Question

与旧版的Simon游戏类似，我想向用户显示一个按钮序列＆amp;然后让他们重复一遍。我被困住的地方显示第一个按钮突出显示为500毫秒，等待100毫秒，显示第二个突出显示500毫秒，等待另一个100毫秒，显示第三个＆amp;等等。

从其他Stackoverflower'ers我已经到了这个街区：

redButton.highlighted = YES;

[UIView beginAnimations:@"" context:nil];
[UIView setAnimationStartDate:[NSDate dateWithTimeIntervalSinceNow:1]];
[UIView setAnimationsEnabled:NO];
redButton.highlighted = NO;
[UIView commitAnimations];

[UIView beginAnimations:@"" context:nil];
[UIView setAnimationStartDate: [NSDate dateWithTimeIntervalSinceNow:2]];
[UIView setAnimationsEnabled:NO];
blueButton.highlighted = YES;
[UIView commitAnimations];

redButton会突出显示，但后续动作都不会发生。

Answer 1

使用Core Animation可能有办法做到这一点，但没有必要。您没有为突出显示的属性设置动画，只是打开和关闭它。

我创建了一个基于视图的简单iPhone应用程序来与计时器一起执行此操作。以下是视图控制器中的代码：

<强> SimonTestViewController.h ：

#import <UIKit/UIKit.h>

@interface SimonTestViewController : UIViewController {
 IBOutlet UIButton *redButton;
 IBOutlet UIButton *blueButton;
 IBOutlet UIButton *greenButton;
 IBOutlet UIButton *yellowButton;
}

- (void)highlightButton:(UIButton*)button Delay:(double)delay;
- (void)highlightOn:(NSTimer*)timer;
- (void)highlightOff:(NSTimer*)timer;

@end

<强> SimonTestViewController.m ：

#import "SimonTestViewController.h"

@implementation SimonTestViewController

const double HIGHLIGHT_SECONDS = 0.5; // 500 ms
const double NEXT_SECONDS = 0.6; // 600 ms

- (void)viewDidAppear:(BOOL)animated {
 [super viewDidAppear:animated];

 [self highlightButton:redButton Delay:0.0];
 [self highlightButton:blueButton Delay:NEXT_SECONDS];
 [self highlightButton:greenButton Delay:NEXT_SECONDS * 2];
 [self highlightButton:blueButton Delay:NEXT_SECONDS * 3];
 [self highlightButton:yellowButton Delay:NEXT_SECONDS * 4];
 [self highlightButton:redButton Delay:NEXT_SECONDS * 5];
}

- (void)highlightButton:(UIButton*)button Delay:(double)delay {
 [NSTimer scheduledTimerWithTimeInterval:delay target:self selector:@selector(highlightOn:) userInfo:button repeats:NO];
}

- (void)highlightOn:(NSTimer*)timer {
 UIButton *button = (UIButton*)[timer userInfo];

 button.highlighted = YES;

 [NSTimer scheduledTimerWithTimeInterval:HIGHLIGHT_SECONDS target:self selector:@selector(highlightOff:) userInfo:button repeats:NO];
}

- (void)highlightOff:(NSTimer*)timer {
 UIButton *button = (UIButton*)[timer userInfo];

 button.highlighted = NO;
}

如何显示一系列突出显示的按钮？

1 个答案: