Xcode8到Xcode9已有项目报错

1."_OBJC_CLASS_$_RealReachability",referenced from:Objc-class-ref in Appdelegate.o 错误.

解决方法:下载最新的RealReachability,替换本地

2.Illegal Configuration: Compiling IB documents for earlier than iOS 7

解决方法:检索xib文件,选中xib文件,在右侧属性栏interface Builder Document里面,Builds for,选择最低iOS版本

3.网易云信报错,重复定义height

解决方法:

else if ([modelInArray isKindOfClass:[NIMTimestampModel class]])

{

cellHeight = [(NIMTimestampModel*)modelInArray height];

}