具有UISwipeGestureRecognizer的UITabBarController

Question

我在UITabBarController上添加了2個ViewController。 因此，當我們單擊“垂直”選項卡時，所有選項卡都已正確切換。 我已將UISwipeGestureRecognizer添加到TabBarController，該功能與從左向右或從右向右滑動TabBar時的功能相同。

點擊這里查看圖片

但是當我嘗試從右向左或從左向右滑動時，並沒有檢測到我的手勢

這是我的TabBarController代碼

#import "TabBarController.h"

@implementation TabBarController
-(void)viewDidLoad{

    UISwipeGestureRecognizer *leftToRightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftToRightSwipeDidFire)];
    leftToRightGesture.direction = UISwipeGestureRecognizerDirectionRight;
    [self.tabBarController.tabBar addGestureRecognizer:leftToRightGesture];

    UISwipeGestureRecognizer *rightToLeftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightToLeftSwipeDidFire)];
    rightToLeftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.tabBarController.tabBar addGestureRecognizer:rightToLeftGesture];

}

- (void)leftToRightSwipeDidFire {
    UITabBar *tabBar = self.tabBarController.tabBar;
    NSInteger index = [tabBar.items indexOfObject:tabBar.selectedItem];
    if (index > 0) {
        self.tabBarController.selectedIndex = index - 1;
    } else {
        return;
    }
}
- (void)rightToLeftSwipeDidFire {
    UITabBar *tabBar = self.tabBarController.tabBar;
    NSInteger index = [tabBar.items indexOfObject:tabBar.selectedItem];
    if (index < tabBar.items.count - 1) {
        self.tabBarController.selectedIndex = index + 1;
    } else {
        return;
    }
}

@end

Answer 1

已解決:::無法檢測到滑動的原因是因為它必須是IBAction。

-(void)viewDidLoad{
    [super viewDidLoad];



    NSString *ipAddressText = @"192.168.211.62";
    NSString *portText = @"12";

    NSLog(@"Setting up connection to %@ : %i", ipAddressText, [portText intValue]);
    CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, (__bridge CFStringRef) ipAddressText, [portText intValue], &readStream, &writeStream);

    messages = [[NSMutableArray alloc] init];
    [self open];

    UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedRightButton:)];
    [swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft];
    [self.view addGestureRecognizer:swipeLeft];

    UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedLeftButton:)];
    [swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];
    [self.view addGestureRecognizer:swipeRight];


    // [delegate TCPSOCKET];
    //ViewSwipe *theInstance = [[ViewSwipe alloc]init];
    //[theInstance TCPSOCKET];
}

- (IBAction)tappedRightButton:(id)sender
{
    NSUInteger selectedIndex = [self.tabBarController selectedIndex];

    [self.tabBarController setSelectedIndex:selectedIndex + 1];

    //To animate use this code
    CATransition *anim= [CATransition animation];
    [anim setType:kCATransitionPush];
    [anim setSubtype:kCATransitionFromRight];
    [anim setDuration:1];
    [anim setTimingFunction:[CAMediaTimingFunction functionWithName:
                             kCAMediaTimingFunctionEaseIn]];
    [self.tabBarController.view.layer addAnimation:anim forKey:@"fadeTransition"];
}

- (IBAction)tappedLeftButton:(id)sender
{
    NSUInteger selectedIndex = [self.tabBarController selectedIndex];

    [self.tabBarController setSelectedIndex:selectedIndex - 1];

    CATransition *anim= [CATransition animation];
    [anim setType:kCATransitionPush];
    [anim setSubtype:kCATransitionFromRight];

    [anim setDuration:1];
    [anim setTimingFunction:[CAMediaTimingFunction functionWithName:
                             kCAMediaTimingFunctionEaseIn]];
    [self.tabBarController.view.layer addAnimation:anim forKey:@"fadeTransition"];
}