使图像视图向左移动

Question

What I want is when I press START, the platforms will show, but they will move to the left as well. So How can I do this? Here is the code of what happens when we start the game:

-(IBAction)Start:(id)sender{
    Start.hidden = YES;
    Exit.hidden = YES;
    HighScoreLabel.hidden = NO;
    Heli.hidden = NO;
    PowerUp.hidden = NO;

    Obstacle1.hidden = NO;
    Obstacle2.hidden = NO;
    Platform1.hidden = NO;
    Platform2.hidden = NO;
    Platform3.hidden = NO;
    Platform4.hidden = NO;

    Trap1Cactus1.hidden = NO;
    Trap1Cactus2.hidden = NO;
    Trap2Saw1.hidden = NO;
    Trap2Saw2.hidden = NO;

    WinOrLose.hidden = YES;
    Top.hidden = YES;
    Bottom.hidden = NO;

    TrapUpsideDown.hidden = NO;
    TrapUpsideDown2.hidden = NO;
    SuperJump.hidden = NO;

    SavedFromDeathLabel.hidden = NO;
    ExplosionIfSaved.hidden = NO;

    BirdMovement = [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(ShipMoving) userInfo:nil repeats:YES];


    HigherJump = [NSTimer scheduledTimerWithTimeInterval:0.07 target:self selector:@selector(SuperJumping) userInfo:nil repeats:YES];

    HighTrap.hidden = NO;
}

Answer 1

You do not want to create short duration timers and move your view objects by small increments each time your timer(s) fire. You should look into UIView animation or CAAnimation objects. I would suggest starting out with UIView animation methods that start with animateWithDuration . They are much easier to use than CAAnimation (Core Animation) which is complex, tricky, and not that well documented.