftBarButtonItem = faceBtn;

在第二种情况下，我在按钮上设置图像，并且应该出现新窗口，但是不仅我想要的自定义图像，而且它还显示“边框”，看起来图像被放在默认的中心按钮。显然我只想要我的图像，而不仅仅是我的图像。我在第二种情况下使用了一段代码：

UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithImage:faceImage style:UIBarStyleDefault target:self action:@selector(addProduct:)];

    self.navigationItem.leftBarButtonItem = addButton;

请帮我解决问题，任何帮助将不胜感激，谢谢！

Answer 1

试试这个...改变它的方法，根据你的图像

UIButton *button1=[UIButton buttonWithType:UIButtonTypeCustom];
[button1 setFrame:CGRectMake(10.0, 2.0, 45.0, 40.0)];
[button1 addTarget:self action:@selector(showLeft:) forControlEvents:UIControlEventTouchUpInside];
[button1 setImage:[UIImage imageNamed:@"left-arrow-button.png"] forState:UIControlStateNormal];
UIBarButtonItem *button = [[UIBarButtonItem alloc]initWithCustomView:button1];
self.navigationItem.leftBarButtonItem = button;

Answer 2

我修改了您的代码并测试了按钮中显示的图像。请自己尝试一下。如果你遇到任何问题，请告诉我。

    UIImage *faceImage = [UIImage imageNamed:@"Badge.png"];
    UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];
    face.bounds = CGRectMake( 0, 0, faceImage.size.width, faceImage.size.height );
    [face addTarget:self action:@selector(showAlerts) forControlEvents:UIControlEventTouchUpInside];
    [face setImage:faceImage forState:UIControlStateNormal];
    UIBarButtonItem *faceBtn = [[UIBarButtonItem alloc] initWithCustomView:face];    
    self.navigationItem.leftBarButtonItem = faceBtn;

编辑：我在答案中添加了一句话。我刚刚在日志中打印了一条消息“嗨”。这是工作。你能试试吗？

感谢。

Answer 3

或者......只需编写两行iOS 8 Swift代码。（甚至可能在iOS 7中工作）

    let doneButtonAsLeftArrow = UIBarButtonItem(image: UIImage(named: "LeftArrow24x24.png"), style: .Plain, target: self, action: "doneButtonPushed")
    navigationItem.leftBarButtonItem = doneButtonAsLeftArrow

Answer 4

UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithImage:faceImage style: UIButtonTypeCustom target:self action:@selector(addProduct:)];

    self.navigationItem.leftBarButtonItem = addButton;

您正在创建默认按钮，您需要创建一个UIButtonTypeCustom类型按钮...

Answer 5

任何人接受的答案的快速版本

var settingsButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
settingsButton.frame = CGRect(origin: CGPointZero, size: CGSize(width: 36, height: 36))
settingsButton.setImage(image, forState: UIControlState.Normal)
settingsButton.addTarget(self, action: "buttonActionHere:", forControlEvents: UIControlEvents.TouchUpInside)

let rightBarButtonItem = UIBarButtonItem(customView: settingsButton)
navigationItem.setRightBarButtonItem(rightBarButtonItem, animated: true)

无法为UIBarButtonItem设置图像

5 个答案: