UIWebView设置图片的宽度适应屏幕的大小

#import "ViewController.h"

@interface ViewController ()<UIWebViewDelegate>

@property (weak, nonatomic) IBOutletUIWebView *webView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [superviewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)uiConfig
{
    self.webView.delegate =self;
}

#pragma mark - 设置图片的宽度适应屏幕的大小
- (void)setWebViewHtmlImageFitPhone
{
    CGFloat width = [[UIScreenmainScreen]bounds].size.width;
    
    NSString *jsStr = [NSStringstringWithFormat:@"var script = document.createElement('script');"
                     "script.type = 'text/javascript';"
                     "script.text = \"function ResizeImages() { "
                     "var myimg,oldwidth;"
                     "var maxwidth = '%f';" //自定义宽度
                     "for(i=0;i <document.images.length;i++){"
                     "myimg = document.images[i];"
                     "if(myimg.width > maxwidth){"
                     "oldwidth = myimg.width;"
                     "myimg.width = maxwidth;"
                     "}"
                     "}"
                     "}\";"
                     "document.getElementsByTagName('head')[0].appendChild(script);",width];
    [_webViewstringByEvaluatingJavaScriptFromString:jsStr];
    [_webViewstringByEvaluatingJavaScriptFromString:@"ResizeImages();"];
}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    return YES;
}
- (void)webViewDidStartLoad:(UIWebView *)webView
{
    NSLog(@"开始加载");
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSLog(@"加载完成");
    [selfsetWebViewHtmlImageFitPhone];
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(nullableNSError *)error
{
    NSLog(@"加载失败 error == %@",error);
}

- (void)didReceiveMemoryWarning {
    [superdidReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end