关于UITextView的几种回收键盘的方法

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。

代码如下：


- (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。
代码如下：


#pragma mark - UITextView Delegate Methods   
-(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。

代码如下：


 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];  
}