iphone - 如何在 UINavigationController 中的所有 View 前面显示一个 UIButton？

Question

我有一个 UIButton，我想在我的 UINavigationController 的所有 viewControllers 前面的相同位置显示它>，与 UINavigationBar 的方式非常相似 - 但在这种情况下，我希望按钮 float 在屏幕的左下角，如下所示:

我可以尝试手动将它添加到每个 viewController，但我更愿意添加一次然后忘记它。

将按钮作为 subview 添加到 UIWindow 似乎不起作用 - 它在 rootViewController 后面结束。

更新:我已经想出了一个办法，但是因为它涉及到 iOS 7，所以在 NDA 解除之前我不能在这里发布解决方案。好消息是，实现这一点相当简单!一旦可以分享，我会发布一些内容。

Answer 1

创建一个NSObject类buttonPanel并分配按钮，你可以调用按钮面板如下:

buttonPanel * buttonPanel = [[buttonPanel alloc] init];
buttonPanel.delegate = self;
[buttonPanel showButtonWithNavigationController:self.navigationController inView:self.parentViewController.view];

按钮面板类:

//ButtonPanel.h
#import <Foundation/Foundation.h>

@class ButtonPanel;

@protocol ButtonPanelDelegate <NSObject>

-(void) ButtonPanel:(ButtonPanel*) buttonPanel ;

@end

@interface ChatMessagePanel : NSObject<UIActionSheetDelegate> {

    UINavigationController *navigationController;

    id<ButtonPanelDelegate> delegate;
}

@property(nonatomic,retain) UINavigationController *navigationController;
@property (nonatomic,retain) id<ButtonPanelDelegate> delegate;

-(void)showButtonWithNavigationController:(UINavigationController*) navigationController inView:(UIView*) view;

@end


//  ButtonPanel.m


#import "ChatMessagePanel.h"

@implementation ButtonPanel

@synthesize userListModal,delegate,navigationController;

-(void)showMessageWithNavigationController:(UINavigationController*) _navigationController inView:(UIView*) view
{
    self.navigationController = _navigationController;

    baseViewWidth = view.frame.size.width;
    baseViewHeight = view.frame.size.height;

    incomingRequestActionSheet = [[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil, nil];
    [incomingRequestActionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
    [incomingRequestActionSheet showInView:view];


    UIButton *blockUserBttn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 80, 40)];
    [blockUserBttn setTitle:NSLocalizedString(@"BLOCK_USERS",@"") forState:UIControlStateNormal];
    [blockUserBttn setBackgroundColor:[UIColor clearColor]];
    [blockUserBttn addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];


    UIBarButtonItem *blockUserBarBttn = [[UIBarButtonItem alloc] initWithCustomView:blockUserBttn];

    [optionToolBar setItems:[NSArray arrayWithObjects:blockUserBarBttn, nil]];
    [incomingRequestActionSheet addSubview:optionToolBar];

}

-(void)buttonAction:(id) sender
{

}

@end