iOS中在导航条设置搜索框使用小结
最近在项目开发中用到了搜索框,一般是设置在列表顶部或者导航条上。下面说一下在导航条上使用搜索框的思路,刚开始是直接将CCSearchBar添加到导航条,在viewWillDisappear设置隐藏,在viewWillAppear中设置可见,结果在苹果X上出现页面卡顿的情况。原因可能是进入页面的时候获取焦点,
也可能是状态栏高度设置不准确,总之这个方案会有点问题。我们换另外一个思路,将导航条设置为titleview,这里需要特别注意,如果直接将CCSearchBar赋值给self.navigationItem.titleView,搜索框的长度会不受控制,需要封装一层,将搜索框添加到一个view中,然后将该view赋值给titleview。
- (CCSearchBar *)searchBar{
if (!_searchBar) {
_searchBar = [[CCSearchBar alloc]init];
_searchBar.backgroundColor = [UIColor clearColor];
_searchBar.textfiledBgColor = K_CC_GRAY_BG_COLOR;
_searchBar.placeholder = K_CC_LOCAL_STR(@"home.search");
_searchBar.placeHolderFontSize = 14;
_searchBar.placeHolderTextColor = K_CC_TEXT_GRAY_COLOR;
_searchBar.textPosition = SearchBarTextPositionCenter;
_searchBar.textColor = K_CC_COLOR_STRING(@"17315C");
_searchBar.frame = CGRectMake(0, 5, K_CC_SCREEN_WIDTH-146, 34);
_searchBar.delegate = self;
}
return _searchBar;
}
- (UIView *)toolSearch
{
if (!_toolSearch) {
_toolSearch=[[UIView alloc]initWithFrame:CGRectMake(0, 0, K_CC_SCREEN_WIDTH - 106, 44)];
_toolSearch.backgroundColor = [UIColor clearColor];
[_toolSearch addSubview:self.searchBar];
}
return _toolSearch;
}
self.navigationItem.titleView=self.toolSearch;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.6 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self.searchBar becomeFirstResponder];
});