我有一个MatchDayDataController类,它有一个方法pushIncompleteDataToServer。
来自另一个类,SummaryVC.m我想在performSelectorInBackground中调用pushIncompleteDataToServer。
代码:
MatchDayDataController *sharedDataController = [MatchDayDataController sharedDataController];
[self performSelectorInBackground:@selector([sharedDataController pushIncompleteDataToServer]) withObject:nil];
它在performSelectorInBackground中显示了一些语法错误。我错过了什么?请指导。
答案 0 :(得分:3)
[self performSelectorInBackground:@selector([sharedDataController pushIncompleteDataToServer]) withObject:nil];
这将使代码在同一个类中搜索该方法
应该是:
[sharedDataController performSelectorInBackground:@selector(pushIncompleteDataToServer) withObject:nil];
会调用sharedDataController
类
此外,在方法performSelectorInBackground: withObject:
中, withObject 用于将参数传递给选择器方法。在这种情况下,由于没有参数,我们传递nil。
答案 1 :(得分:0)
试试这个,
[sharedDataController performSelectorInBackground:@selector(pushIncompleteDataToServer) withObject:nil];
而不是
[self performSelectorInBackground:@selector([sharedDataController pushIncompleteDataToServer]) withObject:nil];
答案 2 :(得分:0)
您需要将self
替换为sharedDataController
。
[sharedDataController performSelectorInBackground:@selector(pushIncompleteDataToServer) withObject:nil];
选择器将在performSelectorInBackground
消息的接收者上执行,self
不实现该方法。