如何在导航栏上的UIBarButtonItem中调整UIButton图像的偏移量？

Question

这是我用来在我的导航栏上插入自定义UIBarButtonItem作为leftButton的代码。问题是按钮离左边缘太近了，我无法弄清楚如何稍微缩进它而不使用另一张左侧带填充的图片？

UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
btn.imageEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
[btn setBackgroundImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
self.myBtn = btn;
[btn release];

UIBarButtonItem *barBtn = [[UIBarButtonItem alloc] initWithCustomView:self.myBtn];
self.myBarBtn = barBtn;
self.myBarBtn.imageInsets = UIEdgeInsetsMake(0, 5, 0, 0);
[self.navigationItem setLeftBarButtonItem:self.myBarBtn animated:YES];
[barBtn release];

我尝试过调整框架、edgeInsets，但都没有成功。barButtonItem 仍然离左边缘太近。有没有办法偏移按钮的图像？

谢谢。

- James

Answer 1

    UIImage *buttonImage = [UIImage imageNamed:@"Close.png"];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:buttonImage forState:UIControlStateNormal];
    button.imageEdgeInsets = UIEdgeInsetsMake(0, -40, 0, 0);
    button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);

    [button addTarget:self action:@selector(donePressed:) forControlEvents:UIControlEventTouchUpInside];

    //create a UIBarButtonItem with the button as a custom view
    UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];
    self.navigationItem.leftBarButtonItem = customBarItem;

- hariszaman

Answer 2

使用Swift语言可以创建自定义的左侧或右侧按钮

let buttonEdit: UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton
buttonEdit.frame = CGRectMake(0, 0, 40, 40)
buttonEdit.setImage(UIImage(named:"nav-right-Y.png"), forState: UIControlState.Normal)
buttonEdit.addTarget(self, action: "rightNavItemEditClick", forControlEvents: UIControlEvents.TouchUpInside)
var rightBarButtonItemEdit: UIBarButtonItem = UIBarButtonItem(customView: buttonEdit)
self.navigationItem.rightBarButtonItem = rightBarButtonItemEdit

- fatihyildizhan

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我该如何在使用该方法后进行偏移？ - senty