Objective c NSFileManager创建文件失败 NSArray*path=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); NSString*documentsDirectory=[paths objectAtIndex:0]; NSString*文件路径; 如果(str_FolderName!=nil){ 文件路径=[DocumentsDirectoryStringByAppendingPathComponent:[NSString stringWithFormat:@/%@/%@],str_FolderName,str_FileName]; }否则{ filePath=[DocumentsDirectoryStringByAppendingPathComponent:[NSString stringWithFormat:@/%@],str_FileName]]; } NSFileManager*fileManager=[NSFileManager defaultManager]; NSMutableDictionary*数据; 如果([fileManager fileExistsAtPath:filePath]) { //文件不存在 数据=[[NSMutableDictionary alloc]initWithContentsOfFile:filePath]; }否则{ BOOL Success=[fileManager createFileAtPath:filePath内容:nil属性:nil]; //有时返回是,有时返回否
我更新了您的一些代码。我将NSFilemanager的正确分配及其对我的工作进行了说明。您可以在文件路径或filemanager对象中遇到问题Objective c NSFileManager创建文件失败 NSArray*path=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); NSString*documentsDirectory=[paths objectAtIndex:0]; NSString*文件路径; 如果(str_FolderName!=nil){ 文件路径=[DocumentsDirectoryStringByAppendingPathComponent:[NSString stringWithFormat:@/%@/%@],str_FolderName,str_FileName]; }否则{ filePath=[DocumentsDirectoryStringByAppendingPathComponent:[NSString stringWithFormat:@/%@],str_FileName]]; } NSFileManager*fileManager=[NSFileManager defaultManager]; NSMutableDictionary*数据; 如果([fileManager fileExistsAtPath:filePath]) { //文件不存在 数据=[[NSMutableDictionary alloc]initWithContentsOfFile:filePath]; }否则{ BOOL Success=[fileManager createFileAtPath:filePath内容:nil属性:nil]; //有时返回是,有时返回否,objective-c,Objective C,我更新了您的一些代码。我将NSFilemanager的正确分配及其对我的工作进行了说明。您可以在文件路径或filemanager对象中遇到问题 NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath; if
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath;
if (str_FolderName!=nil){
filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@/%@",str_FolderName,str_FileName]];
} else {
filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@",str_FileName]];
}
NSFileManager *fileManager = [NSFileManager defaultManager];
NSMutableDictionary *data;
if ([fileManager fileExistsAtPath: filePath])
{
//file is exist
data = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
} else {
BOOL Success = [fileManager createFileAtPath:filePath contents:nil attributes:nil];
// sometime return YES, sometime return NO <<< this is my question
if(Success == YES){
data = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
}else{
data = [[NSMutableDictionary alloc] init];
}
}
for (uint32_t u32_Cnt=0;u32_Cnt<arr_Keys.count;u32_Cnt++) {
[data setValue:[NSString stringWithFormat:@"%@",[marr_Data objectAtIndex:u32_Cnt]] forKey:[arr_Keys objectAtIndex:u32_Cnt]];
}
if ([data writeToFile:filePath atomically: YES])
{
NSLog(@"[Save OK]");
return DEF_PASS;
} else {
NSLog(@"[Save Fail]"); <<<< now happened
}
不同的是我的路径包含一个文件夹名,然后我测试它是否成功创建了没有文件夹的文件,但是创建了一个文件夹的文件失败了…你能给它一个吗?filePath=[DocumentsDirectoryStringByAppendingPathComponent:[NSString stringWithFormat:@/%@],str_FolderName,str_FileName]];您得到的答案是错误的,因为当您尝试同时使用文件夹和文件名创建时,您还必须创建字典。让我更新代码。您的意思是我不能使用dolder创建文件?好的……我读了您的更新
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath;
if (str_FolderName!=nil){
filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@/%@",str_FolderName,str_FileName]];
}else{
filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@",str_FileName]];
}
NSFileManager *fileManager = [NSFileManager defaultManager];
NSMutableDictionary *data;
if ([fileManager fileExistsAtPath: filePath])
{
//file is exist
data = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
}
else
{
if (str_FolderName!=nil){
NSString *strDicPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@",str_FolderName]];
// You need to create director before creating file.
if (![[NSFileManager defaultManager] fileExistsAtPath:strDicPath])
{
NSError *error;
[[NSFileManager defaultManager] createDirectoryAtPath:strDicPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder
}
}
BOOL Success = [fileManager createFileAtPath:filePath contents:nil attributes:nil];
// sometime return YES, sometime return NO <<< this is my question
if(Success == YES){
data = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
}else{
data = [[NSMutableDictionary alloc] init];
}
}
NSError *error;
NSString *stringToWrite = @"1\n2\n3\n4";
[stringToWrite writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error];