objective-c - NSMutableDictionary 选择器 setObject forkey 错误

Question

这是我的代码

NSMutableDictionary* stations = [[NSMutableDictionary alloc] init];
RadioStation* newStation;
newStation = [[RadioStation alloc]
initWithName:@"Star 94 fm" atfrequency:91.4];
[stations setObject:newStation forkey:@"WSTR"];

但我不断收到错误消息："no visible @interface" for NSMutableDictionary declares the selector setObject forkey

任何帮助将不胜感激。

Answer 1

The correct selector is setObject:forKey:, not setObject:forkey:.