NSString小结

第一个中能够读取将数值转换成字string

NSString* sceneName = [@"scene_" stringByAppendingFormat:@"%d.mid", sceneid];//字符串拼接

第二个是的简单的string拼接

NSString* abd = [@"ji"stringByAppendingString:@"adsfas" ];

他们都只能拼接一次如果想多次拼接的话就要嵌套

  NSString* fullName = [[@"img_"stringByAppendingFormat:@"%d",3] stringByAppendingString: @".png"];