Question

我是ios的新手。我有以下代码来更改要加入的键盘的返回键类型。它在ios6中工作正常，但在ios7中没有。 if-block中的代码永远不会在ios7上执行。

有没有人见过类似的问题？这有什么解决方法吗？

if ([searchBarSubview conformsToProtocol:@protocol(UITextInputTraits)]) {
    [searchBar resignFirstResponder];
    [(UITextField *)searchBarSubview setReturnKeyType:UIReturnKeyJoin];
    [searchBar becomeFirstResponder];
}

我用Google搜索并发现“加入”按钮未显示，因为UISearchBar的内部结构（不应修改）已更改。我不知道如何解决这个问题以及在哪里发现了变化，任何人都可以解释一下？

还尝试了以下（类似方式）变通方法代码不够幸运

for(UIView *searchBarSubview in [searchBar subviews]) {
if([searchBarSubview conformsToProtocol:@protocol(UITextInputTraits)]) {
     [(UITextField *)searchBarSubview setReturnKeyType: UIReturnKeyJoin];
} else {
    for(UIView *subSubView in [searchBarSubview subviews]) {
        if([subSubView conformsToProtocol:@protocol(UITextInputTraits)]) {
            [(UITextField *)subSubView setReturnKeyType: UIReturnKeyJoin];
    }
}      
}

Answer 1

试试这个：

    UITextField *searchBarTextField ;
    NSArray *views = ([[[UIDevice currentDevice] systemVersion] floatValue] < 7.0f) ?      
    self.searchBar.subviews : [[self.searchBar.subviews
    objectAtIndex:0] subviews];
    for (UIView *subview in views)
   {
    if ([subview isKindOfClass:[UITextField class]])
    {
        searchBarTextField = (UITextField *)subview;
        break;
    }
  }
   searchBarTextField.returnKeyType = UIReturnKeyJoin;

Answer 2

try this for get textfield from searchbar
 for (UIView *subView in self.searchBar.subviews){
        for (UIView *searchView in subView.subviews){
            if ([searchView isKindOfClass:[UITextField class]])
                {

                [(UITextField *)searchView setKeyboardAppearance:UIKeyboardAppearanceAlert];
                [(UITextField *)searchView setEnablesReturnKeyAutomatically:NO];
                break;
                }
        }
    }

UITextInputTraits在ios7中不起作用

2 个答案: