Ios -writeToURL未覆盖上一次写入
更新#1：忘了提到这是在iPad应用程序上运行的 这是我修改过的代码（仍然不起作用，但去掉了不必要的代码）： 当我在XCode调试器中查看custImage时，我看到一个与前一个图像不同的图像，这是正确的。但是，当它有时间在fileURL上显示图像时，它与custImage完全不同，并且是第一次显示的同一图像 更新#2：我发现fileURL具有正确的映像，但第二次没有写入设备（第一个映像没有被替换）。 更新#3:这是显示在UIWebView弹出窗口中的htmlString的内容：Ios -writeToURL未覆盖上一次写入,ios,nsfilemanager,Ios,Nsfilemanager,更新#1：忘了提到这是在iPad应用程序上运行的 这是我修改过的代码（仍然不起作用，但去掉了不必要的代码）： 当我在XCode调试器中查看custImage时，我看到一个与前一个图像不同的图像，这是正确的。但是，当它有时间在fileURL上显示图像时，它与custImage完全不同，并且是第一次显示的同一图像 更新#2：我发现fileURL具有正确的映像，但第二次没有写入设备（第一个映像没有被替换）。 更新#3:这是显示在UIWebView弹出窗口中的htmlString的内容： <htm
<html><head><style type="text/css"> body {font-family: "Verdana"; font-size: 12;} </style></head><body>
<h2>Rolf Marsh</h2><p>phone: 213-555-1234<p>services: Art, Decals<p><img src="file:///private/var/mobile/Applications/FEE7159E-1FF8-4B94-A446-2A4C72E0AD41/tmp/custImage.png"/></body></html>
正文{字体系列：“Verdana”；字体大小：12；}
Rolf Marsh电话：213-555-1234服务：艺术、贴花
有没有关于如何解决这个问题的建议？据我所知，您从未将数据写入磁盘 只有在已注释掉的部分中，您才尝试删除 将其写在：
NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];
NSURL *fileURL = [[tmpDirURL URLByAppendingPathComponent:@"custImage"] URLByAppendingPathExtension:@"png"];
//write
NSError*writeError = nil;
[client.aClientImage writeToURL:fileURL options:0 error:&writeError];
NSAssert(writeError==nil, writeError);
//read / use in the html or so
...
别忘了重新加载web视图或用于显示html的任何内容我想出来了。。。对于其他有相同问题的人，下面是有效的代码。请注意，我没有将其保存到临时文件中，因为我在核心数据实体中已经有了该图像。代码如下：
-(void) showExistingAppointmentDetails: (AppointmentInfo *) apptSelected {
// make rectangle to attach popover
CGRect rectangle = CGRectMake( [apptSelected.aPosX floatValue], [apptSelected.aPosY floatValue],
[apptSelected.aPosW floatValue], [apptSelected.aPosH floatValue]);
// see if this is for staff; if so, don't display anything
if([apptSelected.aApptKey isEqual: @"Staff"])
return;
NSPredicate *predicate = ([NSPredicate predicateWithFormat: @"aClientKey == %@", apptSelected.aApptKey ]); // was aApptKey
ClientInfo *client = [ClientInfo MR_findFirstWithPredicate:predicate inContext:localContext];
UIImage *image = [UIImage imageWithData:client.aClientImage]; // image is good <---------
// write appointment info into html string
NSString *htmlString;
if(client.aClientEMail.length > 0) {
htmlString = [NSString stringWithFormat:NSLocalizedString(@"HTML_STRING1",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientEMail.length == 0? @"": client.aClientEMail,
client.aClientPrimaryPhone,
apptSelected.aServices,
[self htmlForPNGImage:image]];
}
else {
htmlString = [NSString stringWithFormat:NSLocalizedString(@"HTML_STRING2",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientPrimaryPhone,
apptSelected.aServices,
[self htmlForPNGImage:image]];
}
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 250, 300)];
popoverView.backgroundColor = [UIColor colorWithWhite:(CGFloat)1.0 alpha:(CGFloat)1.0]; // frame color?
popoverContent.view = popoverView;
//resize the popover view shown in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(250, 300);
// add the UIWebView for RichText
UIWebView *webView = [[UIWebView alloc] initWithFrame:popoverView.frame];
webView.backgroundColor = [UIColor whiteColor]; // change background color here
// add the webView to the popover
[webView loadHTMLString:htmlString baseURL:[NSURL URLWithString:nil]];
[popoverView addSubview:webView];
// if previous popoverController is still visible... dismiss it
if ([popoverController isPopoverVisible]) {
[popoverController dismissPopoverAnimated:YES];
}
//create a popover controller
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
[popoverController presentPopoverFromRect:rectangle inView:self
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
- (NSString *) htmlForPNGImage:(UIImage *) image {
NSData *imageData = UIImagePNGRepresentation(image);
NSString *imageSource = [NSString stringWithFormat:@"data:image/png;base64,%@",[imageData base64Encoding]];
return [NSString stringWithFormat:@"%@", imageSource];
}
-（无效）显示现有任命详细信息：（任命信息*）已选择应用程序{
//制作矩形以附加popover
CGRect矩形=CGRectMake（[apptSelected.aPosX floatValue]，[apptSelected.aPosY floatValue]，
[apptSelected.aPosW floatValue]，[apptSelected.aPosH floatValue]；
//看看这是否是给员工的；如果是，不要显示任何内容
如果（[apptSelected.aApptKey isEqual:@“Staff”]）
返回；
NSPredicate*谓词=（[NSPredicate predicateWithFormat:@“aClientKey==%@”，apptSelected.aApptKey]）；//是aApptKey
ClientInfo*client=[ClientInfo MR_findFirstWithPredicate:predicate inContext:localContext]；
UIImage*image=[UIImage imageWithData:client.aClientImage]；//图像良好（0）{
htmlString=[NSString stringWithFormat:NSLocalizedString（@“HTML_STRING1”，nil），
client.aClientFirstName，
client.aClientLastName，
client.aClientEMail.length==0？@“”：client.aClientEMail，
client.aClientPrimaryPhone，
apptSelected.a服务，
[自HTMLFormginImage:image]；
}
否则{
htmlString=[NSString stringWithFormat:NSLocalizedString（@“HTML_STRING2”，nil），
client.aClientFirstName，
client.aClientLastName，
client.aClientPrimaryPhone，
apptSelected.a服务，
[自HTMLFormginImage:image]；
}
UIViewController*popoverContent=[[UIViewController alloc]init]；
UIView*popoverView=[[UIView alloc]initWithFrame:CGRectMake（0,0,250,300）]；
popoverView.backgroundColor=[UIColor colorWithWhite:（CGFloat）1.0 alpha:（CGFloat）1.0]；//帧颜色？
popoverContent.view=popoverView；
//将当前视图中显示的popover视图调整为视图的大小
popoverContent.contentSizeForViewInPopover=CGSizeMake（250300）；
//为RichText添加UIWebView
UIWebView*webView=[[UIWebView alloc]initWithFrame:popoverView.frame]；
webView.backgroundColor=[UIColor whiteColor]；//在此处更改背景色
//将webView添加到弹出窗口
[webView加载htmlString:htmlString baseURL:[NSURL URLWithString:nil]]；
[popoverView addSubview:webView]；
//如果以前的popoverController仍然可见…请将其关闭
如果（[popoverController ispoverVisible]）{
[popoverController解除PopOveranimated:是]；
}
//创建一个popover控制器
popoverController=[[UIPopoverController alloc]initWithContentViewController:popoverContent]；
[popoverController presentPopoverFromRect:矩形查看：自
许可证箭头方向：UIPopOver箭头方向任何动画：是]；
}
-（NSString*）HTMLFormginImage:（UIImage*）图像{
NSData*imageData=UIImagePNGRepresentation（图像）；
NSString*imageSource=[NSString stringWithFormat:@“数据：图像/png；base64，%@，[imageData base64编码]]；
返回[NSString stringWithFormat:@“%@”，imageSource]；
}
-(void) showExistingAppointmentDetails: (AppointmentInfo *) apptSelected {
// make rectangle to attach popover
CGRect rectangle = CGRectMake( [apptSelected.aPosX floatValue], [apptSelected.aPosY floatValue],
[apptSelected.aPosW floatValue], [apptSelected.aPosH floatValue]);
// see if this is for staff; if so, don't display anything
if([apptSelected.aApptKey isEqual: @"Staff"])
return;
NSPredicate *predicate = ([NSPredicate predicateWithFormat: @"aClientKey == %@", apptSelected.aApptKey ]); // was aApptKey
ClientInfo *client = [ClientInfo MR_findFirstWithPredicate:predicate inContext:localContext];
UIImage *image = [UIImage imageWithData:client.aClientImage]; // image is good <---------
// write appointment info into html string
NSString *htmlString;
if(client.aClientEMail.length > 0) {
htmlString = [NSString stringWithFormat:NSLocalizedString(@"HTML_STRING1",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientEMail.length == 0? @"": client.aClientEMail,
client.aClientPrimaryPhone,
apptSelected.aServices,
[self htmlForPNGImage:image]];
}
else {
htmlString = [NSString stringWithFormat:NSLocalizedString(@"HTML_STRING2",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientPrimaryPhone,
apptSelected.aServices,
[self htmlForPNGImage:image]];
}
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 250, 300)];
popoverView.backgroundColor = [UIColor colorWithWhite:(CGFloat)1.0 alpha:(CGFloat)1.0]; // frame color?
popoverContent.view = popoverView;
//resize the popover view shown in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(250, 300);
// add the UIWebView for RichText
UIWebView *webView = [[UIWebView alloc] initWithFrame:popoverView.frame];
webView.backgroundColor = [UIColor whiteColor]; // change background color here
// add the webView to the popover
[webView loadHTMLString:htmlString baseURL:[NSURL URLWithString:nil]];
[popoverView addSubview:webView];
// if previous popoverController is still visible... dismiss it
if ([popoverController isPopoverVisible]) {
[popoverController dismissPopoverAnimated:YES];
}
//create a popover controller
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
[popoverController presentPopoverFromRect:rectangle inView:self
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
- (NSString *) htmlForPNGImage:(UIImage *) image {
NSData *imageData = UIImagePNGRepresentation(image);
NSString *imageSource = [NSString stringWithFormat:@"data:image/png;base64,%@",[imageData base64Encoding]];
return [NSString stringWithFormat:@"%@", imageSource];
}