Question

在UISearchBar控件中，是否可以将键盘的搜索键标题更改为完成？

Answer 1

对于名为table searchbar的搜索栏：

// Set the return key and keyboard appearance of the search bar
        for (UIView *searchBarSubview in [tableSearchBar subviews]) {

            if ([searchBarSubview conformsToProtocol:@protocol(UITextInputTraits)]) {

                @try {

                    [(UITextField *)searchBarSubview setReturnKeyType:UIReturnKeyDone];
                    [(UITextField *)searchBarSubview setKeyboardAppearance:UIKeyboardAppearanceAlert];
                }
                @catch (NSException * e) {

                    // ignore exception
                }
            }
        }

Answer 2

至少对于iOS 8，只需：

    [self.searchBar setReturnKeyType:UIReturnKeyDone];

Answer 3

从iOS 7 beta 5开始，Run Loop的回答对我不起作用，但是这样做了：

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

Answer 4

另一个有用的提示， Run Loop 代码（在“@try”中）部分。

当文本字段为空时，启用“完成”按钮：

UITextField *tf = (UITextField *)searchBarSubview;
tf.enablesReturnKeyAutomatically = NO;

Answer 5

让Swift更改UISearchBar的返回键

searchBar.returnKeyType = UIReturnKeyType.done

枚举可用如下

public enum UIReturnKeyType : Int {

    case default
    case go
    case google
    case join
    case next
    case route
    case search
    case send
    case yahoo
    case done
    case emergencyCall
    @available(iOS 9.0, *)
    case continue
}

Answer 6

提醒一下！如果您将searchBar保留为第一响应者，则在更改returnKeyType之后，您需要关闭键盘并再次弹出以查看更改。

search.resignFirstResponder()
searchBar.returnKeyType = UIReturnKeyType.Done
search.becomeFirstResponder()

Answer 7

由于它是一个带有可选方法的协议，因此您应该分别测试每个方法而不是尝试捕获。

for (UIView *searchBarSubview in searchBar.subviews)
{
    if ([searchBarSubview conformsToProtocol:@protocol(UITextInputTraits)])
    {
        // keyboard appearance
        if ([searchBarSubview respondsToSelector:@selector(setKeyboardAppearance:)])
            [(id<UITextInputTraits>)searchBarSubview setKeyboardAppearance:UIKeyboardAppearanceAlert];
        // return key 
        if ([searchBarSubview respondsToSelector:@selector(setReturnKeyType:)])
            [(id<UITextInputTraits>)searchBarSubview setReturnKeyType:UIReturnKeyDone];
        // return key disabled when empty text
        if ([searchBarSubview respondsToSelector:@selector(setEnablesReturnKeyAutomatically:)])
            [(id<UITextInputTraits>)searchBarSubview setEnablesReturnKeyAutomatically:NO];
        // breaking the loop when we are done
        break;
    }
}

这适用于iOS＆lt; = 6.对于iOS＆gt; = 7，您需要循环searchBar.subviews[0].subviews。

Answer 8

由于警报式键盘是半透明的，我可以在后面看到我的观点。它看起来不太好，因为我在键盘后面有多个元素，这使得键很难脱颖而出。我想要一个全黑键盘。

因此，当编辑文本时，我将黑色UIImageView动画到键盘后面的位置。这给出了全黑键盘的外观。

- (void)textFieldDidBeginEditing:(UITextField *)textField {

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.25]; 

    blackBoxForKeyboard.frame = CGRectMake(0, 377, 320, 216);
    [UIView commitAnimations]; 

}

Answer 9

我尝试了这里显示的所有解决方案，但没有一个适用于我的UISearchBar（xcode5为iOS7编译）。我最终得到了这个适用于我的递归函数：

- (void)fixSearchBarKeyboard:(UIView*)searchBarOrSubView {

    if([searchBarOrSubView conformsToProtocol:@protocol(UITextInputTraits)]) {
        if ([searchBarOrSubView respondsToSelector:@selector(setKeyboardAppearance:)])
            [(id<UITextInputTraits>)searchBarOrSubView setKeyboardAppearance:UIKeyboardAppearanceAlert];
        if ([searchBarOrSubView respondsToSelector:@selector(setReturnKeyType:)])
            [(id<UITextInputTraits>)searchBarOrSubView setReturnKeyType:UIReturnKeyDone];
        if ([searchBarOrSubView respondsToSelector:@selector(setEnablesReturnKeyAutomatically:)])
            [(id<UITextInputTraits>)searchBarOrSubView setEnablesReturnKeyAutomatically:NO];
    }

    for(UIView *subView in [searchBarOrSubView subviews]) {
        [self fixSearchBarKeyboard:subView];
    }
}

然后我这样称呼它：

_searchBar = [[UISearchBar alloc] init];
[self fixSearchBarKeyboard:_searchBar];

Answer 10

仅用于涵盖所有iOS版本：

public class MyClass {
  public MyClass() {
    Value = 0.0;
  }

  public Double? Value {
    get;
    set;
  }
}

...

MyClass test = new MyClass();

ApplyNullsForZeroes(test);

if (test.Value == null)
  Console.Write("It's null now");

更改UISearchBar /键盘搜索按钮标题

10 个答案: