iphone - UIBarButtonItem中的按钮框架

我在UIBarButtonItem中只有一个带有图像的按钮。我想将其放置在屏幕中间，但是无法调整框架。请查看代码，任何潜在客户都是有用的。

- (void)viewDidLoad {
//self.navigationItem.hidesBackButton = NO;

[super viewDidLoad];



UIImage *emailImage = [UIImage imageNamed:@"Email_Button.png"];
UIButton *emailButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
emailButton.frame = CGRectMake(0, 0, 100, 30);
    [emailButton setImage:emailImage forState:UIControlStateNormal];



UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc]  initWithCustomView:emailButton];
//[aBarButtonItem setFrame:CGRectMake(100, 0, 100, 30)];

[emailButton addTarget:self action:@selector(sendEmail) forControlEvents:UIControlEventTouchUpInside];

NSMutableArray * arr = [NSMutableArray arrayWithObjects:aBarButtonItem, nil];
[[self navigationController] setToolbarHidden: NO animated:YES];
[self setToolbarItems:arr animated:YES];
}

谢谢

最佳答案

如果要在中间放置一个按钮，则可能应该使用两个“柔性空格键”按钮项，并在UIBarButtonItem的每一侧放置一个，这应具有您想要的效果...

像这样创造一个

UIBarButtonItem *flexible = [[UIBarButtonItem alloc] `initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]`

希望能帮助到你

关于iphone - UIBarButtonItem中的按钮框架，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/8219188/