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我想讀取和打印從Dropbox下載的文件內容,但是我的「readFile」方法打印出null。我確定該文件已成功下載。讀取從Dropbox下載的文件內容-objective-c
-(void)download
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", @"File.txt"]];
[[self restClient] loadFile:@"/File.txt" intoPath:filePath];
}
- (void)restClient:(DBRestClient*)client loadedFile:(NSString*)localPath
contentType:(NSString*)contentType metadata:(DBMetadata*)metadata {
[self readFile:@"File.txt"];
NSLog(@"File loaded into path: %@", localPath);
}
-(void)readFile:(NSString *)fileName
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileNameData=[NSString stringWithFormat:@"%@",fileName];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:fileNameData];
NSString *str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];
NSError *error;
NSString *str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error];
NSLog(@"%@", error);
}
,這是輸出:
---------******** CONTENT OF THE DOWNLOADED FILE *********------------(null)
我更新了我的代碼捕獲erorr,我正從stringWithContentsOfFile這個錯誤:
Error Domain=NSCocoaErrorDomain Code=261 "The operation couldn’t be completed. (Cocoa error 261.)" UserInfo=0x1669c2b0 {NSFilePath=/var/mobile/Applications/11B10727-E372-1147-26BD-1D24S60B8E54/Documents/File.txt, NSStringEncoding=4} 2013-08-05 22:06:03.229 DBApp[496:60b]
實際文件名也是File.txt,文件從下拉框下載 – amone
您應該斷點讀取和寫入文件的位置。我認爲你的下載不起作用。 – Mundi
所以你看到「文件加載到路徑:File.txt」在日誌中?如果有一些有用的東西,你也可以嘗試從'stringWithContentsOfFile'中捕獲錯誤。 – smarx