点击 UIWebViews 时键盘消失

Question

我有一些用于富文本编辑的 UIWebView。他们有一个 contentEditable 的 div。问题是，当在字段之间切换时，如果用户点击 UIWebView，键盘会瞬间消失。

从 UIWebView 转到原生 UITextView，键盘保持显示。

即使点击 not contentEditable 的 UIWebView，键盘也会消失。在这种情况下，我可以将 userInteractionEnabled 变为 false，但如果我希望它可滚动，那仍然行不通。

这是演示问题的 gif：

除了将以下 HTML 加载到 UIWebViews 中（第二个删除了 contentEditable）外，这背后没有任何特殊代码在进行

<!DOCTYPE html>
<html lang="ja">
    <head>
        <meta name="viewport" content="user-scalable=no">
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    </head>
    <body>
        <div id="editor" contentEditable="true"></div>
    </body>
</html>

Answer 1

据我所知，当键盘不再是第一响应者时，键盘将被关闭。您可以使用 ...shouldEndEditing: 方法，使其返回 NO 以保持键盘可见。

希望对您有所帮助

Answer 2

事实证明，在为这个问题和相关问题在互联网上搜索了一个星期之后，我最终发现了一个重复的问题！我正在从 this post by diegoreymendez.

重新发布相关代码

UIWebView+GUIFixes.h

#import <UIKit/UIKit.h>

@interface UIWebView (GUIFixes)

/**
 *  @brief      Wether the UIWebView will use the fixes provided by this category or not.
 */
@property (nonatomic, assign, readwrite) BOOL usesGUIFixes;

@end

UIWebView+GUIFixes.m

#import "UIWebView+GUIFixes.h"
#import <objc/runtime.h>

@implementation UIWebView (GUIFixes)

static const char* const fixedClassName = "UIWebBrowserViewMinusAccessoryView";
static Class fixClass = Nil;

- (UIView *)browserView
{
    UIScrollView *scrollView = self.scrollView;

    UIView *browserView = nil;
    for (UIView *subview in scrollView.subviews) {
        if ([NSStringFromClass([subview class]) hasPrefix:@"UIWebBrowserView"]) {
            browserView = subview;
            break;
        }
    }

    return browserView;
}

- (BOOL)delayedBecomeFirstResponder
{
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.01 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [super becomeFirstResponder];
    });

    return YES;
}

- (void)ensureFixedSubclassExistsOfBrowserViewClass:(Class)browserViewClass
{
    if (!fixClass) {
        Class newClass = objc_allocateClassPair(browserViewClass, fixedClassName, 0);
        objc_registerClassPair(newClass);

        IMP delayedFirstResponderImp = [self methodForSelector:@selector(delayedBecomeFirstResponder)];
        Method becomeFirstResponderMethod = class_getInstanceMethod(browserViewClass, @selector(becomeFirstResponder));
        method_setImplementation(becomeFirstResponderMethod, delayedFirstResponderImp);

        fixClass = newClass;
    }
}

- (BOOL)usesGUIFixes
{
    UIView *browserView = [self browserView];
    return [browserView class] == fixClass;
}

- (void)setUsesGUIFixes:(BOOL)value
{
    UIView *browserView = [self browserView];
    if (browserView == nil) {
        return;
    }

    [self ensureFixedSubclassExistsOfBrowserViewClass:[browserView class]];

    if (value) {
        object_setClass(browserView, fixClass);
    }
    else {
        Class normalClass = objc_getClass("UIWebBrowserView");
        object_setClass(browserView, normalClass);
    }

    [browserView reloadInputViews];
}

@end

不得不像这样处理 objc 运行时感觉很肮脏和脆弱，但据我所知，这是唯一可行的方法。

点击 UIWebViews 时键盘消失

Keyboard gets dismissed when tapping into UIWebViews

iphone

objective-c

uiwebview

ios

swift