//点击键盘的回车键
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([string isEqualToString:@"\n"]) {
//在这里写你当你点击回车键时执行的事件
return NO;
}
return YES;
}原文：http://blog.csdn.net/u013243469/article/details/41681665