[英]iPhone, Cocos2D - moving sprite left/right while touching screen
我是Objective C和应用程序开发的新手,所以请放轻松! 我正在尝试制作基本游戏,并且需要在用户的手指在屏幕上的同时连续向左或向右移动精灵-左侧向左移动,右侧向右移动...我试图使用更新重复每1/60秒移动几像素。 到目前为止,这就是我所拥有的(并且对格式感到抱歉):
#import "GameplayLayer.h"
@implementation GameplayLayer
-(id)init {
self = [super init];
if (self != nil) {
CGSize screenSize = [CCDirector sharedDirector].winSize;
// enable touches
self.isTouchEnabled = YES;
blobSprite = [CCSprite spriteWithFile:@"blob.png"];
[blobSprite setPosition: CGPointMake(screenSize.width/2, screenSize.height*0.17f)];
ball = [CCSprite spriteWithFile:@"ball.png"];
[ball setPosition:CGPointMake(10, screenSize.height*0.75f)];
[self addChild:blobSprite];
[self addChild:ball];
[self schedule:@selector(update) interval:1.0f/60.0f];
}
return self;
}
-(void) update:(ccTime)dt{
if (_tapDownLeft == YES){
blobSprite.position.x==blobSprite.position.x-5;
}
if (_tapDownRight == YES){
blobSprite.position.x==blobSprite.position.x+5;
}
}
-(void) ccTouchesBegan:(UITouch*)touch withEvent: (UIEvent *)event{
CGPoint touchLocation = [touch locationInView:[touch view]];
touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
if (touchLocation.x > 400) {
if ((blobSprite.position.x+10)<460){
_tapDownRight = YES;
}
}
if (touchLocation.x < 200) {
if ((blobSprite.position.x-10>20)){
_tapDownLeft = YES;
}
}
else {
_tapDownLeft = NO;
_tapDownRight = NO;
}
}
-(void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event{
_tapDownLeft = NO;
_tapDownRight = NO;
}
-(void) registerWithTouchDispatcher{
[[CCTouchDispatcher sharedDispatcher]addTargetedDelegate:self priority:0 swallowsTouches:YES];
}
@end
我对此是否正确? 目前,它在更新中给了我“未使用的表达式结果”。 谁能告诉我我想念的东西吗? 任何帮助将不胜感激。
谢谢,帕特里克
我在这里看到一些东西:
删除更新函数中的参数
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