Iphone 在xcode中将图像添加到导航栏?
我在xib中添加了导航栏和导航项。现在我需要将图像添加到导航栏的左侧,但它没有被添加。 这是我正在研究的代码:Iphone 在xcode中将图像添加到导航栏?,iphone,xcode,uinavigationbar,Iphone,Xcode,Uinavigationbar,我在xib中添加了导航栏和导航项。现在我需要将图像添加到导航栏的左侧,但它没有被添加。 这是我正在研究的代码: - (void)viewDidLoad { UIImage *image = [UIImage imageNamed: @"i_launcher.png"]; UIImageView *imageView = [[UIImageView alloc] initWithImage: image]; self.navigationItem.titleView = image
- (void)viewDidLoad
{
UIImage *image = [UIImage imageNamed: @"i_launcher.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage: image];
self.navigationItem.titleView = imageView;
[imageView release];
}
我不明白为什么图像没有被添加。我如何添加它?尝试设置图像视图。框架也请交叉检查初始化的图像
UIImage *image = [UIImage imageNamed: @"i_launcher.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage: image];
imageView.frame.origin.x = 30.0; // You will have to find suitable values for the origin
imageView.frame.origin.y = 5.0;
self.navigationItem.titleView = imageView;
[imageView release];
你的代码看起来不错。但我不知道为什么需要在xib中添加导航栏和项。如果您从UIViewController创建自己的视图控制器,则它包含导航栏。您可以尝试从xib中删除自己添加的导航栏和项目,看看会发生什么 如果要在基于视图的应用程序的第一个视图上显示导航栏,需要修改应用程序类代码,如下所示:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[TestViewController alloc] initWithNibName:@"TestViewController" bundle:nil];
// REMOVE THIS LINE !!!!!!!!!!!!!
//self.window.rootViewController = self.viewController;
// ADD BELOW TWO LINES !!!!!!!!!!!!!!!!!!!!!!!
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:self.viewController];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
return YES;
}
我只是做了如下测试:
viewDidLoad:
方法中添加此代码
self.navigationItem.titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourimage.png"]];
UIBarButtonItem * item = [[UIBarButtonItem alloc] initWithCustomView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourimage2.jpg"]]];
self.navigationItem.rightBarButtonItem = item;
而且,若你们想在导航栏的背景中直接设置图像,那个么使用下面的行
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"i_launcher.png"] forBarMetrics:UIBarMetricsDefault];
另请参见此链接
我希望这能帮助你…我希望这能帮助你。如果不工作,请检查您的图像名称是否正确
- (void)viewDidLoad
{
UIImage *image = [UIImage imageNamed:@"Your Image"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(5, 10, 72, 19);
[self.navViewController.navigationBar addSubview:imageView];
}
UIImage *yourimage = [UIImage imageNamed: @"i_launcher.png"];
UIButton *buttonBarButton = [ UIButton buttonWithType:UIButtonTypeCustom];
buttonBarButton.frame = CGRectMake(0, 0,yourimage.size.width,yourimage.size.height);
[buttonBarButton setBackgroundImage:yourimage forState:UIControlStateNormal];
[buttonBarButton addTarget:nil action:nil forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *buttonBarButtonItem = [[[UIBarButtonItem alloc]initWithCustomView:buttonBarButton] autorelease];
self.navigationItem.leftBarButtonItem = buttonBarButtonItem;
如果您希望添加操作,则表示:
[buttonBarButton addTarget:self action:@selector(your function) forControlEvents:UIControlEventTouchUpInside];
如果要在导航栏中的特定点设置图像,则可以创建视图,然后将图像添加到视图中,调整图像边框,然后将此视图添加到导航栏中
UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
UIImageView *image = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"Default.png"]];
[image setFrame:CGRectMake(0, 0, 44, 44)];
[view addSubview:image];
[self.navigationController.navigationBar addSubview:view];
如果您要从xib添加导航栏,则只需为您的UINavigationBar创建IBOutlet
,然后在xib中连接它
[myNavigationBar addSubview:view];
要在移动到另一个控制器之间隐藏/显示图像,请执行以下操作。相应地调整尺寸
将其添加到头文件:
@property (weak, nonatomic) UIImageView *navBarLogo;
将此添加到.m控制器文件:
- (void)viewWillAppear:(BOOL)animated {
UIImage *image = [UIImage imageNamed:@"image_name.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(53, 7, 210, 30);
self.navBarLogo = imageView;
[self.navigationController.navigationBar addSubview:imageView];
}
- (void)viewWillDisappear:(BOOL)animated {
[self.navigationController.navigationBar sendSubviewToBack:self.navBarLogo];
}
看起来这是一个老问题,有一个公认的答案。不过,我想补充一点:
至少在Xcode 5中,如果您使用的是故事板,则可以通过将空视图拖动到标题区域,然后将ImageView放置在空视图中,将图像添加为导航栏的标题
下面的屏幕截图可以让您了解它的外观:
对于Swift 4:
override func viewDidAppear(_ animated: Bool) {
// 1
let nav = self.navigationController?.navigationBar
// 2
nav?.barStyle = UIBarStyle.black
nav?.tintColor = UIColor.yellow
// 3
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.contentMode = .scaleAspectFit
// 4
let image = UIImage(named: "Apple_Swift_Logo")
imageView.image = image
// 5
navigationItem.titleView = imageView
}
检查我的答案获取错误的可能重复:表达式在此行imageView.frame.origin.x=30.0不可赋值;喜欢这个UIImage*image=[UIImage imagename:@“i_launcher.png”];UIImageView*imageView=[[UIImageView alloc]initWithImage:image];imageView.frame=CGRectMake(0,0,50,50);//您必须为origin self.navigationItem.titleView=imageView找到合适的值;[图像视图发布];仍然无法添加d图像?但我看不到导航栏在运行基于视图的应用程序时自动添加,除非我从外部添加。因此,我已将外部添加到我的视图控制器中。我已添加了相应的代码。我刚刚测试了那些代码,它可以工作。我添加了你的代码,然后在视图控制器中添加了我的代码。它仍然没有向meDid显示任何导航栏。你从xib中删除了你自己添加的导航栏吗?是的,我删除了它。它是一个基于视图的应用程序。我在Appdelegate中添加了你的代码。m@Esha查看此链接如何在iphone应用程序的uinavigationbar中添加图像我已经在ViewDidLoad中添加了它我遇到了错误:“程序中出现意外@。。等等..我应该在哪里添加它?就在@implementation yourViewController类的上面,在类之外code@Esha根据您的要求创建图像,并将此图像添加为导航栏的背景,并使用我的第二个代码设置背景图像尝试此…我得到了您的代码,因为此代码正在工作:@implementation UINavigationBar(CustomImage)-(void)drawRect:(CGRect)rect{CGRect currentRect=CGRectMake(0,0100,45);UIImage*image=[UIImage ImageName:@“ic_launcher.png”];[image drawInRect:currentRect];}@end.No我不明白。正如我说过的,我通过xib添加了导航栏,所以这些代码没有被识别。。。。
override func viewDidAppear(_ animated: Bool) {
// 1
let nav = self.navigationController?.navigationBar
// 2
nav?.barStyle = UIBarStyle.black
nav?.tintColor = UIColor.yellow
// 3
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.contentMode = .scaleAspectFit
// 4
let image = UIImage(named: "Apple_Swift_Logo")
imageView.image = image
// 5
navigationItem.titleView = imageView
}