一、常规用法

 AppDelegate里倒入头文件即可使用
 #import <IQKeyboardManager/IQKeyboardManager.h>


    IQKeyboardManager *manager = [IQKeyboardManager sharedManager];
    //控制整个功能是否启用。
    manager.enable = YES;
    //控制点击背景是否收起键盘
    manager.shouldResignOnTouchOutside = YES;
    //控制键盘上的工具条文字颜色是否用户自定义。  注意这个颜色是指textfile的tintcolor
    manager.shouldToolbarUsesTextFieldTintColor = YES;
    //中间位置是否显示占位文字
    manager.shouldShowTextFieldPlaceholder = YES;
    //设置占位文字的字体
    manager.placeholderFont = [UIFont boldSystemFontOfSize:17];
    //控制是否显示键盘上的工具条。
    manager.enableAutoToolbar = YES;
    //某个类中禁止使用工具条
    [[IQKeyboardManager sharedManager]disableToolbarInViewControllerClass:[UIViewController class]];

二、某个页面禁止使用

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    IQKeyboardManager *keyboardManager =  [IQKeyboardManager sharedManager];
    keyboardManager.enable = NO;
    keyboardManager.enableAutoToolbar = NO;
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    IQKeyboardManager *keyboardManager =  [IQKeyboardManager sharedManager];
    keyboardManager.enable = YES;
    keyboardManager.enableAutoToolbar = YES;
}

三、设置偏移距离，比如不遮挡登录按钮

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [[IQKeyboardManager sharedManager]setKeyboardDistanceFromTextField:60];
}
- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [[IQKeyboardManager sharedManager]setKeyboardDistanceFromTextField:10];
}

参考：https://www.jianshu.com/p/46973f993824
https://www.jianshu.com/p/a3e4ec21c168