ios - 我希望将导航栏中的栏按钮项放置在导航栏的最角落

Question

当我尝试以下代码时，条形按钮与边缘之间的间距约为30px，

但我希望它离边缘仅2个像素。有办法吗？

我只需要栏按钮，而不是自定义UIButton。

UIImage* buttonImage = [UIImage imageNamedH568: @"publish_button.png"];

UIButton * clearButton = [UIButton buttonWithType: UIButtonTypeCustom];

clearButton.frame           = CGRectMake(244.0f, 5.0f, 65.0f, 33.0f);
clearButton.titleLabel.font = [Utils helveticaBoldFontOfSize: 12.0f];

[clearButton setBackgroundImage: buttonImage                        forState: UIControlStateNormal];
[clearButton setTitle:           NSLocalizedString(@"Clear", nil) forState: UIControlStateNormal];
[clearButton setTitleColor:      [UIColor whiteColor]               forState: UIControlStateNormal];

[clearButton addTarget: self action: @selector(clearNotificationsList:) forControlEvents: UIControlEventTouchUpInside];

UIBarButtonItem* clearItem = [[UIBarButtonItem alloc] initWithCustomView: clearButton];

self.navigationItem.rightBarButtonItem = clearItem;

Answer 1

从UINavigationItem-iOS7Spacing添加了以下两个功能

 - (UIBarButtonItem *)spacer
{
    UIBarButtonItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    space.width = -11;
    return space;
}

- (BOOL)isIOS7
{
    return ([[[UIDevice currentDevice] systemVersion] compare:@"7" options:NSNumericSearch] != NSOrderedAscending);
}

然后在loadView内部使用以下代码-

 UIBarButtonItem* clearItem = [[UIBarButtonItem alloc] initWithCustomView: clearButton];

    if ([self isIOS7]) {
        self.navigationItem.rightBarButtonItems = @[[self spacer],clearItem];
    }
    else
    {
        self.navigationItem.rightBarButtonItem = clearItem;
    }

完美地工作

谢谢大家的帮助!