iphone - 我可以更改导航栏项目的位置吗？

Question

截图如下:

代码在这里:

UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
leftButton.frame = CGRectMake(0.0f, 0.0f, 46.0f, 32.0f);
[leftButton setBackgroundImage:[UIImage imageNamed:@"navi_register_up.png"] forState:UIControlStateNormal];
[leftButton addTarget:self action:@selector(doRegister) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *leftBarItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton];
self.navigationItem.leftBarButtonItem = leftBarItem;
[leftBarItem release];

有什么方法可以将按钮向上移动一些像素吗？谢谢:)

Answer 1

您需要创建一个 UIBarButtonItem，系统项 UIBarButtonSystemItemFixedSpace 宽度为 -5，这将删除 5 px 填充。然后设置 leftBarButtonItems 与固定空间项目和你的后栏项目是这样的 -

UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
[negativeSpacer setWidth:-5];

self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:negativeSpacer,leftBarItem,nil];