更改導航項目的背景並添加圖像

Question

我有一個根視圖控制器，我需要知道如何將它的藍色背景更改爲圖像或更改其顏色，還希望將圖像添加到其右側。 例如，在下面的圖像中，我需要將文本根視圖控制器的背景更改爲另一個圖像或更改其顏色，並在根視圖控制器文本的右側添加一個小圖標。我應該怎麼做呢？我已經通過Change Navigation bar Background image on each navigation，但仍然無法實現它。

AppDelegate.h

#import <UIKit/UIKit.h> 

@interface AppDelegate : UIResponder <UIApplicationDelegate> 

@property (strong, nonatomic) UIWindow *window; 

@end 

Viewcontroller.h

#import <UIKit/UIKit.h> 

@interface ViewController : UIViewController 

@end 

​​

Answer 1

嘗試將這些代碼放入ViewWillAppear/ViewDidAppear/didFinishLaunchingWithOptions（在appDelegate的情況下）。

1）navigationItem.titleView = [[UIImageView alloc] initWithImage: [UIImage imageNamed:@"urtitlebar.png"]];

OR

2）

UIView *myView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 44)]; 
UIImageView *image = [[UIImageView alloc]initWithImage:[UIImage  imageNamed:@"urtitlebar.png"]]; 
[image setFrame:CGRectMake(0, 0, 44, 44)]; 
[myView addSubview:image]; 
[self.navigationController.navigationBar addSubview:myView]; 

OR

3）

UINavigationBar *navBar = self.navigationController.navigationBar; 
UIImage *image = [UIImage imageNamed:@"urtitlebar.png"]; 
[navBar setBackgroundImage:image]; 

EDIT：（如果你正在使用舊版本的SDK 3.2.5說）

創建的UINavigationBar子視圖和覆蓋調用的方法 - drawRect:(CGRect)rect用，

@implementation UINavigationBar (BackgroundImage) 

- (void)drawRect:(CGRect)rect 
{ 
    UIImage *navBarImage; 


     image = [UIImage imageNamed: @"urNavigationBar.png"]; 
    } 
    [navBarImage drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; 
} 

@end

Answer 2

嘗試導航欄上的這段代碼在AppDelegate.m的didFinishLaunchingWithOptions自定義圖像。

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"yourImageName.png"] forBarMetrics:UIBarMetricsDefault]; 

您還可以添加自定義按鈕作爲欄按鈕。

// create a custom button in viewDidLoad of your ViewController in which you want to place a custom bar button 
UIButton *customBackBtn =[[UIButton alloc] init]; 
[customBackBtn setBackgroundImage:[UIImage imageNamed:@"yourImage.png"] forState:UIControlStateNormal]; 
customBackBtn.frame = CGRectMake(100, 100, 52, 31); 

// set this customized button as BarButton 
UIBarButtonItem *backBtn =[[UIBarButtonItem alloc] initWithCustomView:customBackBtn]; 
[customBackBtn addTarget:self action:@selector(goBack) forControlEvents:UIControlEventTouchUpInside]; 
self.navigationItem.leftBarButtonItem = backBtn; 

就是這樣。