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我在 webview 中显示 html 字符串,内容还包括图像。点击图像会在整个 webview 中打开图像(覆盖整个 webview )。我无法返回主要内容。我怎样才能回来?是的,我也使用了 UIWebview 委托方法 goBack,但没有任何反应。