IOS 在键盘顶部添加自定义按键

UIToolbar *topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)];
[topView setBarStyle:UIBarStyleDefault];

UIBarButtonItem *myBn = [[UIBarButtonItem alloc] initWithTitle:@"动作1" style:UIBarButtonItemStyleBordered target:self action:nil];
UIBarButtonItem* spaceBn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:self action:nil];
UIBarButtonItem *doneBn = [[UIBarButtonItem alloc]initWithTitle:@"完成" style:UIBarButtonItemStyleDone target:self action:@selector(editFinish)];

NSArray *buttonArray = [NSArray arrayWithObjects:myBn,spaceBn,doneBn, nil];
[topView setItems:buttonArray];
[self.textFiled setInputAccessoryView:topView];

-(void)editFinish
{
[self.textFiled resignFirstResponder];
}