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我有一个方法如何不在某些情况下加载视图?
- (void)viewDidAppear:(BOOL)animated
{
[self updateViews];
}
- (void) updateViews
{
NSInteger itemIndex = [[DataController sharedInstance] indexFromObjectProperty:itemUUID];
if (itemIndex == NSNotFound) {
[self.navigationController popViewControllerAnimated:YES];
}
NSDictionary *item = [[[DataController sharedInstance] getItems] objectAtIndex:itemIndex];
}
我没有必要的情况下,加载视图的ItemIndex == NSNotFound但在调试模式下这串被称为再下串访问,并导致异常。如何停止更新视图并显示根视图控制器?
在'if'块的末尾添加'return',或使用'else'-block? –
@MartinR今天我太累了,看不到简单的东西..谢谢! – ShurupuS