ios - 无法读取资源文件夹中的文件-iOS

Question

我正在尝试读取位于resources文件夹内Object Bank目录中的文件。

//Get path for file in object bank
NSString* path = [[NSBundle mainBundle] pathForResource:fileId ofType:@"eam" inDirectory:@"Object Bank"];
NSError *error=nil;

//Check if it is present at the location
Boolean prepositioned=[[NSFileManager defaultManager] fileExistsAtPath:path];
NSLog(@"File Found : %@",prepositioned?@"Yes":@"No");

//This outputs "File Found : Yes"

//Read file
NSString *fileContents=[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&error];
NSLog(@"Prepostioned content length: %d",fileContents.length);
//This outputs "Prepostioned content length: 0"

//if file is present:
if (!error) {
    //Do something

}
else
{   
    //Print the error
    NSLog(@"Error : %@",error.description);
}

我收到以下错误:

Error Domain=NSCocoaErrorDomain Code=261 "The operation couldn’t be completed. (Cocoa error 261.)" UserInfo=0x8c410d0 {NSFilePath=/Users/ctb/Library/Application Support/iPhone Simulator/6.0/Applications/16881651-3790-4C87-A3A0-1E1D60563684/OAS IPAD.app/Object Bank/70118600.eam, NSStringEncoding=4}

即使文件不存在，该路径也不返回 nil，并且 fileExistsAtPath:path始终返回yes，而不管文件是否存在。

我也尝试过:

NSArray *paths =[[NSBundle mainBundle] pathsForResourcesOfType:@"eam" inDirectory:@"Object Bank"];
for (NSString *path in paths) {
    NSString *fileString=[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"Resource : %u ",fileString.length);
}

但这有同样的问题。

Answer 1

绝对肯定地确保您要读取的文件是NSUTF8StringEncoding，否则您将遇到这种类型的错误，这会误导您没有告诉您由于编码不匹配而导致无法读取该文件。

用TextWrangler打开文件(文件类型为eam的fileId)，并检查其编码格式，然后在encoding参数中使用该编码。