UISearchBar文本字段中的自定义清除按钮

Question

我试过了:

UITextField *searchtextfield = [searchBar.subviews objectAtIndex:1];
    UIButton *cButton = [UIButton buttonWithType:UIButtonTypeCustom];
    cButton.frame = CGRectMake(0, 0, 20 , 20);
    cButton.backgroundColor = [UIColor clearColor];
    [cButton setImage:[UIImage imageNamed:@"x-button"] forState:UIControlStateNormal];//your button image.
    cButton.contentMode = UIViewContentModeScaleToFill;
    [cButton addTarget:self action:@selector(xButtonPressed) forControlEvents:UIControlEventTouchUpInside];//This is the custom event
    [searchtextfield setRightView:cButton];
    [searchtextfield setRightViewMode:UITextFieldViewModeWhileEditing];

但它不能很好地工作......它显示自定义按钮,但是当你输入一些东西时,旧的东西会回来......

我怎样才能做到这一点？

Answer 1

如果要在UISearchBar中设置自定义清除按钮,请尝试以下操作:

[[UISearchBar appearance] setImage:[UIImage imageNamed:@"MyClearButton.png"] forSearchBarIcon:UISearchBarIconClear state:UIControlStateNormal];

不要忘记为其设置图像 UIControlStateHighlighted

[[UISearchBar appearance] setImage:[UIImage imageNamed:@"HighlightedClearButton.png"] forSearchBarIcon:UISearchBarIconClear state:UIControlStateHighlighted];

Answer 2

您需要以下内容

[searchBar setImage:[UIImage imageNamed:@"image1"] forSearchBarIcon:UISearchBarIconClear state:UIControlStateHighlighted];
[searchBar setImage:[UIImage imageNamed:@"image2"] forSearchBarIcon:UISearchBarIconClear state:UIControlStateNormal];

强烈建议从UIControlStateHighlighted开始按此顺序放置字符串, 以防您想使用相同的图像:image1 = image2 = image.

在iOS7中,很奇怪,但事实是UIControlStateNormal和UIControlStateHighlighted的直接顺序不起作用.

Answer 3

您可以隐藏取消按钮searchBarTextDidBeginEditing

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
    [searchBar setShowsCancelButton:NO animated:YES];
}  

最令人惊奇的是，您还可以隐藏清除按钮

UITextField *textField=(UITextField*)[[searchBar subviews]objectAtIndex:1];
textField.clearButtonMode=UITextFieldViewModeNever; 

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