Question

我有一个问题，我现在无法找到解决方案。在我的应用程序中，我的导航栏中有多个按钮，这些按钮在整个应用程序中都是必需的，而不是在每个视图控制器中创建按钮，我想创建一个UINavigationBar或UINavigationController的子类（我不知道哪一个）。因此，无论何时用户在视图之间移动，导航栏始终包含这些按钮。到目前为止，我一直在搜索这个但是没有找到任何值得的东西。请提前告诉我一个方法，谢谢。

Answer 1

#import "CustomNavBar.h"

@implementation CustomNavBar

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        self.tintColor=[UIColor greenColor];
    }
    return self;
}
- (void)drawRect:(CGRect)rect {
    UIImage *image = [UIImage imageNamed:@"Custom-Nav-Bar-BG.png"];
    [image drawInRect:CGRectMake(0, 0, 40, self.frame.size.height)];

    UIButton *btn=[UIButton buttonWithType:UIButtonTypeContactAdd];
    [btn drawRect:CGRectMake(42, 0, 40, self.frame.size.height )];

    UIButton *btn2=[UIButton buttonWithType:UIButtonTypeContactAdd];
    [btn2 drawRect:CGRectMake(82, 0, 40, self.frame.size.height )];
}


@end

Answer 2

您可以subClass标准UINavigationBar来实现此目标

@interface CustomNavigationBar : UINavigationBar

- (id)initWithFrame:(CGRect)frame;

@end

@implementation CustomNavigationBar

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

        UIButton *btn=[UIButton buttonWithType:UIButtonTypeContactAdd];
        [btn addTarget:self action:@selector(<#selector#>) forControlEvents:<#(UIControlEvents)#>]
        [self addSubview:btn];

        ...
        ...


    }
    return self;
}
- (void)drawRect:(CGRect)rect {

    [[UIColor redColor] setFill];
    UIRectFill(rect);
}

@end

要使用此StoryBoard或xib，只需将标准班级名称更改为CustomNavigationBar。

或

如果您想以编程方式使用

在AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]]; UINavigationController *navVC = [[UINavigationController alloc] initWithNavigationBarClass:[CustomNavigationBar class] toolbarClass:nil]; UIStoryboard *mStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil]; ViewController *VC1 = [mStoryboard instantiateViewControllerWithIdentifier:@"VC"]; [navVC setViewControllers:[NSArray arrayWithObject:VC1] animated:NO]; [self. window setRootViewController:navVC]; [self. window makeKeyAndVisible]; return YES; }

ios6和ios7中的自定义导航栏

2 个答案: