代码没有起作用

Question

代码：
#pragma  -
#pragma  UITextViewDelegate- (void)doneEditting:(id)sender {

[textViewContent resignFirstResponder];
self.navigationItem.rightBarButtonItem = nil;
}- (void)textViewDidBeginEditing:(UITextView *)textView {

self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] 
                                               initWithTitle:@"Done" 
                                               style:UIBarButtonItemStyleDone 
                                               target:self 
   action:@selector(doneEditting:)] 
   autorelease];
}
没有在navigation bar上面添加一个文字为Done的按钮。
怎么回事呢？

Answer 1

你好~
系统自带《Done》按钮的~UIBarButtonItem *aItme = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneEditting:)];
self.navigationItem.rightBarButtonItem = aItem;
[aItem release];希望有所帮助