我有一个图像视图，可以旋转图像以面向不同的方向。我试图找出按下按钮时如何反转旋转。图像视图也可以向前移动，我已经找到了如何扭转这一举动。我基本上想做我在倒车前进动作时所做的事情，除非是为了转动图像。
前进代码：
- (IBAction)moveForward:(id)sender
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Illegal Move!" message:@"You can't move forward" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
UIAlertView *stoneWallAlert = [[UIAlertView alloc]initWithTitle:@"Path Blocked" message:@"There is a stone wall in your way!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
BOOL fullyContained = CGRectContainsRect(gameBoard.bounds, turtle.frame);
moveForwardCards--;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
if (moveForwardCards == 0)
{
forwardButton.enabled = NO;
}
if (turtle.image.imageOrientation == UIImageOrientationRight)
{
// If turtle will stay within the game board when moved, move it forward
if (fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y + 90, 75, 75);
NSString *addY = @"y+90";
[previousMoves addObject:addY];
fullyContained = CGRectContainsRect(gameBoard.bounds, turtle.frame);
// If turtle will move outside of game board when moved, do not move it
if (!fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y - 90, 75, 75);
[previousMoves removeLastObject];
[alert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// Loop through array of stone walls and check for an intersection with the turtle.
// If there is an intersection, do not move the turtle
for (UIImageView *stoneWall in self.stoneWallsArray)
{
if (CGRectIntersectsRect(turtle.frame, stoneWall.frame))
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y - 90, 75, 75);
[previousMoves removeLastObject];
[stoneWallAlert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
}
}
}
else if (turtle.image.imageOrientation == UIImageOrientationLeft)
{
// If turtle will stay within the game board when moved, move it forward
if (fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y - 90, 75, 75);
NSString *minusY = @"y-90";
[previousMoves addObject:minusY];
fullyContained = CGRectContainsRect(gameBoard.bounds, turtle.frame);
// If turtle will move outside of game board when moved, do not move it
if (!fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y + 90, 75, 75);
[previousMoves removeLastObject];
[alert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// Loop through array of stone walls and check for an intersection with the turtle.
// If there is an intersection, do not move the turtle
for (UIImageView *stoneWall in self.stoneWallsArray)
{
if (CGRectIntersectsRect(turtle.frame, stoneWall.frame))
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y + 90, 75, 75);
[previousMoves removeLastObject];
[stoneWallAlert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
}
}
}
else if (turtle.image.imageOrientation == UIImageOrientationUp)
{
// If turtle will stay within the game board when moved, move it forward
if (fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x + 90, turtle.frame.origin.y, 75, 75);
NSString *addX = @"x+90";
[previousMoves addObject:addX];
fullyContained = CGRectContainsRect(gameBoard.bounds, turtle.frame);
// If turtle will move outside of game board when moved, do not move it
if (!fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x - 90, turtle.frame.origin.y, 75, 75);
[previousMoves removeLastObject];
[alert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// Loop through array of stone walls and check for an intersection with the turtle.
// If there is an intersection, do not move the turtle
for (UIImageView *stoneWall in self.stoneWallsArray)
{
if (CGRectIntersectsRect(turtle.frame, stoneWall.frame))
{
turtle.frame = CGRectMake(turtle.frame.origin.x - 90, turtle.frame.origin.y, 75, 75);
[previousMoves removeLastObject];
[stoneWallAlert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
}
}
}
else if (turtle.image.imageOrientation == UIImageOrientationDown)
{
// If turtle will stay within the game board when moved, move it forward
if (fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x - 90, turtle.frame.origin.y, 75, 75);
NSString *minusX = @"x-90";
[previousMoves addObject:minusX];
fullyContained = CGRectContainsRect(gameBoard.bounds, turtle.frame);
// If turtle will move outside of game board when moved, do not move it
if (!fullyContained)
{
turtle.frame = CGRectMake(turtle.frame.origin.x + 90, turtle.frame.origin.y, 75, 75);
[previousMoves removeLastObject];
[alert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// Loop through array of stone walls and check for an intersection with the turtle.
// If there is an intersection, do not move the turtle
for (UIImageView *stoneWall in self.stoneWallsArray)
{
if (CGRectIntersectsRect(turtle.frame, stoneWall.frame))
{
turtle.frame = CGRectMake(turtle.frame.origin.x + 90, turtle.frame.origin.y, 75, 75);
[previousMoves removeLastObject];
[stoneWallAlert show];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
}
}
}
NSLog(@"turtle frame: %@", NSStringFromCGRect(turtle.frame));
}
转弯代码：
- (IBAction)turnLeft:(id)sender
{
turnLeftCards--;
leftLabel.text = [NSString stringWithFormat:@"%i left", turnLeftCards];
if (turnLeftCards == 0)
{
leftButton.enabled = NO;
}
UIImage *newImage;
switch (turtle.image.imageOrientation)
{
case UIImageOrientationUp:
newImage = [UIImage imageWithCGImage:[turtle.image CGImage] scale:1.0f orientation:UIImageOrientationLeft];
turtle.contentMode = UIViewContentModeScaleAspectFit;
break;
case UIImageOrientationLeft:
newImage = [UIImage imageWithCGImage:[turtle.image CGImage]scale:1.0f orientation:UIImageOrientationDown];
turtle.contentMode = UIViewContentModeScaleAspectFill;
break;
case UIImageOrientationDown:
newImage = [UIImage imageWithCGImage:[turtle.image CGImage] scale:1.0f orientation:UIImageOrientationRight];
turtle.contentMode = UIViewContentModeScaleAspectFit;
break;
case UIImageOrientationRight:
newImage = [UIImage imageWithCGImage:[turtle.image CGImage]scale:1.0f orientation:UIImageOrientationUp];
turtle.contentMode = UIViewContentModeScaleAspectFill;
break;
default:
break;
}
turtle.image = newImage;
}
逆转前进的代码：
- (IBAction)bugTapped:(id)sender
{
// If the last move made the turtle move up on the y-axis, reverse that move
if ([previousMoves.lastObject isEqual:@"y+90"])
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y - 90, 75, 75);
[previousMoves removeLastObject];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// If the last move made the turtle move down on the y-axis, reverse that move
else if ([previousMoves.lastObject isEqual:@"y-90"])
{
turtle.frame = CGRectMake(turtle.frame.origin.x, turtle.frame.origin.y + 90, 75, 75);
[previousMoves removeLastObject];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// If the last move mad the turtle move left on the x-axis, reverse that move
else if ([previousMoves.lastObject isEqual:@"x+90"])
{
turtle.frame = CGRectMake(turtle.frame.origin.x - 90, turtle.frame.origin.y, 75, 75);
[previousMoves removeLastObject];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
// If the last move made the turtle move right on the x-axis, reverse that move
else if ([previousMoves.lastObject isEqual:@"x-90"])
{
turtle.frame = CGRectMake(turtle.frame.origin.x + 90, turtle.frame.origin.y, 75, 75);
[previousMoves removeLastObject];
moveForwardCards++;
forwardLabel.text = [NSString stringWithFormat:@"%i left", moveForwardCards];
}
}