Iphone 如何更改按钮的背景图像并使其立即更新？_Iphone_Objective C_Image_Background_Uibutton

Iphone 如何更改按钮的背景图像并使其立即更新？

iphone objective-c image

Iphone 如何更改按钮的背景图像并使其立即更新？,iphone,objective-c,image,background,uibutton,Iphone,Objective C,Image,Background,Uibutton,我正在开发一个记忆游戏。当我点击一个按钮时，我想切换背景。当我第二次点击卡片时，我希望背景切换一秒钟，然后回到原来的位置（如果不是正确的卡片）。但是按钮的背景直到我从方法返回（buttonPressed）后才会改变。为什么不立即改变呢？请帮帮我！：）这是我正在与之合作的班级： #import "Button.h" #import <UIKit/UIKit.h> #import <AVFoundation/AVAudioPlayer.h> @class ZogajApp

我正在开发一个记忆游戏。当我点击一个按钮时，我想切换背景。当我第二次点击卡片时，我希望背景切换一秒钟，然后回到原来的位置（如果不是正确的卡片）。但是按钮的背景直到我从方法返回（buttonPressed）后才会改变。为什么不立即改变呢？请帮帮我！：）

这是我正在与之合作的班级：

#import "Button.h"
#import <UIKit/UIKit.h>
#import <AVFoundation/AVAudioPlayer.h>

@class ZogajAppDelegate;

@interface PairPlayPlayViewController : UIViewController <AVAudioPlayerDelegate> {
    ZogajAppDelegate *appDelegate;
    AVAudioPlayer *av;
    Boolean isPairActive;
    Button *firstButton;
    Button *secondButton;

}
@property (nonatomic, retain) AVAudioPlayer *av;
@property (nonatomic, retain) Button *firstButton;
@property (nonatomic, retain) Button *secondButton;
- (void)buttonPressed:(id)sender;
- (void)secondCard;

@end

#import "PairPlayPlayViewController.h"
#import "ZogajAppDelegate.h"
#import "Button.h"
#import "AVFoundation/AVAudioPlayer.h"



@implementation PairPlayPlayViewController
@synthesize av, firstButton, secondButton;

/*
 // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];

    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"double_card" ofType:@"mp3"];
    NSString *newAudioFile2 = [[NSBundle mainBundle] pathForResource:@"right_sound" ofType:@"mp3"];

    av = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    [av prepareToPlay];
    [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile2] error:NULL];
    [av prepareToPlay];
    //av = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    //[av prepareToPlay];
    isPairActive = FALSE;


    appDelegate = (ZogajAppDelegate *)[[UIApplication sharedApplication] delegate];
    int position;

    for(int i = 0; i < ((appDelegate.numberOfPairs*2)/5); i++){

        for (int j = 0; j<5 ;j++){


            Button *button = [[Button alloc] init];

            //Sätter bild nummer..
            position = (arc4random() % [appDelegate.cardsInPlay count]);
            button.picNumber = [[appDelegate.cardsInPlay objectAtIndex:position]intValue];
                        NSLog(@"%d", button.picNumber);
            [appDelegate.cardsInPlay removeObjectAtIndex:position];

            button.frame = CGRectMake( 3 + (65 * j), 5 + (65 * i), 55, 55);
            button.imageView.contentMode = UIViewContentModeScaleAspectFit;
            button.imageView.clipsToBounds = YES;
            [button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
            [button addTarget:self action:@selector(buttonPressed:)
             forControlEvents:UIControlEventTouchUpInside];
            [self.view addSubview:button];
        }
    }
    for (int j = 0; j<((appDelegate.numberOfPairs*2) % 5) ;j++){


        Button *button = [[Button alloc] init];

        //Sätter bild nummer..
        position = (arc4random() % [appDelegate.cardsInPlay count]);
        button.picNumber = [[appDelegate.cardsInPlay objectAtIndex:position]intValue];
        NSLog(@"%d", button.picNumber);
        [appDelegate.cardsInPlay removeObjectAtIndex:position];

        button.frame = CGRectMake( 3 + (65 * j), 5 + (65 * ((appDelegate.numberOfPairs*2)/5) + 1), 55, 55);
        //button.imageView.contentMode = UIViewContentModeScaleAspectFit;
        //button.imageView.clipsToBounds = YES;
        [button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(buttonPressed:)
         forControlEvents:UIControlEventAllTouchEvents];

        [self.view addSubview:button];
    }
}


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

-(void)buttonPressed:(id)sender {
    Button *button = [[Button alloc] init];
    button = sender;
    NSLog(@"%d och spela upp ljud", button.picNumber);
    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"double_card" ofType:@"mp3"];
    [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    [av play];
    [button setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d.png",button.picNumber]] forState:UIControlStateNormal];
    [self.view addSubview:button];
    [NSThread sleepForTimeInterval:1.0];

    if(isPairActive == FALSE){
        isPairActive = TRUE;
        firstButton = button;
    }
    else {
        secondButton = button;
        [self secondCard];
    }

    return;
}

- (void)secondCard {
    [NSThread sleepForTimeInterval:1.0];
    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"double_card" ofType:@"mp3"];
    isPairActive = FALSE;
    if([appDelegate.dictionary objectForKey:[NSString stringWithFormat:@"%d",secondButton.picNumber]] == [NSString stringWithFormat:@"%d",firstButton.picNumber]){
        NSString *newAudioFile2 = [[NSBundle mainBundle] pathForResource:@"right_sound" ofType:@"mp3"];
        [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile2] error:NULL];
        [av play];
    }
    else {
        [firstButton setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
        [secondButton setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
        [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
        [av play];
    }
    return;
}

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [super dealloc];
    [av release];
    [firstButton release];
    [secondButton release];
}


@end

#导入“Button.h”
#进口
#进口
@ZogajAppDelegate类；
@接口对播放播放视图控制器：UIViewController{
ZogajAppDelegate*appDelegate；
AVAudioPlayer*av；
布尔isPairActive；
按钮*第一个按钮；
按钮*第二个按钮；
}
@属性（非原子，保留）AVAudioPlayer*av；
@属性（非原子，保留）按钮*firstButton；
@属性（非原子，保留）按钮*secondButton；
-（无效）按钮按下：（id）发送者；
-（作废）第二张信用卡；
@结束

和.m文件：

#import "Button.h"
#import <UIKit/UIKit.h>
#import <AVFoundation/AVAudioPlayer.h>

@class ZogajAppDelegate;

@interface PairPlayPlayViewController : UIViewController <AVAudioPlayerDelegate> {
    ZogajAppDelegate *appDelegate;
    AVAudioPlayer *av;
    Boolean isPairActive;
    Button *firstButton;
    Button *secondButton;

}
@property (nonatomic, retain) AVAudioPlayer *av;
@property (nonatomic, retain) Button *firstButton;
@property (nonatomic, retain) Button *secondButton;
- (void)buttonPressed:(id)sender;
- (void)secondCard;

@end

#import "PairPlayPlayViewController.h"
#import "ZogajAppDelegate.h"
#import "Button.h"
#import "AVFoundation/AVAudioPlayer.h"



@implementation PairPlayPlayViewController
@synthesize av, firstButton, secondButton;

/*
 // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];

    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"double_card" ofType:@"mp3"];
    NSString *newAudioFile2 = [[NSBundle mainBundle] pathForResource:@"right_sound" ofType:@"mp3"];

    av = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    [av prepareToPlay];
    [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile2] error:NULL];
    [av prepareToPlay];
    //av = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    //[av prepareToPlay];
    isPairActive = FALSE;


    appDelegate = (ZogajAppDelegate *)[[UIApplication sharedApplication] delegate];
    int position;

    for(int i = 0; i < ((appDelegate.numberOfPairs*2)/5); i++){

        for (int j = 0; j<5 ;j++){


            Button *button = [[Button alloc] init];

            //Sätter bild nummer..
            position = (arc4random() % [appDelegate.cardsInPlay count]);
            button.picNumber = [[appDelegate.cardsInPlay objectAtIndex:position]intValue];
                        NSLog(@"%d", button.picNumber);
            [appDelegate.cardsInPlay removeObjectAtIndex:position];

            button.frame = CGRectMake( 3 + (65 * j), 5 + (65 * i), 55, 55);
            button.imageView.contentMode = UIViewContentModeScaleAspectFit;
            button.imageView.clipsToBounds = YES;
            [button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
            [button addTarget:self action:@selector(buttonPressed:)
             forControlEvents:UIControlEventTouchUpInside];
            [self.view addSubview:button];
        }
    }
    for (int j = 0; j<((appDelegate.numberOfPairs*2) % 5) ;j++){


        Button *button = [[Button alloc] init];

        //Sätter bild nummer..
        position = (arc4random() % [appDelegate.cardsInPlay count]);
        button.picNumber = [[appDelegate.cardsInPlay objectAtIndex:position]intValue];
        NSLog(@"%d", button.picNumber);
        [appDelegate.cardsInPlay removeObjectAtIndex:position];

        button.frame = CGRectMake( 3 + (65 * j), 5 + (65 * ((appDelegate.numberOfPairs*2)/5) + 1), 55, 55);
        //button.imageView.contentMode = UIViewContentModeScaleAspectFit;
        //button.imageView.clipsToBounds = YES;
        [button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(buttonPressed:)
         forControlEvents:UIControlEventAllTouchEvents];

        [self.view addSubview:button];
    }
}


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

-(void)buttonPressed:(id)sender {
    Button *button = [[Button alloc] init];
    button = sender;
    NSLog(@"%d och spela upp ljud", button.picNumber);
    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"double_card" ofType:@"mp3"];
    [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
    [av play];
    [button setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d.png",button.picNumber]] forState:UIControlStateNormal];
    [self.view addSubview:button];
    [NSThread sleepForTimeInterval:1.0];

    if(isPairActive == FALSE){
        isPairActive = TRUE;
        firstButton = button;
    }
    else {
        secondButton = button;
        [self secondCard];
    }

    return;
}

- (void)secondCard {
    [NSThread sleepForTimeInterval:1.0];
    NSString *newAudioFile = [[NSBundle mainBundle] pathForResource:@"double_card" ofType:@"mp3"];
    isPairActive = FALSE;
    if([appDelegate.dictionary objectForKey:[NSString stringWithFormat:@"%d",secondButton.picNumber]] == [NSString stringWithFormat:@"%d",firstButton.picNumber]){
        NSString *newAudioFile2 = [[NSBundle mainBundle] pathForResource:@"right_sound" ofType:@"mp3"];
        [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile2] error:NULL];
        [av play];
    }
    else {
        [firstButton setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
        [secondButton setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
        [av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile] error:NULL];
        [av play];
    }
    return;
}

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [super dealloc];
    [av release];
    [firstButton release];
    [secondButton release];
}


@end

#导入“PairPlayViewController.h”
#导入“ZogajAppDelegate.h”
#导入“Button.h”
#导入“AVFoundation/AVAudioPlayer.h”
@PairPlayViewController的实现
@合成av，第一个按钮，第二个按钮；
/*
//指定的初始值设定项。如果以编程方式创建控制器并希望执行不适用于viewDidLoad的自定义，请重写。
-（id）initWithNibName:（NSString*）nibNameOrNil bundle:（NSBundle*）nibBundleOrNil{
if（（self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]））{
//自定义初始化
}
回归自我；
}
*/
//实现viewDidLoad以在加载视图（通常从nib）后执行附加设置。
-（无效）viewDidLoad{
[超级视图下载]；
NSString*newAudioFile=[[NSBundle mainBundle]路径资源：@“mp3”类型的“双U卡”；
NSString*newAudioFile2=[[NSBundle mainBundle]路径资源：@“mp3”类型的“右音”；
av=[[AvaudioLayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile]错误：NULL]；
[视听游戏]；
[av initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile2]错误：NULL]；
[视听游戏]；
//av=[[AvaudioLayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:newAudioFile]错误：NULL]；
//[视听游戏]；
isPairActive=FALSE；
appDelegate=（ZogajAppDelegate*）[[UIApplication sharedApplication]委托]；
内部位置；
对于（int i=0；i<（（appDelegate.numberOfPairs*2）/5）；i++）{
对于（int j=0；j在按钮中按下：
更改背景，设置一个NSTimer回叫您，然后返回。在NSTimer回叫中，将背景设置回您想要的
绘图不会在您要求的时候发生。这会给您带来糟糕的性能。所有绘图都会合并到运行循环的绘图部分。只有从该iAction方法返回，您才能到达该部分。
在按钮中按下：
更改背景，设置一个NSTimer来回叫您，然后返回。在NSTi中mer callback，将背景设置回您想要的
绘图不会在您要求的时候发生。这会给您带来糟糕的性能。所有绘图都会合并到运行循环的绘图部分。只有从该iAction方法返回后，您才能到达该部分。
正如您所知，从该方法返回后，图像将被更改。就是这样
您必须从该方法返回，因此您必须更改图像，执行选择器以执行您要执行的其余代码，并从该方法返回
UIKit只能在主线程上运行，因此您必须从方法返回，这将阻止它，然后它将执行GUI操作
编辑：
不要让NSThread休眠，而是延迟执行选择器。
正如您已经知道的，从方法返回后，图像将被更改。就是这样
您必须从该方法返回，因此您必须更改图像，执行选择器以执行您要执行的其余代码，并从该方法返回
UIKit只能在主线程上运行，因此您必须从方法返回，这将阻止它，然后它将执行GUI操作
编辑：
不要让NSThread休眠，而是延迟执行选择器。
我认为应该使用NSTimer而不是混用NSThread。我认为应该使用NSTimer而不是混用NSThread。