iOS在输入框键盘收起时，页面整体上移，露出了底部的黑底，目测一下，上移的高度大约是顶部的状态栏加导航条的高度，应该是键盘收起后navigationBar.translucent改变导致的。

image.png

image.png

解决方案：

• OC代码

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [IQKeyboardManager sharedManager].enable = NO;
    [self.searchTitleView.searchBar becomeFirstResponder];
}

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

• Swift代码

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        IQKeyboardManager.shared().isEnabled = false
        searchTitleView.searchBar.becomeFirstResponder()
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        IQKeyboardManager.shared().isEnabled = true
    }