我正在研究一个应用程序,在左侧有一个“抽屉”会非常有益。我正在做一些初步的测试,看看我是如何最好地完成这个的,而且我有一些非常基本的麻烦。iOS:滑动UIView开启/关闭屏幕
我的设置
1.我使用的是单视图应用程序模板在Xcode 4
2.要在厦门国际银行的“主/边框”的看法,我添加了2个UIViews(LeftPanel和RightPanel)和一个UIButton(ShowHideButton)。
3.我已将LeftPanel绿色和RightPanel蓝色上色以提高可视性。
4.加载视图时,两个面板均可见,并且UIButton具有“隐藏面板”文本。
5.按下按钮后,LeftPanel应滑出屏幕(向左)并且RightPanel应展开以占据其原始空间以及LeftPanel腾空的空间。
6.此时,ShowHideButton应将其文本更改为“显示面板”。
7.再次按下按钮时,LeftPanel应滑回屏幕(从左侧),RightPanel应收缩以将其原始空间“缩回”。
8.此时,ShowHideButton应将其文本更改回“隐藏面板”。
我正在使用animateWithDuration:animations:completion:
实现动画。到目前为止,转换OFF屏幕工作正常(实际上很好,实际上)。
让我感到困扰的是,当我尝试将LeftPanel“返回”时,我得到一个EXC_BAD_ACCESS。我已经在下面发布了我的代码,并且已经看过它,但是我确实无法看到正在发布的内容(或导致EXC_BAD_ACCESS的任何内容)。
DrawerTestingViewController.h
#import <UIKit/UIKit.h>
typedef enum {
kHidden,
kShown
} PanelState;
@interface DrawerTestingViewController : UIViewController {
PanelState currentState;
UIButton *showHideButton;
UIView *leftPanel;
UIView *rightPanel;
}
@property (assign, nonatomic) PanelState CurrentState;
@property (strong, nonatomic) IBOutlet UIButton *ShowHideButton;
@property (strong, nonatomic) IBOutlet UIView *LeftPanel;
@property (strong, nonatomic) IBOutlet UIView *RightPanel;
- (IBAction)showHidePressed:(id)sender;
@end
DrawerTestingViewController.m
#import "DrawerTestingViewController.h"
@implementation DrawerTestingViewController
@synthesize CurrentState = currentState;
@synthesize LeftPanel = leftPanel;
@synthesize RightPanel = rightPanel;
@synthesize ShowHideButton = showHideButton;
#pragma mark - My Methods
- (IBAction)showHidePressed:(id)sender
{
switch ([self CurrentState]) {
case kShown:
// Hide the panel and change the button's text
// 1. Hide the panel
[UIView animateWithDuration:0.5
animations:^{
// b. Move left panel from (0, 0, w, h) to (-w, 0, w, h)
CGRect currLeftPanelRect = [[self LeftPanel] frame];
currLeftPanelRect.origin.x = -1 * currLeftPanelRect.size.width;
[[self LeftPanel] setFrame:currLeftPanelRect];
// c. Expand right panel from (x, 0, w, h) to (0, 0, w + x, h)
CGRect currRightPanelRect = [[self RightPanel] frame];
currRightPanelRect.origin.x = 0;
currRightPanelRect.size.width += currLeftPanelRect.size.width;
[[self RightPanel] setFrame:currRightPanelRect];}
completion:NULL];
// 2. Change the button's text
[[self ShowHideButton] setTitle:@"Show Panel" forState:UIControlStateNormal];
// 3. Flip [self CurrentState]
[self setCurrentState:kHidden];
break;
case kHidden:
// Show the panel and change the button's text
// 1. Show the panel
[UIView animateWithDuration:0.5
animations:^{
// b. Move left panel from (-w, 0, w, h) to (0, 0, w, h)
CGRect currLeftPanelRect = [[self LeftPanel] frame];
currLeftPanelRect.origin.x = 0;
[[self LeftPanel] setFrame:currLeftPanelRect];
// c. Expand right panel from (0, 0, w, h) to (leftWidth, 0, w - leftWidth, h)
CGRect currRightPanelRect = [[self RightPanel] frame];
currRightPanelRect.origin.x = currLeftPanelRect.size.width;
currRightPanelRect.size.width -= currLeftPanelRect.size.width;
[[self RightPanel] setFrame:currRightPanelRect];}
completion:NULL];
// 2. Change the button's text
[[self ShowHideButton] setTitle:@"Hide Panel" forState:UIControlStateNormal];
// 3. Flip [self CurrentState]
[self setCurrentState:kShown];
break;
default:
break;
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self setCurrentState:kShown];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
switch ([self CurrentState]) {
case kShown:
[[self ShowHideButton] setTitle:@"Hide Panel" forState:UIControlStateNormal];
break;
case kHidden:
[[self ShowHideButton] setTitle:@"Show Panel" forState:UIControlStateNormal];
break;
default:
break;
}
}
@end
我缺少的东西超级基本?任何人都可以帮忙吗?
谢谢!
编辑: 我试过2个更多的东西:
1.这个问题似乎涉及到把屏幕上的屏幕外的视图,与LeftPanel出发屏幕带给我的同样的问题。
2.单步执行代码会导致Xcode(Lion的4 Beta版)崩溃。以下是详细信息(每个崩溃都相同):
/SourceCache/DVTFoundation/DVTFoundation-867/Framework/Classes/FilePaths/DVTFilePath中的ASSERTION FAILURE。米:373 详细说明:空字符串不是有效路径 对象: 方法:+ _filePathForParent:fileSystemRepresentation:长度:allowCreation: 主题:{名称=(空),NUM = 55} 提示:无 回溯: 0 0x00000001068719a6 - [IDEAssertionHandler handleFailureInMethod:对象:文件名:LINENUMBER:MessageFormat中:参数:(在IDEKit) 1 0x0000000105f3e324 _DVTAssertionFailureHandler(在DVTFoundation) 2 0x0000000105edd16f + [DVTFilePath _filePathForParent:fileSystemRepresentation:长度:allowCreation:](在DVTFoundation) 3 0x0000000105edcd4d + [DVTFilePath _filePathForParent:pathString:](在DVTFoundation中) 4 0x0000000105ede141 + [DVTFilePath filePathForPathStrin克:](在DVTFoundation) 5 0x00000001064a8dde - [IDEIndex queryProviderForFile:高优先级:(在IDEFoundation) 6 0x000000010655193b - [IDEIndex(IDEIndexQueries)symbolsMatchingName:inContext的:withCurrentFileContentDictionary:](在IDEFoundation) 7 0x000000010aca6166 __68- [IDESourceCodeEditor symbolsForExpression :INQUEUE:completionBlock:] _ block_invoke_01561(在IDESourceEditor) 8 0x00007fff93fb490a _dispatch_call_block_and_release(在libdispatch.dylib) 9 0x00007fff93fb615a _dispatch_queue_drain(在libdispatch.dylib) 10 0x00007fff93fb5fb6 _dispatch_queue_invoke(在libdispatch.dylib) 11 0x00007fff93fb57b0 _dispatch_worker_thread2(在libdispatch.dylib ) 12 0x00007fff8bb5e3da _pthread_wqthread(在libsystem_c.dylib中) 13 0x00007fff8bb5fb85 start_wqthread(在libsystem_c.dylib)
更新:屏幕快照
面板中显示(启动状态)
面板隐藏(按下按钮后成功转型)
错误:按下按钮,再次导致故障