Question

提前致谢。我想添加两个tabbar控制器，一个在顶部，另一个在底部，如 enter image description here 这个。它是否可能在iPhone上。如果可能，任何人都知道请帮助我这样做。

Answer 1

据我所知，应该可以这样做。只需在视图中添加一个，将另一个添加到rootviewcontroller，在不同的位置，您应该能够链接到不同的位置。如果没有，只需拉起photoshop，“制作”标签栏并在其下面放置按钮以模拟效果。

PS，萨曼莎很华丽！哈哈

Answer 2

UITabBar很难在任何方向上进行修改。

很多easyer将用您自己的自定义替换它。 Offcorse，它可以是你喜欢的任何东西。看看这个：

//CustomTabBar.h:

#import <Foundation/Foundation.h>

@interface CustomTabBar : UITabBarController {
    UIButton *SHOPPING;
    UIButton *DINING;
    UIButton *MAPS;
    UIButton *PARKING;
    UIButton *PROMOTION;
    UIImageView *BarBackground;
}
-(void) addCustomElements;
-(void) hideExistingTabBar;
-(void) selectTab:(int)tabID;
@end

//CustomTabBar.m:
#import "CustomTabBar.h"

@implementation CustomTabBar

- (void)viewDidAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [self hideExistingTabBar];
    [self addCustomElements];
}

- (void)hideExistingTabBar
{
    for(UIView *view in self.view.subviews)
    {
        if([view isKindOfClass:[UITabBar class]])
        {
            view.hidden = YES;
            break;
        }
    }
}

- (void)dealloc {
    [super dealloc];
}

-(void)addCustomElements
{
    //in your case you will need 2 bars, but I needed only one. Just add another one.
    BarBackground = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"BarBackground.jpg"]];
    BarBackground.frame = CGRectMake(0, 430, 320, 50);

    // Initialise our two images
    UIImage *btnImage = [UIImage imageNamed:@"BarShipping.png"];
    UIImage *btnImageSelected = [UIImage imageNamed:@"BarShipping.png"];

    SHOPPING = [UIButton buttonWithType:UIButtonTypeCustom]; //Setup the button
    SHOPPING.frame = CGRectMake(0, 430, 64, 50); // Set the frame (size and position) of the button)
    [SHOPPING setBackgroundImage:btnImage forState:UIControlStateNormal]; // Set the image for the normal state of the button
    [SHOPPING setBackgroundImage:btnImageSelected forState:UIControlStateSelected]; // Set the image for the selected state of the button
    [SHOPPING setTag:0]; // Assign the button a "tag" so when our "click" event is called we know which button was pressed.
    [SHOPPING setSelected:true]; // Set this button as selected (we will select the others to false as we only want Tab 1 to be selected initially

    // Now we repeat the process for the other buttons
    btnImage = [UIImage imageNamed:@"BarDinning.png"];
    btnImageSelected = [UIImage imageNamed:@"BarDinning.png"];
    DINING = [UIButton buttonWithType:UIButtonTypeCustom];
    DINING.frame = CGRectMake(64, 430, 64, 50);
    [DINING setBackgroundImage:btnImage forState:UIControlStateNormal];
    [DINING setBackgroundImage:btnImageSelected forState:UIControlStateSelected];
    [DINING setTag:1];
    <...>


    // Add my new buttons to the view
    [self.view addSubview:BarBackground];
    [self.view addSubview:SHOPPING];
    [self.view addSubview:DINING];
    <...>


    // Setup event handlers so that the buttonClicked method will respond to the touch up inside event.
    [SHOPPING addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [DINING addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    <...>
}

- (void)selectTab:(int)tabID
{
    //if you will need navigation controller, or something, you will need to work on this part, or it will just crash.
    switch(tabID)
    {
        case 0:
            [SHOPPING setSelected:true];
            [DINING setSelected:false];
            <...>
            break;
        case 1:
            [SHOPPING setSelected:false];
            [DINING setSelected:true];
            <...>
            break;
        <...>
    }   

    if (self.selectedIndex == tabID) {
        UINavigationController *navController = (UINavigationController *)[self selectedViewController];
        [navController popToRootViewControllerAnimated:YES];
    } else {
        self.selectedIndex = tabID;
    }

}

- (void)buttonClicked:(id)sender
{
    int tagNum = [sender tag];
    [self selectTab:tagNum];
}

@end

然后，像往常一样添加和使用TabBarController。你唯一要做的就是将TabBarController的类改为你的xib文件中的CastomTabBar。（或者使用此类分配它，如果你在programmaticaly中添加它：UITabBarController * tb = [[CustomTabBar alloc] init];）还有一件事：有一个地方，为tabBar提供，所以你的视图通常会重新调整大小。如果您使用此代码，它也会使用，但在通常的tabBar位置 - 在底部。对于第二个tabBar，您需要自己准备好位置。希望，这会有所帮助。

与iphone中的标签栏控件有关

2 个答案: