【发布时间】:2015-05-04 20:32:27
【问题描述】:
我正在开发的应用程序中遇到了一个小问题。我想扩展导航栏以支持类似控件的搜索字段。用户将单击导航栏右上角按钮中的搜索按钮,然后导航栏将展开以显示具有搜索和取消按钮的搜索字段。我使用此实现实现了以下目标:
#import <UIKit/UIKit.h> //Xib header
@interface SearchForm : UIView
@property (weak, nonatomic) IBOutlet UITextField *txtSearchField;
@property (weak, nonatomic) IBOutlet UIButton *btnCancel;
- (IBAction)btnCancel:(id)sender;
@property (weak, nonatomic) IBOutlet UIButton *btnSearch;
- (IBAction)btnSearch:(id)sender;
@end
#import "SearchForm.h" //Xib implementation
@interface SearchForm () <UITextFieldDelegate>
{
}
@end
@implementation SearchForm
- (id)initWithCoder:(NSCoder *)aDecoder
{
if ((self = [super initWithCoder:aDecoder]))
{
self.txtSearchField.delegate = self;
}
return self;
}
- (IBAction)btnCancel:(id)sender
{
DLog();
}
- (IBAction)btnSearch:(id)sender
{
}
#pragma mark Text Field Delegate
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
//TODO:Callback to feed.
return YES;
}
//Main View Controller
-(SearchForm *)feedSearchForm
{
if(!_feedSearchForm)
{
_feedSearchForm = [[[NSBundle mainBundle] loadNibNamed:@"SearchForm" owner:self options:nil] objectAtIndex:0];
//I think this frame is the problem but I'm not sure
_feedSearchForm.frame = CGRectMake(0, self.navigationController.navigationBar.frame.size.height, 320, STREAM_LIST_TOP_CONSTRAINT_HEIGHT);
}
return _feedSearchForm;
}
//Exposes the search field
-(void)expandSearchField:(id)sender
{
tableVerticalVariableConstraint.constant = STREAM_LIST_TOP_CONSTRAINT_HEIGHT;
[UIView animateWithDuration:0.4 animations:^{
[self.navigationController.navigationBar addSubview:self.feedSearchForm];
[self.view layoutIfNeeded];
}];
}
控件内部包含一个 UITextField。
问题
但是,即使此代码完全符合我的要求,但当我在文本字段内单击时,键盘永远不会显示。这就像触摸没有被注册。我尝试注释掉我明确设置 xib 框架的代码,当我这样做时,触摸事件被识别,但 xib 位于导航栏的顶部,看起来不像是栏的自然扩展我需要的。任何建议或提示将不胜感激。
【问题讨论】:
标签: ios objective-c iphone