点击空白区域收回软键盘
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
if (![self.txtField isExclusiveTouch]) {
[self.txtField resignFirstResponder];
}
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
if (![self.txtField isExclusiveTouch]) {
[self.txtField resignFirstResponder];
}