簡單的任務不適用於我：iphone sdk

Question

有人可以請向我解釋爲什麼這個簡單的任務不起作用。
下面是代碼
loanDetails.currency = myCurrency;
NSLog(@" Value %@",myCurrency);
NSLog(@" Value %@",loanDetails.currency);
NSLog(@" Value %@",myCurrency);


輸出爲： -
2010-05-05 23:00:44.394 ExpenseTracker[3576:207] Value AFA
2010-05-05 23:00:44.750 ExpenseTracker[3576:207] Value (null)
2010-05-05 23:00:45.095 ExpenseTracker[3576:207] Value AFA


而且定義爲：

@property (nonatomic,retain) NSString *currency;


Answer 1

是loadDetails無？

Answer 2

那麼，當你寫loanDetails.currency = myCurrency，這是調用相當於[loanDetails setCurrency:myCurrency]。所以，看看你的標題：你是否意外地定義了它readonly？您是否合成了訪問器方法，或者您是自己編寫的？