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将随机大小的图像放入 UIWebview (IOS)

沃梦达教程移动开发问题

2022-01-01

Fit image of random size into a UIWebview (IOS)(将随机大小的图像放入 UIWebview (IOS))

本文介绍了将随机大小的图像放入 UIWebview (IOS)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想将大图像放入 UIwebview 并保持图像比例与图像视图相同.

I want to fit large image into UIwebview with keeping image ratio same as image view.

我该怎么做?

我的代码如下以适合 Uiwebview 中的图像.如果图像很大，那么显示效果不好.

My code as follows to fit image in Uiwebview. if image is large then display is not good.

                CGFloat screenWidth = self.view.frame.size.width;
                CGFloat screenHeight = self.view.frame.size.height;

                NSString *htmlString = [NSString stringWithFormat:@"%@", @"<html><head><meta name='viewport' content='user-scalable=yes,width=device-width'></head><body bgcolor='000000'><img src='%@' width='%f' height='%f' style='max-width:200% max-height:200%'></body></html>"];
                imageHTML  = [[NSString alloc] initWithFormat:htmlString, fileUrl, screenWidth, screenHeight];

        [Webview loadHTMLString:imageHTML baseURL:nil];
        [imageHTML release];

推荐答案

我用过下面的代码，效果很好.

   NSString *imageHTML = [[NSString alloc] initWithFormat:@"%@%@%@", @"<!DOCTYPE html>"
                                 "<html lang="ja">"
                                 "<head>"
                                 "<meta charset="UTF-8">"
                                 "<style type="text/css">"
                                 "html{margin:0;padding:0;}"
                                 "body {"
                                 "margin: 0;"
                                 "padding: 0;"
                                 "color: #363636;"
                                 "font-size: 90%;"
                                 "line-height: 1.6;"
                                 "background: black;"
                                 "}"
                                 "img{"
                                 "position: absolute;"
                                 "top: 0;"
                                 "bottom: 0;"
                                 "left: 0;"
                                 "right: 0;"
                                 "margin: auto;"
                                 "max-width: 100%;"
                                 "max-height: 100%;"
                                 "}"
                                 "</style>"
                                 "</head>"
                                 "<body id="page">"
                                 "<img src='",fileUrl,@"'/> </body></html>"];

                [wview_contents loadHTMLString:imageHTML baseURL:nil];

这篇关于将随机大小的图像放入 UIWebview (IOS)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！

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