如何更改BarButtonItem的水平位置

Question

我可以使用setBackgroundVerticalPositionAdjustment更改自定義條形按鈕項的y，但是如何更改水平位置？

[viewController.navigationItem.rightBarButtonItem setBackgroundVerticalPositionAdjustment:50 forBarMetrics:UIBarMetricsDefault]; 

Answer 1

您可以使用自定義視圖創建欄按鈕，並在該視圖中創建自己的佈局。它可以只是簡單的UIButton，你可以在UIButton中設置edgeInsets。

看到Customization of UINavigationBar and the back button

F.E.

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; 
[btn setBackgroundImage:[UIImage imageNamed:@"chk_back.png"] forState:UIControlStateNormal]; 
[btn addTarget:self action:@selector(BackBtn) forControlEvents:UIControlEventTouchUpInside]; 
UIView *customView = [[[UIView alloc] initWithFrame:CGRectMake(0,0, 50, 38)] autorelease]; 
btn.frame = CGRectMake(10, 3, 30, 32); // where you can set your insets 
[customView addSubview:btn]; 
    UIBarButtonItem *barBtn = [[UIBarButtonItem alloc] initWithCustomView:customView]; 

或者您也可以在酒吧後或befor您欄項目

UIBarButtonItem *fixedSpace = [[UIBarButtonItem alloc] 
        initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace 
             target:nil 
             action:nil]; 
[fixedSpace setWidth:20]; 

Answer 2

添加一些fixedSpace您可以更改rightBarButtonItem的imageInsets。

例如：

[viewController.navigationItem.rightBarButtonItem setImageInsets:UIEdgeInsetsMake(0, 0, 0, 50)];