我想在SLComposeServiceViewController中更改帖子按钮的标题。 我设法得到了UIButton:
NSArray* subviews =[self.navigationController.navigationBar subviews];
UIButton* postButton =[subviews lastObject];
我尝试设置这样的标题:
[postButton setTitle:@"Save" forState:UIControlStateNormal];
但标题没有改变。
任何人都可以帮我吗?
我在iPad上看到了Evernote的扩展分享,它看起来像这样:
更新
我的解决方案:
我找到了问题的解决方案,我删除了原始导航栏并创建了自定义导航栏。
我有两个导航栏: 1."取消" \"保存"纽扣 2." back"按钮
我在导航到其他viewcontroller时更改了它们 (在我的情况下,我需要上传文件,用户需要从列表中选择位置)
注意:如果您未实施configurationItems
,则只需要第一个导航栏。 (只需拨打viewDidAppear
所以我的代码在这里:
@property (strong, nonatomic) UINavigationBar *customNavBar;
-(void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.customNavBar = [[UINavigationBar alloc] initWithFrame:self.navigationController.navigationBar.bounds];
[self.navigationController.navigationBar removeFromSuperview];
[self.navigationController.view addSubview:self.customNavBar];
[self setCancelSaveNavigationItem];
}
setCancelSaveNavigationItem - >从shareViewController的viewDidAppear调用
-(void)setCancelSaveNavigationItem
{
UINavigationItem *newItem = [[UINavigationItem alloc] init];
UIBarButtonItem *cancelBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Cancel",nil) style:UIBarButtonItemStylePlain target:self action:@selector(cancelButtonTapped:)];
UIBarButtonItem *saveBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Done",nil) style:UIBarButtonItemStyleDone target:self action:@selector(saveButtonTapped:)];
newItem.leftBarButtonItem = cancelBarButtonItem;
newItem.rightBarButtonItem = saveBarButtonItem;
[self.customNavBar setItems:@[newItem]];
[self.navigationItem setBackBarButtonItem:cancelBarButtonItem];
[self.navigationItem setRightBarButtonItem:saveBarButtonItem];
if(self.item.value == nil){
saveBarButtonItem.enabled = NO;
}
}
setBackNavigationItem - >在configurationItems
函数
self.item.tapHandler
- >中调用
-(void)setBackNavigationItem
{
UINavigationItem *newItem = [[UINavigationItem alloc] init];
UIBarButtonItem *selectBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Select",nil) style:UIBarButtonItemStylePlain target:self action:@selector(selectButtonTapped:)];
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:[NSString stringWithFormat:@"❮ %@", NSLocalizedString(@"Back",nil)] style:UIBarButtonItemStylePlain target:self action:@selector(backButtonTapped:)];
newItem.leftBarButtonItem = backBarButtonItem;
newItem.rightBarButtonItem = selectBarButtonItem;
[self.customNavBar setItems:@[newItem]];
[self.navigationItem setBackBarButtonItem:backBarButtonItem];
[self.navigationItem setRightBarButtonItem:selectBarButtonItem];
}
轻触手柄按钮:
- (void)backButtonTapped:(id)sender {
if([self.navigationController.viewControllers count] ==2){
[self setCancelSaveNavigationItem];
}
[self.navigationController popViewControllerAnimated:YES];
}
- (void)cancelButtonTapped:(id)sender {
[self cancel];
}
- (void)selectButtonTapped:(id)sender {
...
[self setCancelSaveNavigationItem];
[self popConfigurationViewController];
}
- (void)saveButtonTapped:(id)sender {
...
[self cancel];
}
它对我有用!!!
结果:
答案 0 :(得分:10)
只需viewDidAppear
self.navigationController?.navigationBar.topItem?.rightBarButtonItem?.title = "Save"
答案 1 :(得分:7)
您的代码:
NSArray* subviews =[self.navigationController.navigationBar subviews];
UIButton* postButton =[subviews lastObject];
...... 非常糟糕。它只能起作用,因为post按钮位于subviews
中,是数组中的最后一项。但subviews
的内容没有记录,可能随时更改。此外,由于此按钮没有公共API,因此完全有可能存在框架代码来阻止或覆盖对按钮文本的更改 - 所以即使我们假设您拥有正确的UI元素,您仍然可能无法更改它
Evernote的UI几乎可以肯定是一个完全自定义的设计,只有SLComposeServiceViewController
。使用SLComposeServiceViewController
不需要共享扩展名,这只是为了方便起见。如果它不能满足您的需求,请自行设计。
更新:出于好奇,我解开了Evernote IPA并查看EvernoteShare.appex
nm。没有提及SLComposeServiceViewController
,这证实了Evernote在其扩展中没有使用该类。