编辑于 2019-03-04
iOS 8/9 系统 使用WKWebview ,针对本地加载HTML代码问题(loadHTMLString:baseURL:)
问题:加载本地图片
iOS 10以后 通过下面的代码可以解决加载本地图片
NSString *path = [[NSBundle mainBundle] resourcePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[self.webView loadHTMLString:HtmlString baseURL:baseURL];
iOS 8/9 系统 :
NSURL *temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];
[self.webView loadHTMLString:HtmlString baseURL:temDirURL];
iOS 8/9 系统需要将本地资源copy 一份到 沙盒下的tmp文件夹下:
//将图片资源copy 到 tmp 文件夹下
- (void)copyResourcesToTMPFolder{
//js文件
[self copyResourcesToTMPFolderWithFileName:@"jquery.min" fileType:@"js"];
//png 文件
[self copyResourcesToTMPFolderWithFileName:@"comment_icon" fileType:@"png"];
}
-(void)copyResourcesToTMPFolderWithFileName:(NSString*)fileName fileType:(NSString *)fileType{
NSString *copyPath = [[NSBundle mainBundle] pathForResource:fileName ofType:fileType];
[self copyFileWithPath:copyPath];
}
//复制文件到 tmp 文件夹下
- (void)copyFileWithPath:(NSString *)path{
NSFileManager * fileManager= [NSFileManager defaultManager];
//创建文件夹路径
NSURL * temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];
//是否是文件夹
BOOL isDir;
BOOL isExit = [fileManager fileExistsAtPath:temDirURL.absoluteString isDirectory:&isDir];
//文件夹是否存在
if (!isExit || !isDir) {
[fileManager createDirectoryAtURL:temDirURL withIntermediateDirectories:YES attributes:nil error:nil];
}
// NSLog(@"temDirURL : %@",temDirURL.absoluteString);
//判断数据库文件是否存在
NSString * temDirURLpath = [temDirURL.absoluteString stringByReplacingOccurrencesOfString:@"file:///" withString:@"/"];
// NSLog(@"temDirURL : %@",temDirURLpath);
NSString * filePath = [temDirURLpath stringByAppendingPathComponent:[[path componentsSeparatedByString:@"/"] lastObject]];
// NSLog(@"filePath : %@",filePath);
//如果文件不存在，则复制
if (![fileManager fileExistsAtPath:filePath]) {
NSError * error = nil;
BOOL isSuccess = [fileManager copyItemAtPath:path toPath:filePath error:&error];
NSLog(@"文件%@", isSuccess ? @"拷贝成功" : @"拷贝失败");
if(error){
NSLog(@"%@",error.description);
}
}
}
另外,一些绝对地址,还需要替换
+ (NSString *)setingDefaultspPath:(NSString *)path{
if (![CommonFunction isIOS10AndLater]) {
NSURL * temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];
NSString * temDirURLpath = [temDirURL.absoluteString stringByReplacingOccurrencesOfString:@"file:///" withString:@"/"];
return [temDirURLpath stringByAppendingPathComponent:[[path componentsSeparatedByString:@"/"] lastObject]];
}else{
return path;
}
}
//用法
NSString *defaultpath = [[NSBundle mainBundle] resourcePath];
defaultpath = [defaultpath stringByAppendingPathComponent:@"userweb_headImage_defaultImage.png"];
defaultpath = [CommentHtmlManager setingDefaultspPath:defaultpath];//这里替换地址
[commentList appendFormat:@"<div style=\"display:inline-block;float:left;\"><img data-original=\"%@\" originsrc=\"%@\" class=\"headerimage\" onError=\"LoadDefaultHeaderImage();\" defaultImagesrc=\"%@\" src=\"%@\" onclick=\"showotheruserinfo(%ld,\\'%@\\');\"/>",[CommentHtmlManager GetAvatarAddress:[NSString stringWithFormat:@"%ld",userid]],[CommentHtmlManager GetAvatarAddress:[NSString stringWithFormat:@"%ld",userid]],defaultpath,defaultpath,userid,[[nickname stringByReplacingOccurrencesOfString:@"%5c" withString:@"%5c%5c"] stringByReplacingOccurrencesOfString:@"%27" withString:@"%5c%27"]];
参考链接:
https://www.jianshu.com/p/868dee57a0ef
https://www.jianshu.com/p/1688c11af71c
