为什么 Xcode 给我这个警告？
这是我以编程方式制作 UISearchBar 的代码
- (void)loadView {
[super loadView];
searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0,0,320,30)];
searchBar.delegate = self;
[self.view addSubview:searchBar];
}
here is the code I am making a UISearchBar programmatically
- (void)loadView {
[super loadView];
searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0,0,320,30)];
searchBar.delegate = self;
[self.view addSubview:searchBar];
}
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评论（3）
你没有发布警告。但是，我仍然可以假设它是以下两种可能性之一：
searchBar = [[UISearchBar...] 行上出现警告，说明有关类型的信息。这可能表明searchBar未正确定义为UISearchBar*。searchBar.delegate = self行上的警告，说明有关id的内容。这里的问题是您当前的类从未声明自己符合UISearchBarDelegate协议。在这种情况下，您需要修改您的@interface声明，如下所示：@interface MyClass : MySuperclassYou didn't post the warning. However, I can still make an assumption that it's one of the following two possibilities:
searchBar = [[UISearchBar...saying something about types. This may indicate thatsearchBarisn't defined correctly as aUISearchBar*.searchBar.delegate = self, saying something aboutid<UISearchBarDelegate>. The problem here is that your current class never declared itself as conforming to theUISearchBarDelegateprotocol. In this case, you need to amend your@interfacedeclaration like so:@interface MyClass : MySuperclass <UISearchBarDelegate>您的类是否可能不符合
UISearchBarDelegate？将您的类声明从 更改为无论如何
，警告是什么？
Is it maybe your class doesn't conform to
UISearchBarDelegate? Change you class declaration fromto
Anyway, what's the warning?
1- @interface YourClassName : 父类 < UISearchBarDelegate、UISearchDisplayDelegate、UIPopoverControllerDelegate、UIAlertViewDelegate>
@property UISearchBar *srchBar;
@end
2-@synthesize srchBar； // 在.m文件中
3- [self.srchBar setDelegate:self]; // 在 viewDidLoad
4 中- [srchBar resignFirstResponder]; // 这样辞职吧！
1- @interface YourClassName : ParentClass < UISearchBarDelegate, UISearchDisplayDelegate, UIPopoverControllerDelegate, UIAlertViewDelegate>
@property UISearchBar *srchBar;
@end
2- @synthesize srchBar; // in the .m file
3- [self.srchBar setDelegate:self]; // in viewDidLoad
4- [srchBar resignFirstResponder]; // resign THIS WAY!