IOS 调用系统键盘 设置搜索字段和事件

其实说白了，就是将系统的return 键换成搜索，然后对renturn 事件作处理

通过红色的设置，就可以在系统键盘（系统键盘或者搜狗输入法）上显示“搜索”字段了。

 UIImageView *_seachView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"search"]];    _seachView.frame = CGRectMake(15, 50, 10, 10);    _searchTextField = [self generateTextField];    _searchTextField.placeholder = @"  请输入司机的卡号或手机号";    [_searchTextField setFrame:CGRectMake(15, 0, kDEVICEWIDTH - 100, 30)];    _searchTextField.leftView = _seachView;    _searchTextField.layer.borderColor = ([[CHUtil colorWithHexString:@"c7c7c9"]CGColor]);    [_searchTextField setValue:[CHUtil colorWithHexString:@"c5c5c5"] forKeyPath:@"_placeholderLabel.textColor"];    [_searchTextField addTarget:self action:@selector(searchTextFieldChangeAction:)               forControlEvents:UIControlEventEditingChanged];   <span style="color:#ff0000;"> _searchTextField.returnKeyType = UIReturnKeySearch; //设置按键类型    _searchTextField.enablesReturnKeyAutomatically = YES; //这里设置为无文字就灰色不可点</span>        [_contentView addSubview:_searchTextField];

获取搜索的点击事件：红色就是处理搜索点击的事件。

#pragma mark -- UITextFieldDelegate method-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    [self resignTextResponder];}<span style="color:#ff0000;">- (BOOL)textFieldShouldReturn:(UITextField *)textField{    [self resignTextResponder];        if(textField.returnKeyType==UIReturnKeySearch)    {        if ([_searchTextField.text length] > 0)        {            [self dealWithSearchText:_searchTextField.text];        }    }    return YES;}</span>- (void)resignTextResponder{    if ([_searchTextField isFirstResponder])    {        [_searchTextField resignFirstResponder];    }}