iOS中stringByAppendingString 和 stringByAppendingPathComponent 的区别

来源：互联网发布：良品铺子淘宝编辑：程序博客网时间：2024/05/30 23:30

今天在用FMDB创建数据库的过程中出现DB Open Error 14 的错误，仔细分析是路径不正确。

-(instancetype)init{

if(self = [superinit]){

NSString *doc =[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES) lastObject];

NSString *fileName = [docstringByAppendingPathComponent:@"bluetooth.db"];

self.mDb = [FMDatabasedatabaseWithPath:fileName];

if([self.mDbopen]){

[selfneedUpdate];

}

returnself;

}

我的路径中少了斜杠／，因为我误用了stringByAppendingString,其实用了stringByAppendingString也没关系，只是需要自己手动添加斜杠。使用stringByAppendingPathComponent就不需要手动操作了。

 NSString *imagePath = [skinPath stringByAppendingString:[NSString stringWithFormat:@"/%@",imageName]];//stringByAppendingString是在skinPath加后缀的意思 NSString *imagePath = [skinPath stringByAppendingPathComponent:imageName];//stringByAppendingPathComponent是在skinPath后面加上“／”号连接imageName让它成为完整的路径 NSLog(@"imagePath:%@",imagePath);

imagePath:/Users/will/Library/Application Support/iPhone Simulator/7.0.3/Applications/DA5B603D-4D07-4425-B7CC-5D49232189BE/Willing.app/tabbar_home.png

0 0