一个通过监听键盘然后调整textField位置使之不会被键盘挡住的工具类 效果图如下：

inpired by TPKeyboardAvoiding

##Installation requires iOS5.0 or later

1, add the LXMKeyboardManager pod to your Podfile

pod 'LXMKeyboardManager', '~> 0.0.1'   

2, run pod install

3, import the LXMKeyboardManager.h header file, Typically, this should be written as #import <LXMKeyboardManager.h>

1, add LXMKeyboardManager.h and LXMKeyboardManager.m in your project
2, import the LXMKeyboardManager.h header file

1, init a keyboardManager in viewDidAppear like this:

if (!self.keyboardManager) {
    self.keyboardManager = [[LXMKeyboardManager alloc] initWithScrollView:self.scrollView];
}

2, call - (void)scrollToIdealPositionWithTargetView:(UIView *)argView; in UITextFieldDelegate method like this:

#pragma mark - UITextFieldDelegate
- (void)textFieldDidBeginEditing:(UITextField *)textField {
    [self.keyboardManager scrollToIdealPositionWithTargetView:textField];
}

if you have any problem, suggestion or other comment, just tell me and maybe we could work it out together

LXMKeyboardManager is available under the MIT license. See the LICENSE file for more info.