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我想在我正在開發的演示項目中實現高分標籤。
我宣佈整數和長整數如下：爲什麼我的高分標籤只更新一次？
SKLabelNode *_scoreLabel;
int _meter;
SKLabelNode *_highScoreLabel;
NSInteger _meter1;
然後在- (id)initWithSize:(CGSize)size我補充申報的標籤，並添加nsuser默認：
[self initScoreLabel];
[self initHighScoreLabel];
_meter1 = [[NSUserDefaults standardUserDefaults] integerForKey:@"HighScoreSaved"];
if (_meter > _meter1) {
[[NSUserDefaults standardUserDefaults] setInteger:_meter1 forKey:@"HighScoreSaved"];
}
這是我怎麼添加標籤太：
- (void)initHighScoreLabel {
_meter1 = 0;
_highScoreLabel = [SKLabelNode labelNodeWithFontNamed:@"Thonburi-Bold"];
_highScoreLabel.text = @"0 High Score";
_highScoreLabel.fontSize = 20.0;
// _scoreLabel.verticalAlignmentMode = SKLabelHorizontalAlignmentModeRight;// | SKLabelVerticalAlignmentModeBaseline;
_highScoreLabel.position = CGPointMake(450, self.frame.size.height - _highScoreLabel.frame.size.height * 1.5);
[self addChild:_highScoreLabel];
}
然後在game over我加了高分：
_meter1 = [[NSUserDefaults standardUserDefaults] integerForKey:@"HighScoreSaved"];
if (_meter > _meter1) {
[[NSUserDefaults standardUserDefaults] setInteger:_meter forKey:@"HighScoreSaved"];
}
，最後在- (void)update:(NSTimeInterval)currentTime我想補充更新內容如下：
- (void)update:(NSTimeInterval)currentTime {
if (_isGameOver) {
return;
}
if (_lastUpdateTime) {
_dt = currentTime - _lastUpdateTime;
} else {
_dt = 0;
}
_lastUpdateTime = currentTime;
// Runner faster than normal
if (_runnerState == incredible) {
_meter += INCREDIBLE_BG_POINTS_PER_SEC/BG_POINTS_PER_SEC;
_meter1 += INCREDIBLE_BG_POINTS_PER_SEC/BG_POINTS_PER_SEC;
} else {
++_meter;
++_meter1;
}
_scoreLabel.text = [NSString stringWithFormat:@"%d Meters", _meter];
_highScoreLabel.text = [NSString stringWithFormat:@"%li High Score",(long) _meter1];
[self checkCollisions];
}
標籤在正確的位置顯示出來，並增加了加分的高分。
但是隻有在玩家死亡後纔有一次。
玩家第一次死亡時，高分更新，但如果玩家第二次死亡，高分僅顯示第一次更新。
有人能幫我理解我做錯了什麼嗎？
編輯：
我沒有加入一些苦幹，一切都燒成的正確途徑。分數更新和高分加起來但仍然只有一次。這裏是整個遊戲場景類。任何人都可以看到我做錯了嗎？
#import "MyScene.h"
#import "SKTAudio.h"
#import "Levels.h"
#import "StartScene.h"
#import "EndScene.h"
// the position X of the runner on the screen
static const float RUNNER_X = 120.0;
static const float RUNNER_HEIGHT = 56.0;
static const float JUMP_HEIGHT = 100.0;
// background scrolling speed
static const float BG_POINTS_PER_SEC = 200.0;
static const float INCREDIBLE_BG_POINTS_PER_SEC = 600.0;
static const int COINS_PER_MAP = 10;
static const int ROCKS_PER_MAP = 2;
static const float BG_WIDTH = 1440;
static const int COIN_RANDOM_FACTOR = (int) (BG_WIDTH/COINS_PER_MAP * 2);
static const int ROCK_RANDOM_FACTOR = (int) (BG_WIDTH/ROCKS_PER_MAP * 2);
#define BG_NAME @"bg"
#define GROUND_NAME @"ground"
#define COIN_NAME @"coin"
#define ROCK_NAME @"rock"
#define RUNNER_ANIMATION_KEY @"runnerAnimation"
#define RUNNER_EMITTER @"runnerEmitter"
enum RunnerState {
running,
jumping,
crouching,
incredible
};
static inline CGPoint CGPointAdd(const CGPoint a,
const CGPoint b) {
return CGPointMake(a.x + b.x, a.y + b.y);
}
static inline CGPoint CGPointMultiplyScalar(const CGPoint a,
const CGFloat b) {
return CGPointMake(a.x * b, a.y * b);
}
@interface MyScene() {
SKSpriteNode *_runner;
SKAction *_runningAnimation;
SKAction *_jumpAnimation;
SKAction *_crouchAnimation;
SKAction *_coinAnimation;
SKEmitterNode *_runnerEmitter;
SKLabelNode *_scoreLabel;
int _meter;
SKLabelNode *_highScoreLabel;
NSInteger _meter1;
SKLabelNode *_coinsLabel;
int _coins;
NSTimeInterval _lastUpdateTime;
// time diff
NSTimeInterval _dt;
CGFloat _groundHalfHeight;
enum RunnerState _runnerState;
SKNode *_bgLayer;
BOOL _isGameOver;
}
@end
@implementation MyScene
- (id)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {
/* Setup your scene here */
_bgLayer = [SKNode node];
[self addChild:_bgLayer];
[self initMap];
[self initScoreLabel];
[self initHighScoreLabel];
[self initCoinsLabel];
// adding background sound effect
[[SKTAudio sharedInstance] playBackgroundMusic:@"background.mp3"];
[self initRunnerAnimation];
[_runner runAction:[SKAction repeatActionForever:_runningAnimation] withKey:RUNNER_ANIMATION_KEY];
_runnerState = running;
[self initRunnerParticle];
[self initJumpAnimation];
[self initCrouchAnimation];
[self initCoinAnimation];
_meter1 = [[NSUserDefaults standardUserDefaults] integerForKey:@"HighScoreSaved"];
if (_meter > _meter1) {
[[NSUserDefaults standardUserDefaults] setInteger:_meter1 forKey:@"HighScoreSaved"];
}
// coins for fist map
// [self generateRandomCoins:_ground.size.width/4];
// coins for second map
// int x = _ground.position.x;
// [self generateRandomCoins:x];
// rocks for second map
// [self generateRandomRocks:x];
}
return self;
}
- (void)initRunnerParticle {
_runnerEmitter = [NSKeyedUnarchiver unarchiveObjectWithFile:
[[NSBundle mainBundle] pathForResource:@"RunnerParticle" ofType:@"sks"]];
_runnerEmitter.position = CGPointMake(_runner.size.width/2.0, _runner.size.height/2.0);
_runnerEmitter.name = RUNNER_EMITTER;
}
- (void)initCoinsLabel {
_coins = 0;
_coinsLabel = [SKLabelNode labelNodeWithFontNamed:@"Thonburi-Bold"];
_coinsLabel.text = @"Coins: 0";
_coinsLabel.fontSize = 20.0;
// _coinsLabel.verticalAlignmentMode = SKLabelHorizontalAlignmentModeLeft;// | SKLabelVerticalAlignmentModeBaseline;
_coinsLabel.position = CGPointMake(50, self.frame.size.height - _coinsLabel.frame.size.height * 1.5);
[self addChild:_coinsLabel];
}
- (void)initScoreLabel {
_meter = 0;
_scoreLabel = [SKLabelNode labelNodeWithFontNamed:@"Thonburi-Bold"];
_scoreLabel.text = @"0 Meter";
_scoreLabel.fontSize = 20.0;
// _scoreLabel.verticalAlignmentMode = SKLabelHorizontalAlignmentModeRight;// | SKLabelVerticalAlignmentModeBaseline;
_scoreLabel.position = CGPointMake(250, self.frame.size.height - _scoreLabel.frame.size.height * 1.5);
[self addChild:_scoreLabel];
}
- (void)initHighScoreLabel {
_meter1 = 0;
_highScoreLabel = [SKLabelNode labelNodeWithFontNamed:@"Thonburi-Bold"];
_highScoreLabel.text = @"0 High Score";
_highScoreLabel.fontSize = 20.0;
// _scoreLabel.verticalAlignmentMode = SKLabelHorizontalAlignmentModeRight;// | SKLabelVerticalAlignmentModeBaseline;
_highScoreLabel.position = CGPointMake(450, self.frame.size.height - _highScoreLabel.frame.size.height * 1.5);
[self addChild:_highScoreLabel];
}
- (void)initMap {
// adding the background
for (int i = 0; i < 2; ++i) {
SKSpriteNode *map = [SKSpriteNode spriteNodeWithImageNamed:[NSString stringWithFormat:@"Map0%d", i]];
map.anchorPoint = CGPointZero;
map.position = CGPointMake(i * map.size.width, 0);;
map.name = BG_NAME;
[_bgLayer addChild:map];
}
// adding the ground
SKSpriteNode *ground;
for (int i = 0; i < 2; ++i) {
ground = [SKSpriteNode spriteNodeWithImageNamed:[NSString stringWithFormat:@"Ground0%d", i]];
ground.anchorPoint = CGPointZero;
ground.position = CGPointMake(i * ground.size.width, 0);;
ground.name = GROUND_NAME;
_groundHalfHeight = ground.size.height/2.0;
[_bgLayer addChild:ground];
}
}
- (void)initRunnerAnimation {
// adding the runner
_runner = [SKSpriteNode spriteNodeWithImageNamed:@"runner0"];
_runner.anchorPoint = CGPointZero;
_runner.position = CGPointMake(RUNNER_X, self.frame.origin.y + _groundHalfHeight + RUNNER_HEIGHT/2.0);
[self addChild:_runner];
// adding running animation
NSMutableArray *textures = [NSMutableArray arrayWithCapacity:8];
for (int i = 0; i < 8; i++) {
NSString *textureName = [NSString stringWithFormat:@"runner%d", i];
SKTexture *texture = [SKTexture textureWithImageNamed:textureName];
[textures addObject:texture];
}
_runningAnimation = [SKAction animateWithTextures:textures timePerFrame:0.1];
}
- (void)initCrouchAnimation {
// adding crouch animation
_crouchAnimation = [SKAction animateWithTextures:@[[SKTexture textureWithImageNamed:@"runnerCrouch0"]] timePerFrame:1.4 resize:YES restore:YES];
}
- (void)initJumpAnimation {
// adding jump animation
NSMutableArray *jumpUpTextures = [NSMutableArray arrayWithCapacity:4];
for (int i = 0; i < 4; i++) {
NSString *textureName = [NSString stringWithFormat:@"runnerJumpUp%d", i];
SKTexture *texture = [SKTexture textureWithImageNamed:textureName];
[jumpUpTextures addObject:texture];
}
SKAction *jumpUpAnimation = [SKAction animateWithTextures:jumpUpTextures timePerFrame:0.2 resize:YES restore:YES];
SKAction *moveUpAction = [SKAction moveByX:0 y:JUMP_HEIGHT duration:0.8];
SKAction *jumpUpAction = [SKAction group:@[jumpUpAnimation, moveUpAction]];
NSMutableArray *jumpDownTextures = [NSMutableArray arrayWithCapacity:2];
for (int i = 0; i < 2; i++) {
NSString *textureName = [NSString stringWithFormat:@"runnerJumpDown%d", i];
SKTexture *texture = [SKTexture textureWithImageNamed:textureName];
[jumpDownTextures addObject:texture];
}
SKAction *jumpDownAnimation = [SKAction animateWithTextures:jumpDownTextures timePerFrame:0.3 resize:YES restore:YES];
SKAction *moveDownAction = [SKAction moveByX:0 y:-JUMP_HEIGHT duration:0.6];
SKAction *jumpDownAction = [SKAction group:@[jumpDownAnimation, moveDownAction]];
_jumpAnimation = [SKAction sequence:@[jumpUpAction, jumpDownAction]];
}
- (void)initCoinAnimation {
// adding coin animation
NSMutableArray *coinTextures = [NSMutableArray arrayWithCapacity:8];
for (int i = 0; i < 8; i++) {
NSString *textureName = [NSString stringWithFormat:@"coin%d", i];
SKTexture *texture = [SKTexture textureWithImageNamed:textureName];
[coinTextures addObject:texture];
}
_coinAnimation = [SKAction animateWithTextures:coinTextures timePerFrame:0.1];
}
- (void)moveBackground {
CGPoint bgVelocity;
if (_runnerState == incredible) {
bgVelocity = CGPointMake(-INCREDIBLE_BG_POINTS_PER_SEC, 0);
}
else {
bgVelocity = CGPointMake(-BG_POINTS_PER_SEC, 0);
}
CGPoint amtToMove = CGPointMultiplyScalar(bgVelocity, _dt);
// move the map
[_bgLayer enumerateChildNodesWithName:BG_NAME usingBlock:^(SKNode *node, BOOL *stop) {
SKSpriteNode *bg = (SKSpriteNode *) node;
bg.position = CGPointAdd(bg.position, amtToMove);
if (bg.position.x <= -bg.size.width) {
int x = (int) (bg.position.x + bg.size.width * 2);
bg.position = CGPointMake(x, bg.position.y);
// NSLog(@"%f %f", bg.position.x, bg.size.width);
// coins for new map
[self generateRandomCoins:x];
[self generateRandomRocks:x];
}
}];
// move the ground
[_bgLayer enumerateChildNodesWithName:GROUND_NAME usingBlock:^(SKNode *node, BOOL *stop) {
SKSpriteNode *ground = (SKSpriteNode *) node;
ground.position = CGPointAdd(ground.position, amtToMove);
if (ground.position.x <= -ground.size.width) {
int x = (int) (ground.position.x + ground.size.width * 2);
ground.position = CGPointMake(x, ground.position.y);
}
}];
[self moveObject:COIN_NAME to:amtToMove];
[self moveObject:ROCK_NAME to:amtToMove];
}
- (void)moveObject:(NSString *)name to:(CGPoint)amtToMove {
// move coins
[_bgLayer enumerateChildNodesWithName:name usingBlock:^(SKNode *node, BOOL *stop) {
SKSpriteNode *coin = (SKSpriteNode *) node;
coin.position = CGPointAdd(coin.position, amtToMove);
if (coin.position.x <= -coin.size.width) {
// off the screen, remove itself
[coin removeFromParent];
}
}];
}
- (void)didMoveToView:(SKView *)view {
UISwipeGestureRecognizer *swipeUpGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeUp:)];
swipeUpGestureRecognizer.direction = UISwipeGestureRecognizerDirectionUp;
[self.view addGestureRecognizer:swipeUpGestureRecognizer];
UISwipeGestureRecognizer *swipeDownGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeDown:)];
swipeDownGestureRecognizer.direction = UISwipeGestureRecognizerDirectionDown;
[self.view addGestureRecognizer:swipeDownGestureRecognizer];
UISwipeGestureRecognizer *swipeRightGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeRight:)];
swipeRightGestureRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swipeRightGestureRecognizer];
}
- (void)handleSwipeRight:(UISwipeGestureRecognizer *)recognizer {
NSLog(@"Swipe Right!");
[self startIncredibleMode];
}
- (void)startIncredibleMode {
if (_runnerState != running) {
return;
}
_runnerState = incredible;
// stop it after 5 sec
SKAction *wait = [SKAction waitForDuration:5.0];
[_runner runAction:wait completion:^{
_runnerState = running;
[_runner removeChildrenInArray:@[_runnerEmitter]];
}];
[_runner addChild:_runnerEmitter];
}
- (void)handleSwipeUp:(UISwipeGestureRecognizer *)recognizer {
NSLog(@"Swipe Up!");
[self jump];
}
- (void)jump {
if (_runnerState != running) {
return;
}
_runnerState = jumping;
[_runner removeActionForKey:RUNNER_ANIMATION_KEY];
[_runner runAction:_jumpAnimation completion:^{
[_runner removeAllActions];
[_runner runAction:[SKAction repeatActionForever:_runningAnimation] withKey:RUNNER_ANIMATION_KEY];
_runnerState = running;
}];
[self runAction:[SKAction playSoundFileNamed:@"jump.mp3" waitForCompletion:NO]];
}
- (void)handleSwipeDown:(UISwipeGestureRecognizer *)recognizer {
NSLog(@"Swipe Down!");
[self crouch];
}
- (void)crouch {
if (_runnerState != running) {
return;
}
_runnerState = crouching;
[_runner removeActionForKey:RUNNER_ANIMATION_KEY];
[_runner runAction:_crouchAnimation completion:^{
[_runner removeAllActions];
[_runner runAction:[SKAction repeatActionForever:_runningAnimation] withKey:RUNNER_ANIMATION_KEY];
_runnerState = running;
}];
[self runAction:[SKAction playSoundFileNamed:@"crouch.mp3" waitForCompletion:NO]];
}
- (void)generateRandomCoins:(int)x {
for (int i = 0; i < COINS_PER_MAP; ++i) {
x += (arc4random() % COIN_RANDOM_FACTOR);
SKSpriteNode *coin = [SKSpriteNode spriteNodeWithImageNamed:@"coin0"];
coin.position = CGPointMake(x, _groundHalfHeight + RUNNER_HEIGHT/2.0);
coin.anchorPoint = CGPointZero;
coin.name = COIN_NAME;
[coin runAction:[SKAction repeatActionForever:_coinAnimation]];
[_bgLayer addChild:coin];
}
}
- (void)generateRandomRocks:(int)x {
SKSpriteNode *rock = [SKSpriteNode spriteNodeWithImageNamed:@"rock"];
int x1 = x + (arc4random() % ROCK_RANDOM_FACTOR);
rock.position = CGPointMake(x1, _groundHalfHeight + RUNNER_HEIGHT/2.0);
rock.anchorPoint = CGPointZero;
rock.name = ROCK_NAME;
[_bgLayer addChild:rock];
int x2 = x + (arc4random() % ROCK_RANDOM_FACTOR);
SKSpriteNode *hathpace = [SKSpriteNode spriteNodeWithImageNamed:@"hathpace"];
hathpace.position = CGPointMake(x2, _groundHalfHeight + RUNNER_HEIGHT * 1.5);
hathpace.name = ROCK_NAME;
[_bgLayer addChild:hathpace];
}
- (void)checkCollisions {
// Check the coins
[_bgLayer enumerateChildNodesWithName:COIN_NAME
usingBlock:^(SKNode *node, BOOL *stop) {
SKSpriteNode *coin = (SKSpriteNode *) node;
if (CGRectIntersectsRect(coin.frame, _runner.frame)) {
[self runAction:[SKAction playSoundFileNamed:@"pickup_coin.mp3" waitForCompletion:NO]];
_coinsLabel.text = [NSString stringWithFormat:@"Coins: %d", ++_coins];
[coin removeFromParent];
}
}];
// Check the rocks
[_bgLayer enumerateChildNodesWithName:ROCK_NAME
usingBlock:^(SKNode *node, BOOL *stop) {
SKSpriteNode *rock = (SKSpriteNode *) node;
CGRect smallerFrame = CGRectInset(rock.frame, 20, 20);
if (CGRectIntersectsRect(_runner.frame, smallerFrame)) {
if (_runnerState == incredible) {
[rock removeFromParent];
}
else {
[self gameOver];
}
}
}];
}
- (void)gameOver {
NSLog(@"GameOver");
_isGameOver = YES;
[_runner removeActionForKey:RUNNER_ANIMATION_KEY];
EndScene *endScene = [[EndScene alloc] initWithSize:self.size showStartButton:YES];
SKTransition *reveal = [SKTransition flipHorizontalWithDuration:2.0];
[self.view presentScene:endScene transition:reveal];
_meter1 = [[NSUserDefaults standardUserDefaults] integerForKey:@"HighScoreSaved"];
if (_meter > _meter1) {
[[NSUserDefaults standardUserDefaults] setInteger:_meter forKey:@"HighScoreSaved"];
}
}
- (void)update:(NSTimeInterval)currentTime {
if (_isGameOver) {
return;
}
if (_lastUpdateTime) {
_dt = currentTime - _lastUpdateTime;
} else {
_dt = 0;
}
_lastUpdateTime = currentTime;
// Runner faster than normal
if (_runnerState == incredible) {
_meter += INCREDIBLE_BG_POINTS_PER_SEC/BG_POINTS_PER_SEC;
_meter1 += INCREDIBLE_BG_POINTS_PER_SEC/BG_POINTS_PER_SEC;
}
else {
++_meter;
++_meter1;
}
_scoreLabel.text = [NSString stringWithFormat:@"%d Meters", _meter];
_highScoreLabel.text = [NSString stringWithFormat:@"%li High Score",(long) _meter1];
[self checkCollisions];
[self moveBackground];
}
@end
學習如何使用調試器很早就解決了這個問題。設置一個斷點需要半秒鐘的時間來完成，然後你可以一步一步探索你期望發生的原因，而不是。正如當前答案所指出的，'_isGameOver'是一個可能的候選者，因爲如果該標誌被設置，它立即從更新方法返回。 – prototypical
@prototypical，謝謝你的迴應。今晚我會回家看看。 –