UINavigationBar上的图像大小

Question

我想将自定义图像放在我的UINavigationBar上，

当我尝试这两段代码片段时，

[self.navigationItem setTitleView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"logo.png"]]];

和

    UIButton *logoView = [[UIButton alloc] initWithFrame:CGRectMake(0,0,70,30)];
    [logoView setBackgroundImage:[UIImage imageNamed:@"logo.png"] forState:UIControlStateNormal];
    [logoView setUserInteractionEnabled:NO];
    self.navigationItem.titleView = logoView;

我可以在设备上看到的图像变得模糊或者拉伸了。

我制作的图像的分辨率为180*40（宽*高）

我想知道Image的确切大小。什么，会是什么？

提前致谢。

Answer 1

使用此

UIImageView *navigationImage=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 98, 34)];
navigationImage.image=[UIImage imageNamed:@"topNav-logo.png"];

UIImageView *workaroundImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 98, 34)];
    [workaroundImageView addSubview:navigationImage];
    self.navigationItem.titleView=workaroundImageView;

希望这会有所帮助。

Answer 2

创建尺寸（320 x 44）的图片，并将其设置为标题如下..

self.navigationItem.titleView = yourImageView;

请参阅下面的整个示例......

- (void)viewDidLoad{
        UIImageView* imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"logo.png"]];
        self.navigationItem.titleView = imgView;
        [imgView release];
}

Answer 3

您需要先初始化titleView。然后将imageView设置为subView：

UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"logo.png"]];

self.navigationItem.titleView = [[UIView alloc] initWithFrame:imageView.bounds];
[self.navigationItem.titleView addSubview:imageView];