NSString *sysConfigFilePath = [self dataFilePathWithFileName:_sysConfigFileName WithDirType:NSDocumentDirectory];
NSLog(@"sysConfigFilePath = %@",sysConfigFilePath)- (NSString *)dataFilePathWithFileName:(NSString *)fileName WithDirType:(NSSearchPathDirectory)dirType
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(dirType, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *absolutefileName = [fileName lastPathComponent];
return [documentsDirectory stringByAppendingPathComponent:absolutefileName];
}有木有毛病,有概率出现crash,定位在 获取路径的地方。