[英]performSelector with time delay does not work in for loop - iPhone
我希望有人可以帮助我。 我正在编写一个简单的游戏,当用户按下一个按钮时,将生成一个与按钮编号相对应的数字数组,然后使用for循环按时间顺序依次打开和关闭每个按钮。 问题是阵列中的所有按钮都打开,而只有最后一个按钮关闭。 就像perfomSelector with time delay命令仅在for循环的末尾执行一样,有人知道为什么吗?
这是我正在使用的代码:
- (IBAction)buttonPushed:(id)sender;
{
//creat random array of buttons
[self randomArray];
//loop through each button in array and turn them on and off
for (NSString *i in gameArray)
{
int butNum = [i intValue];
numLit = [[NSNumber alloc] initWithInt:butNum];
//turn button on
[self buttonLit];
//turn button off
[self performSelector:@selector(buttonUnLit) withObject:nil afterDelay:1.0];
}
}
- (void)randomArray
{
//initialize array
gameArray = [[NSMutableArray alloc] initWithArray:NULL];
//************* Build random array of numbers *******************
for (int i = 0; i < level; i++)
{
//generate a number from 0 to 11 at random
NSInteger num = (arc4random() % 11);
//add number to array
[gameArray addObject:[NSString stringWithFormat:@"%i", num]];
}
return;
}
- (void)buttonLit
{
int numLitInt = [numLit intValue];
if (numLitInt == 0)
{
[button0 setImage:[UIImage imageNamed:@"0(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 1)
{
[button1 setImage:[UIImage imageNamed:@"1(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 2)
{
[button2 setImage:[UIImage imageNamed:@"2(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 3)
{
[button3 setImage:[UIImage imageNamed:@"3(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 4)
{
[button4 setImage:[UIImage imageNamed:@"4(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 5)
{
[button5 setImage:[UIImage imageNamed:@"5(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 6)
{
[button6 setImage:[UIImage imageNamed:@"6(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 7)
{
[button7 setImage:[UIImage imageNamed:@"7(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 8)
{
[button8 setImage:[UIImage imageNamed:@"8(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 9)
{
[button9 setImage:[UIImage imageNamed:@"9(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 10)
{
[button10 setImage:[UIImage imageNamed:@"10(lite).png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 11)
{
[button11 setImage:[UIImage imageNamed:@"11(lite).png"] forState:UIControlStateNormal];
return;
}
}
- (void)buttonUnLit
{
int numLitInt = [numLit intValue];
if (numLitInt == 0)
{
[button0 setImage:[UIImage imageNamed:@"0.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 1)
{
[button1 setImage:[UIImage imageNamed:@"1.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 2)
{
[button2 setImage:[UIImage imageNamed:@"2.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 3)
{
[button3 setImage:[UIImage imageNamed:@"3.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 4)
{
[button4 setImage:[UIImage imageNamed:@"4.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 5)
{
[button5 setImage:[UIImage imageNamed:@"5.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 6)
{
[button6 setImage:[UIImage imageNamed:@"6.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 7)
{
[button7 setImage:[UIImage imageNamed:@"7.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 8)
{
[button8 setImage:[UIImage imageNamed:@"8.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 9)
{
[button9 setImage:[UIImage imageNamed:@"9.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 10)
{
[button10 setImage:[UIImage imageNamed:@"10.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 11)
{
[button11 setImage:[UIImage imageNamed:@"11.png"] forState:UIControlStateNormal];
return;
}
}
您的问题很明显,您正在for循环中更改numLit,希望选择器在一秒钟内执行,到第一个选择器触发时,您已经将numLit更改为最后一个数字,这就是为什么所有触发的原因修改最后一个按钮...您应该通过将数字传递给buttonUnlit来解决此问题,这样您就不必依赖于您不断更改的类变量了……
- (void)buttonUnLit:(NSNumber*)number
{
int numLitInt = [number intValue];
if (numLitInt == 0)
{
[button0 setImage:[UIImage imageNamed:@"0.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 1)
{
[button1 setImage:[UIImage imageNamed:@"1.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 2)
{
[button2 setImage:[UIImage imageNamed:@"2.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 3)
{
[button3 setImage:[UIImage imageNamed:@"3.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 4)
{
[button4 setImage:[UIImage imageNamed:@"4.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 5)
{
[button5 setImage:[UIImage imageNamed:@"5.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 6)
{
[button6 setImage:[UIImage imageNamed:@"6.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 7)
{
[button7 setImage:[UIImage imageNamed:@"7.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 8)
{
[button8 setImage:[UIImage imageNamed:@"8.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 9)
{
[button9 setImage:[UIImage imageNamed:@"9.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 10)
{
[button10 setImage:[UIImage imageNamed:@"10.png"] forState:UIControlStateNormal];
return;
}else if (numLitInt == 11)
{
[button11 setImage:[UIImage imageNamed:@"11.png"] forState:UIControlStateNormal];
return;
}
}
和
- (IBAction)buttonPushed:(id)sender;
{
//creat random array of buttons
[self randomArray];
float dalay=1.0f;
//loop through each button in array and turn them on and off
for (NSString *i in gameArray)
{
int butNum = [i intValue];
NSNumber *num = [[NSNumber alloc] initWithInt:butNum];
//turn button on
[self buttonLit];
//turn button off
[self performSelector:@selector(buttonUnLit) withObject:num afterDelay:delay];
delay+=0.5f;
[num release];
}
}
Daniel的解决方案应该可以解决您的问题。
您是否考虑过将按钮归类? 然后对子类进行编码,以了解如何点亮和熄灭自身。
该子类几乎不需要逻辑,并且可以减少问题中发布的代码。
属性
•litFileName
•unlitFileName
方法
• -(void)light
• -(void)unlight
丹尼尔-再次感谢您的帮助,这是为我工作的解决方案。
- (IBAction)buttonPushed:(id)sender;
{
//creat random array of buttons
[self randomArray];
//loop through each button in array and turn them on and off
for (NSString *i in gameArray)
{
int butNum = [i intValue];
NSNumber *number = [[NSNumber alloc] initWithInt:butNum];
//turn button on
[self buttonLit:(NSNumber*)number];
//turn button off
[self performSelector:@selector(buttonUnLit:) withObject:number afterDelay:1.0];
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow: 1.0]];
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.