UITextView回收或关闭键盘

iOS开发中,发现UITextView没有像UITextField中textFieldShouldReturn:这样的方法,那么要实现UITextView关闭键盘,就必须使用其他的方法,下面是可以使用的几种方法。

1.如果你程序是有导航条的,可以在导航条上面加多一个Done的按钮,用来退出键盘,当然要先实UITextViewDelegate。

- (void)textViewDidBeginEditing:(UITextView *)textView {     UIBarButtonItem *done =   [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(leaveEditMode)] autorelease];     self.navigationItem.rightBarButtonItem = done;      }    - (void)textViewDidEndEditing:(UITextView *)textView {      self.navigationItem.rightBarButtonItem = nil;  }    - (void)leaveEditMode {      [self.textView resignFirstResponder];  }  2.如果你的textview里不用回车键,可以把回车键当做退出键盘的响应键。
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text  {      if ([text isEqualToString:@"\n"]) {          [textView resignFirstResponder];          return NO;      }      return YES;  }  这样无论你是使用电脑键盘上的回车键还是使用弹出键盘里的return键都可以达到退出键盘的效果。
3.第三种方法感觉效果比上面两种都好,就是在弹出的键盘上面加一个view来放置退出键盘的Done按钮。
UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)];      [topView setBarStyle:UIBarStyleBlack];            UIBarButtonItem * helloButton = [[UIBarButtonItem alloc]initWithTitle:@"Hello" style:UIBarButtonItemStyleBordered target:self action:nil];            UIBarButtonItem * btnSpace = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];            UIBarButtonItem * doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyBoard)];            NSArray * buttonsArray = [NSArray arrayWithObjects:helloButton,btnSpace,doneButton,nil];      [doneButton release];      [btnSpace release];      [helloButton release];            [topView setItems:buttonsArray];      [tvTextView setInputAccessoryView:topView];    -(IBAction)dismissKeyBoard  {      [tvTextView resignFirstResponder];  }