如何在MFMailComposer Controller中设置导航项的图像（如发送按钮）

Question

我想在MFMailComposer Controller中设置导航项目的图像（发送按钮），然后我编写代码。

[picker.navigationItem.rightBarButtonItem setImage：[UIImage imageNamed：@“sendbutton.png”]];

但它并没有改变它。我改变becoz我的发送按钮使用此代码不工作..

   UIBarButtonItem *sendBtn=picker.navigationBar.topItem.rightBarButtonItem;
   UIButton *btn2=[UIButton buttonWithType:UIButtonTypeCustom];
   btn2.frame=CGRectMake(280, 2, 55, 30);
   [btn2 setImage:[UIImage imageNamed:@"images (2).jpeg"]forState:UIControlStateNormal];
   btn2.backgroundColor=[UIColor clearColor];
   [btn2 addTarget:sendBtn.target action:sendBtn.action forControlEvents:UIControlEventTouchUpInside];
   UIBarButtonItem *btnTemp2=[[UIBarButtonItem alloc]initWithCustomView:btn2];
   [[[[picker viewControllers]lastObject] navigationItem] setRightBarButtonItem:btnTemp2];

但我的取消按钮有代码

UIBarButtonItem *cancelBtn= picker.navigationBar.topItem.leftBarButtonItem; UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeCustom]; btn1.frame = CGRectMake(20, 2, 60, 30); [btn1 setImage:[UIImage imageNamed:@"btn_tellAFriend_cancel@2x.png"]forState:UIControlStateNormal];
btn1.backgroundColor=[UIColor clearColor]; [btn1 addTarget:cancelBtn.target action:cancelBtn.action forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *btnTemp = [[UIBarButtonItem alloc] initWithCustomView:btn1];
[[[[picker viewControllers] lastObject] navigationItem] setLeftBarButtonItem:btnTemp]; [btnTemp release];

工作正常

Answer 1

MFMailComposeViewController发送按钮无法修改，不应根据苹果

进行更改

你唯一能做的就是更改MFMailComposeViewController导航栏色调颜色，这也会改变发送按钮的颜色

MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    [[picker navigationBar] setTintColor:[UIColor redColor]];

Answer 2

试试此代码。

[self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"navbar_logo.png"]];
[imageView sizeToFit];
imageView.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin |
                              UIViewAutoresizingFlexibleRightMargin |
                              UIViewAutoresizingFlexibleTopMargin |
                              UIViewAutoresizingFlexibleBottomMargin);
UIBarButtonItem *loadingView = [[UIBarButtonItem alloc] initWithCustomView:imageView];

loadingView.target = self;
self.navigationItem.rightBarButtonItem = loadingView;

[imageView release];
[loadingView release];