读写txt文件

//写

NSString *saveStr = @"保存文件";

NSString *fp = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/save.txt"];[saveStr writeToFile:fp atomically:YES encoding:NSUnicodeStringEncoding error:nil];

//读

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString *documentsDirectory = [paths objectAtIndex:0];NSString *appFile = [documentsDirectory stringByAppendingPathComponent:@"save.txt"];NSString *str = [[NSString alloc] initWithContentsOfFile:appFile                                                    encoding:NSUnicodeStringEncoding                                                  error:NULL];NSLog(@"str:::%@",str);

//保存位置

NSLibraryDirectory跟NSDocumentDirectory

NSDocumentDirectory能在iTunes里找到并导出

NSLibraryDirectory在iTunes里找不到