我如何自定义导航返回按钮在iOS 7及以上没有标题?(即只使用箭头)
self.navigationItem.leftBarButtonItem = self.editButtonItem;
我只是想知道它们是否有self。backbuttonitem;
OR
像这样的东西?
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemBACK
target:self action:@selector(back)];
当前回答
你可以用这个。这对我来说是完美的，只是添加一个UIButton作为UIBarButtonItem的定制视图。
试试下面的代码
self.navigationItem.leftBarButtonItem=[self backButton];
- (UIBarButtonItem *)backButton
{
UIImage *image = [UIImage imageNamed:@"back-btn.png"];
CGRect buttonFrame = CGRectMake(0, 0, image.size.width, image.size.height);
UIButton *button = [[UIButton alloc] initWithFrame:buttonFrame];
[button addTarget:self action:@selector(backButtonPressed) forControlEvents:UIControlEventTouchUpInside];
[button setImage:image forState:UIControlStateNormal];
UIBarButtonItem *item= [[UIBarButtonItem alloc] initWithCustomView:button];
return item;
}
其他回答
检查这个答案
如何更改UINavigationController返回按钮名称?
设置标题文本为字符串，其中有一个空格，如下所示
title = " "
没有足够的声誉来添加评论:)
如果你设置了导航栏的tintColor，添加一个没有标题的自定义后退按钮图像，该图像的tintColor将反映图像的颜色。请点击苹果文档链接。
https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/UIKitUICatalog/index.html#//apple_ref/doc/uid/TP40012857-UIView-SW7
UINavigationItem *navItem = [[UINavigationItem alloc] init];
navBar.tintColor = self.tintColor;
UIImage *myImage = [UIImage imageNamed:@"left_arrow.png"];
myImage = [myImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithImage:myImage style:UIBarButtonItemStylePlain target:self action:@selector(cancelButtonFunction:)];
navItem.leftBarButtonItem = leftButton;
navBar.items = @[ navItem ];
目标: 自定义UINavigationBar上的所有后退按钮为白色图标
步骤: 1. 在AppDelete的didFinishLaunchingWithOptions方法中:
UIImage *backBtnIcon = [UIImage imageNamed:@"navBackBtn"];
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
[UINavigationBar appearance].tintColor = [UIColor whiteColor];
[UINavigationBar appearance].backIndicatorImage = backBtnIcon;
[UINavigationBar appearance].backIndicatorTransitionMaskImage = backBtnIcon;
}else{
UIImage *backButtonImage = [backBtnIcon resizableImageWithCapInsets:UIEdgeInsetsMake(0, backBtnIcon.size.width - 1, 0, 0)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -backButtonImage.size.height*2) forBarMetrics:UIBarMetricsDefault];
}
2.在普通超级ViewController类的viewDidLoad方法中:
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@""
style:UIBarButtonItemStylePlain
target:nil
action:nil];
[self.navigationItem setBackBarButtonItem:backItem];
}else{
//do nothing
}
改变backItem。title = "" to使用topItem。标题= "" 设置navigationItem。hidesBackButton = true & navigationItem。leftBarButtonItem将失去后退手势 记住，我们必须创建2个back映像的实例
我的解决方案将改变图像和保持后面的手势:
navigationController?.navigationBar.backIndicatorImage = UIImage(named: "back")
navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "back")
navigationController?.navigationBar.topItem?.title = ""
唯一对我有效的方法是:
navigationController?.navigationBar.backItem?.title = ""
更新:
当我改变segue动画标志为真(之前是假的)，唯一适合我的方法是:
navigationController?.navigationBar.topItem?.title = ""
