學科: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沒有正確設置，沒連，或者連的位置不對
• MyClass的實現部分沒synthesize MyTitle變量