删除uisearchbar中uitextfield的边框

问题描述

我想自定义UISearchBar控件到一个样式，如下图所示：

I wanna custom the UISearchBar control to a style as showed in the picture below:

首先，我应该删除后台视图，然后在UISearchBar中找到UITextfiled，扩展UITextfiled的框架，删除它的边界。

First I should remove the background view, then find out the UITextfiled in UISearchBar, extend the frame of UITextfiled and remove the boarder of it.

这是我的代码：

UITextField *searchField;

NSUInteger numViews = [self.subviews count];
for(int i = 0; i != numViews; i++) {
    if([[self.subviews objectAtIndex:i] isKindOfClass:[UITextField class]]) { //conform?
        searchField = [self.subviews objectAtIndex:i];
    }
}
if(!(searchField == nil)) {

    [searchField setBorderStyle:UITextBorderStyleNone];
    searchField.frame = self.frame; //modify the frame
}

[[self.subviews objectAtIndex:0]removeFromSuperview]; //remove the background.

结果是UITextField的边框仍然存在。 ：（

The result is the boarder of the UITextField is still there. :(

>

我的问题是：
1.为什么我不能修改UISearchBar的UITextField的外观？

My question is :1.Why can not I modify the appearance of the UITextField of UISearchBar?

2.如何在UISearchBar中删除UITextfield的边界。

2.How to remove the boarder of UITextfield in UISearchBar.

非常感谢！

推荐答案

子类UISearchBar并覆盖layoutSubViews以删除搜索栏背景和文本字段边框子视图：

Subclass UISearchBar and override layoutSubViews to remove the search bar background and the text field border subviews:

- (void)layoutSubviews
{
    [super layoutSubviews];

    for (UIView *subview in self.subviews) {
        // Remove the default background
        if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) {
            [subview removeFromSuperview];
        }

        // Remove the rounded corners
        if ([subview isKindOfClass:NSClassFromString(@"UITextField")]) {
            UITextField *textField = (UITextField *)subview;
            for (UIView *subsubview in textField.subviews) {
               if ([subsubview isKindOfClass:NSClassFromString(@"UITextFieldBorderView")]) {
                    [subsubview removeFromSuperview];
                }
            }
        }
    }
}

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