向UINavigationController子类添加按钮

Question

我正在尝试创建UINavigationController的可重用子类。所以这是我的代码：

    @interface MainNavigationController : UINavigationController
...
- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationBar.barTintColor = primaryOrange;
    self.navigationBar.tintColor = white;

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"search"] style:UIBarButtonItemStylePlain target:self action:nil];
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"menu"] style:UIBarButtonItemStylePlain target:self action:nil];


}

因此导航栏的颜色正在改变但是没有出现按钮的问题  我错过了什么？

更新 我希望在我的图像中为NavigationController提供相同的NavigationController（按钮和颜色...）：

更新 所以我用这种方式将navugationController子类化：

-(void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
    viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"search"] style:UIBarButtonItemStylePlain target:self action:nil];
    viewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"menu"] style:UIBarButtonItemStylePlain target:self action:@selector(showMainMenu)];

}

- (id)initWithRootViewController:(UIViewController *)rootViewController {
    self = [super initWithRootViewController:rootViewController];
    if (self) {
        rootViewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"search"] style:UIBarButtonItemStylePlain target:self action:nil];
        rootViewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"menu"] style:UIBarButtonItemStylePlain target:self action:@selector(showMainMenu)];


    }
    return self;
}

这项工作但唯一的问题是，当我按下视图而不是左边有后退按钮时，我会得到始终搜索图标，如何修复它（我想在左边有父级搜索按钮，后面有按钮孩子的观点）？

Answer 1

子类设计应该是这样的 -

void CSelectTestDefinitionDlg::OnNMCustomdraw(NMHDR* pNMHDR, LRESULT* pResult)
{
    LPNMLVCUSTOMDRAW lpLVCustomDraw = reinterpret_cast<LPNMLVCUSTOMDRAW>(pNMHDR);
    switch (lpLVCustomDraw->nmcd.dwDrawStage)
    {
    case CDDS_ITEMPREPAINT:
    case CDDS_SUBITEM:
        if (lpLVCustomDraw->nmcd.uItemState & CDIS_SELECTED)
        {
            // Your color definitions here:
            lpLVCustomDraw->clrText = RGB(255, 255, 255);
            lpLVCustomDraw->clrTextBk = RGB(0, 70, 60);
        }
        break;

    default:
        break;
    }

    *pResult = 0;
    *pResult |= CDRF_NOTIFYPOSTPAINT;
    *pResult |= CDRF_NOTIFYITEMDRAW;
    *pResult |= CDRF_NOTIFYSUBITEMDRAW;
}

按要求提供完整代码 -

- (id)initWithRootViewController:(UIViewController *)rootViewController {
    self = [super initWithRootViewController:rootViewController];
    if (self) {
        [self setLeftButtonToController:rootViewController];
    }
    return self;
}

- (void)setLeftButtonToController:(UIViewController *)viewController {
    UIBarButtonItem *closeItem = [[UIBarButtonItem alloc] initWithTitle:@"Close" style:UIBarButtonItemStylePlain target:self action:@selector(dismissController)];
    [viewController.navigationItem setRightBarButtonItem:closeItem];
}

如何使用 -

//
//  MyOwnNavigationController.h
// 
//


#import <UIKit/UIKit.h>

@interface MyOwnNavigationController : UINavigationController
- (id)initWithRootViewController:(UIViewController *)rootViewController;
@end



//
//  MyOwnNavigationController.m
// 
//


#import "MyOwnNavigationController.h"

@interface MyOwnNavigationController ()

@end

@implementation MyOwnNavigationController



- (id)initWithRootViewController:(UIViewController *)rootViewController {
    self = [super initWithRootViewController:rootViewController];
    if (self) {
        [self setLeftButtonToController:rootViewController];
    }
    return self;
}

- (void)setLeftButtonToController:(UIViewController *)viewController {
    UIBarButtonItem *closeItem = [[UIBarButtonItem alloc] initWithTitle:@"Close" style:UIBarButtonItemStylePlain target:self action:@selector(dismissController)];
    [viewController.navigationItem setRightBarButtonItem:closeItem];
}


@end

对于StoryBroad的

更新 ---- 将以下方法添加到MyOwnNavigationController.m

TwoViewController * viewController = [[TwoViewController alloc] initWithNibName:@"TwoViewController" bundle:nil];
    MyOwnNavigationController *navController = [[MyOwnNavigationController alloc] initWithRootViewController:viewController];