学科:IOS/KB/Uncaught exception

this class is not key value coding-compliant for the key

示例：

 *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<MyClass 0x1ddc5400> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key MyTitle.'

可能原因：

• IBOutlet没有正确设置，没连，或者连的位置不对
• MyClass的实现部分没synthesize MyTitle变量