//使用Foundation中的NSTemporaryDirectory函式直接返回代表temp資料夾的全路徑的字串物件

NSString *tempDirectory = NSTemporaryDirectory();

NSString *file = [tempDirectory stringByAppendingPathComponent:@"file.txt"];

實現例子如下:

NSArray *path = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);

NSString *docDir = [path objectAtIndex:0];

NSLog(@"filepath:%@",docDir);

NSString *str = @"hello.jpg";

NSString *filepath = [docDir stringByAppendingPathComponent:str];

//NSString *filepath = [docDir stringByAppendingPathComponent:[NSString stringWithUTF8String:"///mest.txt"]];

NSLog(@"filepath:%@",filepath);

BOOL success = [[NSFileManager defaultManager]createFileAtPath: filepath contents:nil attributes:nil];

NSLog(@"result",success);

printf("Create File:%s %s.",[filepath UTF8String], success ? "Success" : "Error");

NSString* reValue= [NSString stringWithString:@"\\"success\\""];