如何在导航栏按钮项中添加自定义图像？

Question

 UIBarButtonItem *doneitem=[[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(donePressed:)]autorelease];
    self.navigationItem.rightBarButtonItem=doneitem;

这是我的应用程序的代码,我需要在此按钮上添加图像？

请帮我.

Answer 1

试试这段代码:

UIImage* image3 = [UIImage imageNamed:@"mail-48_24.png"];
CGRect frameimg = CGRectMake(0, 0, image3.size.width, image3.size.height);
UIButton *someButton = [[UIButton alloc] initWithFrame:frameimg];
[someButton setBackgroundImage:image3 forState:UIControlStateNormal];
[someButton addTarget:self action:@selector(sendmail)
     forControlEvents:UIControlEventTouchUpInside];
[someButton setShowsTouchWhenHighlighted:YES];

UIBarButtonItem *mailbutton =[[UIBarButtonItem alloc] initWithCustomView:someButton];
self.navigationItem.rightBarButtonItem=mailbutton;
[someButton release];

Answer 2

 UIBarButtonItem *_btn=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"XXXXXXX.png"] 
                                                  style:UIBarButtonItemStylePlain 
                                                  target:self 
                                                  action:@selector(yourMethod)];

self.navigationItem.rightBarButtonItem=_btn;

Answer 3

请尝试以下代码:

UIButton *btnNext1 =[[UIButton alloc] init];
[btnNext1 setBackgroundImage:[UIImage imageNamed:@"btnNext.png"] forState:UIControlStateNormal];

btnNext1.frame = CGRectMake(100, 100, 50, 30);
UIBarButtonItem *btnNext =[[UIBarButtonItem alloc] initWithCustomView:btnNext1];
[btnNext1 addTarget:self action:@selector(nextButtonClicked) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = btnNext;

Answer 4

UIButton *urButton = [UIButton buttonWithType:UIButtonTypeCustom];
urButton.frame = urRequiredFrame;
[urButton setImage:urImage forState:UIControlStateNormal];
[urButton addTarget:self action:@selector(donePressed:)
     forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *doneButton =[[UIBarButtonItem alloc] initWithCustomView:urButton];
self.navigationItem.rightBarButtonItem=doneButton;

Answer 5

万一有人需要Swift代码接受答案:

let infoImage = UIImage(named: "my-icon-32.png")
let imgWidth = infoImage?.size.width
let imgHeight = infoImage?.size.height
let button:UIButton = UIButton(frame: CGRect(x: 0,y: 0,width: imgWidth!, height: imgHeight!))
button.setBackgroundImage(infoImage, forState: .Normal)
button.addTarget(self, action: Selector("openInfo"), forControlEvents: UIControlEvents.TouchUpInside)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button)

PS Gurpreet Singh的答案仅适用于透明PNG,我还必须设置除clearColor之外的按钮tintcolor.