iOS OC开发，文件的下载、预览
/// 下载/打开
- (void)downloadActionWithDownloadString:(NSString *)downloadString{
//url : 下载地址
NSString *url;
if ([downloadString containsString:@"?"]) {
NSRange range = [downloadString rangeOfString:@"?"];
url = [downloadString substringToIndex:range.location];
}else{
url = downloadString;
}
//suffix : 后缀.zip .doc
NSString * suffix = [url pathExtension];
NSMutableArray *tempArray = [NSMutableArray arrayWithArray:[url componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"/."]]];//@",!"以,或!切割，而不是把,!连在一起当成一个整体进行切割
NSInteger count = tempArray.count-2;
NSString *preName = tempArray[count];
//name : 文件名XXX.zip
NSString * name = [NSString stringWithFormat:@"%@.%@", preName,suffix];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths lastObject];
NSFileManager *fileManager = [NSFileManager defaultManager];
//创建一个本地沙盒文件,便于日后管理,比如删除
NSString * filesPath = [documentsDirectory stringByAppendingPathComponent:@"files"];
if (![[NSFileManager defaultManager] fileExistsAtPath:filesPath]) {
/// 创建一个文件
BOOL success = [[NSFileManager defaultManager] createDirectoryAtPath:filesPath withIntermediateDirectories:YES attributes:nil error:nil];
NSLog(@"success:%d", success);
}
//filepath :下载后的文件本地路径
NSString *filePath = [filesPath stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@", name]];
if ([fileManager fileExistsAtPath:filePath]) {
//文件已经存在,直接打开
UIAlertController * alertController = [UIAlertController alertControllerWithTitle:@"是否打开文件" message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction * cancelAction =[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
[alertController addAction:cancelAction];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
[self openDocxWithPath:filePath];
}]];
[self presentViewController:alertController animated:YES completion:nil];
}else {
//文件不存在,要下载
UIAlertController * alertController = [UIAlertController alertControllerWithTitle:@"是否下载并打开文件" message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction * cancelAction =[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
[alertController addAction:cancelAction];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
[self downloadDocxWithFilePath:filePath downloadString:downloadString];
}]];
[self presentViewController:alertController animated:YES completion:nil];
}
}
/**
下载文件
@param filePath 文件本地路径
@param downloadString 文件下载地址
*/
-(void)downloadDocxWithFilePath:(NSString *)filePath downloadString:(NSString *)downloadString{
NSString *urlString = downloadString;
NSURL * url = [NSURL URLWithString:urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
NSLog(@"%lld %lld",downloadProgress.completedUnitCount,downloadProgress.totalUnitCount);
NSLog(@"下载中....");
} destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
return [NSURL fileURLWithPath:filePath]; //这里返回的是文件下载到哪里的路径 要注意的是必须是携带协议file://
} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
NSString *name = [filePath path];
[self openDocxWithPath:name];
}];
[task resume];
}
/**
打开文件
@param filePath 文件路径
*/
-(void)openDocxWithPath:(NSString *)filePath {
UIDocumentInteractionController *doc= [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:filePath]];
doc.delegate = self;
[doc presentPreviewAnimated:YES];
// 打开的过程有点慢
}
#pragma mark - UIDocumentInteractionControllerDelegate
//必须实现的代理方法 预览窗口以模式窗口的形式显示，因此需要在该方法中返回一个view controller ，作为预览窗口的父窗口。如果你不实现该方法，或者在该方法中返回 nil，或者你返回的 view controller 无法呈现模式窗口，则该预览窗口不会显示。
- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller{
return self;
}
- (UIView*)documentInteractionControllerViewForPreview:(UIDocumentInteractionController*)controller {
return self.view;
}
- (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController*)controller {
return CGRectMake(0, 30, self.view.frame.size.width, self.view.frame.size.height);
}
