目录
前言
应用场景：文件下载、打印
I 第三方SDK分享文件
1.1 微信SDK
/**
enum WXScene {
WXSceneSession = 0,
WXSceneTimeline = 1,
WXSceneFavorite = 2,
};
文件真实数据内容
* @note 大小不能超过10M
*/
@property (nonatomic, retain) NSData *fileData;
*/
- (void)sendFileContent
{
WXMediaMessage *message = [WXMediaMessage message];
message.title = @"ML.pdf";
message.description = @"Pro CoreData";
[message setThumbImage:[UIImage imageNamed:@"res2.jpg"]];
WXFileObject *ext = [WXFileObject object];
ext.fileExtension = @"pdf";
NSString* filePath = [[NSBundle mainBundle] pathForResource:@"ML" ofType:@"pdf"];
ext.fileData = [NSData dataWithContentsOfFile:filePath];
//+ (nullable instancetype)dataWithContentsOfURL:(NSURL *)url;
message.mediaObject = ext;
SendMessageToWXReq* req = [[[SendMessageToWXReq alloc] init]autorelease];
req.bText = NO;
req.message = message;
req.scene = WXSceneSession;
[WXApi sendReq:req completion:nil];
}
1.2 友盟SDK
#pragma mark - UMFileObject /*! @brief 多媒体消息中包含的文件数据对象 * * @see UMShareObject */ @interface UMShareFileObject : UMShareObject /** 文件后缀名 * @note 长度不超过64字节 */ @property (nonatomic, retain) NSString *fileExtension; /** 文件真实数据内容 * @note 大小不能超过10M */ @property (nonatomic, retain) NSData *fileData; /** 文件的名字(不包含后缀) * @note 长度不超过64字节 */ @property (nonatomic, retain) NSString *fileName; @end
II 原生API的文件预览及其他应用打开
- (BOOL)presentOptionsMenuFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated; - (BOOL)presentOptionsMenuFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated; // Bypasses the menu and opens the full screen preview window for the item at URL. Returns NO if the item could not be previewed. // Note that you must implement the delegate method documentInteractionControllerViewControllerForPreview: to preview the document. - (BOOL)presentPreviewAnimated:(BOOL)animated;//预览文件 // Presents a menu allowing the user to open the document in another application. The menu // will contain all applications that can open the item at URL. // Returns NO if there are no applications that can open the item at URL. - (BOOL)presentOpenInMenuFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated;//包括快速预览菜单、打印、复制 - (BOOL)presentOpenInMenuFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated;//不包括包括快速预览菜单
- 获取NSURL
//方式1：
NSString* filePath = [[NSBundle mainBundle] pathForResource:@"ML" ofType:@"pdf"];
NSURL *url = [NSURL fileURLWithPath:filePath];
// 方式2
//NSURL *url = [[NSBundle mainBundle] URLForResource:@"ML" withExtension:@"pdf"];
- 实例化UIDocumentInteractionController
UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url]; documentController.delegate = self;//UIDocumentInteractionControllerDelegate
2.1 预览文件
[documentController presentPreviewAnimated:YES]; // 预览文件
2.2 文件分享
CGRect rect = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
[documentController presentOptionsMenuFromRect:rect inView:self.view animated:YES];//包括快速预览菜单、打印、复制
// [documentController presentOpenInMenuFromRect:rect inView:self.view animated:YES];//不包括包括快速预览菜单
2.3 控制是否显示copy、 print、saveToCameraRoll
#pragma mark - UIDocumentInteractionControllerDelegate
- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)interactionController{
return self;
}
//
/**
print: saveToCameraRoll: copy:
*/
- (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller canPerformAction:(SEL)action{
NSLog(@"canPerformAction %s %@ ", __func__,NSStringFromSelector(action));
//NSStringFromSelector(_cmd) //当前选择器的名字
// return NO;不显示copy print
return YES;//显示copy print
}
- (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller performAction:(SEL)action{
NSLog(@"canPerformAction %s", __func__);
return YES;//显示copy print
// return NO;
}
III 案例
3.1 文件下载和预览
- (void)openfile:(CRMfilePreviewCellM*)m{
// NSURL *relativeToURL = [NSURL URLWithString:m.url ];//必须先下载，否则无法查看文件内容
[SVProgressHUD showWithStatus:@"加载中..."];
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:m.url]];
[SVProgressHUD dismiss];
if(data== nil){
[SVProgressHUD showInfoWithStatus:@"文件下载失败"];
return ;
}
// //用单例类 NSFileManager的对象,将文件写入本地
NSFileManager *fileManage = [NSFileManager defaultManager];
NSString *tmp = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
// NSString *tmp = NSTemporaryDirectory();
NSString *fileName = m.fileName;
tmp =[tmp stringByAppendingPathComponent:fileName];
BOOL isSuccess = [fileManage createFileAtPath:tmp contents:data attributes:nil];
if(isSuccess){
NSURL *url = [NSURL fileURLWithPath:tmp];
UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
//UIDocumentInteractionController delegate must implement documentInteractionControllerViewControllerForPreview: to allow preview
documentController.delegate = self;//UIDocumentInteractionControllerDelegate
[documentController presentPreviewAnimated:YES]; // 预览文件
}
}
#pragma mark - UIDocumentInteractionControllerDelegate
- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)interactionController{
return self;
}
//
/**
print: saveToCameraRoll: copy:
*/
- (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller canPerformAction:(SEL)action{
NSLog(@"canPerformAction %s %@ ", __func__,NSStringFromSelector(action));
//NSStringFromSelector(_cmd) //当前选择器的名字
// return NO;不显示copy print
return YES;//显示copy print
}
- (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller performAction:(SEL)action{
NSLog(@"canPerformAction %s", __func__);
return YES;//显示copy print
// return NO;
}
3.2 使用数据模型保存下载文件路径
懒加载
// NSURL *relativeToURL = [NSURL URLWithString:m.url ];//必须先下载，否则无法查看文件内容
- (NSString *)filePathFromUrl{
if(_filePathFromUrl !=nil){
return _filePathFromUrl;
}
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:self.url]];
if(data== nil){
[SVProgressHUD showInfoWithStatus:@"文件下载失败"];
return nil;
}
// //用单例类 NSFileManager的对象,将文件写入本地
NSFileManager *fileManage = [NSFileManager defaultManager];
NSString *tmp = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
// NSString *tmp = NSTemporaryDirectory();
NSString *fileName = self.fileName;
tmp =[tmp stringByAppendingPathComponent:fileName];
BOOL isSuccess = [fileManage createFileAtPath:tmp contents:data attributes:nil];
_filePathFromUrl = tmp;
if(!isSuccess){
_filePathFromUrl = nil;
}
return _filePathFromUrl;
}
预览文件
- (void)openfile:(CRMfilePreviewCellM*)m{
if(!m.filePathFromUrl){
return;
}
NSURL *url = [NSURL fileURLWithPath:m.filePathFromUrl];
UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
//UIDocumentInteractionController delegate must implement documentInteractionControllerViewControllerForPreview: to allow preview
documentController.delegate = self;//UIDocumentInteractionControllerDelegate
[documentController presentPreviewAnimated:YES]; // 预览文件
}
3.3 使用数据模型分享文件
@property (nonatomic,copy) NSString *fileName;
@property (nonatomic,copy) NSString *url;
//
@property (nonatomic,copy) NSString *filePathFromUrl;
/**
/** 文件真实数据内容
* @note微信文件分享 大小不能超过10M
*/
@property (nonatomic, retain) NSData *fileData;
- (void)sendFileContent;
- (NSData *)fileData{
if(_fileData==nil){
NSString* filePath= [self filePathFromUrl];
_fileData =[NSData dataWithContentsOfFile:filePath];
}
return _fileData;
}
- (void)sendFileContent
{
WXMediaMessage *message = [WXMediaMessage message];
message.title = self.fileName;
message.description =self.fileName;
[message setThumbImage:[UIImage imageNamed:self.iconName]];
WXFileObject *ext = [WXFileObject object];
ext.fileExtension =self.fileExtension;
ext.fileData =self.fileData;
//+ (nullable instancetype)dataWithContentsOfURL:(NSURL *)url;
message.mediaObject = ext;
SendMessageToWXReq* req = [[SendMessageToWXReq alloc] init];
req.bText = NO;
req.message = message;
req.scene = WXSceneSession;
[WXApi sendReq:req completion:nil];
}
3.4 清理缓存
获取沙盒缓存路径
+ (nullable NSString *)userCacheDirectory {
NSArray<NSString *> *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
return paths.firstObject;
}
清理沙河文件缓存
- (void)removeAllData {
[self.fileManager removeItemAtPath:self.diskCachePath error:nil];
[self.fileManager createDirectoryAtPath:self.diskCachePath
withIntermediateDirectories:YES
attributes:nil
error:NULL];
}
清理WKWebView的缓存
+ (void)clearWebCacheCompletion:(dispatch_block_t)completion {
if (@available(iOS 9.0, *)) {
NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
[[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:completion];
} else {
NSString *libraryDir = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)[0];
NSString *bundleId = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleIdentifier"];
NSString *webkitFolderInLib = [NSString stringWithFormat:@"%@/WebKit",libraryDir];
NSString *webKitFolderInCaches = [NSString stringWithFormat:@"%@/Caches/%@/WebKit",libraryDir,bundleId];
NSString *webKitFolderInCachesfs = [NSString stringWithFormat:@"%@/Caches/%@/fsCachedData",libraryDir,bundleId];
NSError *error;
/* iOS8.0 WebView Cache path */
[[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCaches error:&error];
[[NSFileManager defaultManager] removeItemAtPath:webkitFolderInLib error:nil];
/* iOS7.0 WebView Cache path */
[[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCachesfs error:&error];
if (completion) {
completion();
}
}
}
清理图片缓存
+(void)clearCache:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileName in childerFiles) {
//如有需要，加入条件，过滤掉不想删除的文件
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
[fileManager removeItemAtPath:absolutePath error:nil];
}
}
// [[SDImageCache sharedImageCache] cleanDisk];
[[SDImageCache sharedImageCache] clearDiskOnCompletion:^{
}];
}
以上就是iOS文件预览分享小技能示例的详细内容，更多关于iOS文件预览分享的资料请关注其它相关文章！
