如何在屏幕上[水平]制作图像循环

Question

这就是我得到的，但是我在图片中看到了错误。 我有用于UIImageView * bottomGroundContinue的IBOutlets和用于* bottomGround的IBOutlets @implementation viewController

@property (nonatomic, assign) BOOL keepGoing;
@property (nonatomic, strong) UIImageView *bottomGround;
@property (nonatomic, strong) UIImageView *bottomGroundContinue;

- (void)getReady {


    UIImage *theImage = [UIImage imageNamed:@"bottomGround.png"];


    self.bottomGround = [[UIImageView alloc] initWithImage:theImage];
    self.bottomGroundContinue = [[UIImageView alloc] initWithImage:theImage];


    self.bottomGround.frame = self.view.bounds;
    self.bottomGRoundContinue.frame = CGRectOffset(self.view.bounds, self.bottomGround.bounds.size.width, 0.0);

    [self.view addSubview:self.bottomGround];
    [self.view addSubview:self.bottomGroundContinue];
    self.keepGoing = YES;
}

- (void)go {

    CGFloat width = self.bottomGround.bounds.size.width;

    [UIView animateWithDuration:1.0 delay:0.0 options:UIViewAnimationOptionCurveLinear animations:^{
        self.bottomGround.frame = CGRectOffset(self.bottomGround.frame, -width, 0);
        self.bottomGroundContinue.frame = CGRectOffset(self.bottomGroundContinue.frame, -width, 0);
    } completion:^(BOOL finished) {

        if (self.keepGoing) {
            // now B is where A began, so swap them and reposition B
            UIImageView *temp = self.bottomGround;
            self.bottomGround  = self.bottomGroundContinue;
            self.bottomGroundContinue = temp;
            self.bottomGroundContinue.frame = CGRectOffset(self.view.bounds, self.view.bounds.size.width, 0.0);
            // recursive call, but we don't want to wind up the stack
            [self performSelector:@selector(go) withObject:nil afterDelay:0.0];
        }
    }];
}

Answer 1

您正在声明@implementation中的属性。你需要在@interface中声明它们。