如何更改UISearchbar取消按钮的文本颜色

Question

我有一个UISearchBar,如下所示.如何更改取消按钮的文本颜色？

Answer 1

刚才提出这个问题,因此我认为提问的人已经找到了解决方案.但是为了防止其他一些碰巧遇到同样的问题.这是我的解决方案.

我有一个带有取消按钮的UISearchBar,只有在点击UISearchBar的文本字段时才会出现.因此,在UISearchBar的子类中覆盖 - (void)layoutSubviews的解决方案对我来说不是一个选项.无论如何,我做了一个UISearchBar(CustomSearchBar)的子类,使用了一个公共方法来设置取消按钮的字体和textColor.当我创建UISearchBar时,我确保搜索栏的textfield委托设置为self,并且创建搜索栏的类实现UITextFieldDelegate协议.当用户点击搜索栏的文本字段时,会通知其委托并调用CustomSearchBar的方法.我在这里做的原因是因为它是取消按钮出现的时刻,因此我知道它在视图层次结构上,我可以进行自定义.

这是代码:

用于在MyRootViewController中创建UISearchBar

CustomSearchBar *searchBar = [[CustomSearchBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 40)];
[searchBar setBarStyle:UIBarStyleDefault];
[searchBar setTintColor:[UIColor whiteColor]];

for (UIView *view in [searchBar subviews]) 
{
    if ([view isKindOfClass:[UITextField class]]) 
    {
        UITextField *searchTextField = (UITextField *)view;
        [searchTextField setDelegate:self];
    }
}

self.searchBar = searchBar;   
[searchBar release];

MyRootViewController中的UITextFieldDelegate(确保它实现了UITextFieldDelegate协议)

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    [self.searchBar setCloseButtonFont:[UIFont fontWithName:@"American Typewriter" size:14] textColor:[UIColor grayColor]];
}

这是UISearchBar子类中的公共方法

- (void)setCloseButtonFont:(UIFont *)font textColor:(UIColor *)textColor
{
    UIButton *cancelButton = nil;

    for(UIView *subView in self.subviews)
    {
        if([subView isKindOfClass:[UIButton class]])
        {
            cancelButton = (UIButton*)subView;
        }
    }

    if (cancelButton)
    {
        /* For some strange reason, this code changes the font but not the text color. I assume some other internal customizations      make this not possible:

        UILabel *titleLabel = [cancelButton titleLabel];
        [titleLabel setFont:font];
        [titleLabel setTextColor:[UIColor redColor]];*/

        // Therefore I had to create view with a label on top:        
        UIView *overlay = [[UIView alloc] initWithFrame:CGRectMake(2, 2, kCancelButtonWidth, kCancelButtonLabelHeight)];
        [overlay setBackgroundColor:[UIColor whiteColor]];
        [overlay setUserInteractionEnabled:NO]; // This is important for the cancel button to work
        [cancelButton addSubview:overlay];

        UILabel *newLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 2, kCancelButtonWidth, kCancelButtonLabelHeight)];
        [newLabel setFont:font];
        [newLabel setTextColor:textColor];
        // Text "Cancel" should be localized for other languages
        [newLabel setText:@"Cancel"]; 
        [newLabel setTextAlignment:UITextAlignmentCenter];
        // This is important for the cancel button to work
        [newLabel setUserInteractionEnabled:NO]; 
        [overlay addSubview:newLabel];
        [newLabel release];
        [overlay release]; 
    }
}

Answer 2

而不是做所有这些花哨的事情只是像这样实现SearchBarTextDidBeginEditing

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
    // only show the status bar’s cancel button while in edit mode sbar (UISearchBar)
    searchBar.showsCancelButton = YES;
    searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
    UIColor *desiredColor = [UIColor colorWithRed:212.0/255.0 green:237.0/255.0 blue:187.0/255.0 alpha:1.0];


    for (UIView *subView in searchBar.subviews){
        if([subView isKindOfClass:[UIButton class]]){
            NSLog(@"this is button type");

            [(UIButton *)subView setTintColor:desiredColor];
            [(UIButton *)subView setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        }
}