在另一個按鈕選擇上更改UIButton圖像

Question

我在我的UIView中有一個視頻，一個播放和一個停止按鈕下的2個按鈕。當單擊播放按鈕時，它變成暫停按鈕並反向調用。這裏是實現代碼：

-(UIView *)subViewControlsView{ 
    UIView *subViewWithControls = [[[UIView alloc]init]autorelease]; 
    subViewWithControls = [[UIView alloc]initWithFrame:CGRectMake((self.view.frame.size.width - xPoint_Pad) - 147, 630, 147, 44)]; 
    [subViewWithControls setBackgroundColor:[UIColor clearColor]]; 

    playButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
    [playButton setFrame:CGRectMake(0, 0, 44, 44)]; 
    [playButton setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal]; 
    [playButton setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateSelected]; 
    [playButton addTarget:self action:@selector(play:) forControlEvents:UIControlEventTouchUpInside]; 
    [subViewWithControls addSubview:playButton]; 


    stopButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
    [stopButton setFrame:CGRectMake(94, 0, 44, 44)]; 
    [stopButton setImage:[UIImage imageNamed:@"stop.png"] forState:UIControlStateNormal]; 
    [stopButton addTarget:self action:@selector(stop:) forControlEvents:UIControlEventTouchUpInside]; 
    [subViewWithControls addSubview:stopButton]; 

    return subViewWithControls; 
} 

，這裏是播放鍵操作：

-(void)play:(UIButton *)sender 
{ 
    if(sender.selected == NO){ 
     sender.selected = YES; 
     [self setButtonCurrentState:YES]; 
     [self.moviePlayerController setInitialPlaybackTime:self.currentTime]; 
     [self playMovieFile:[self localMovieURL]]; 
    } 
    else{ 
     sender.selected = NO; 
     [self setButtonCurrentState:NO]; 
     self.currentTime = self.moviePlayerController.currentPlaybackTime; 
     [self.moviePlayerController pause]; 
    } 
} 

我的要求是，我需要改變播放圖像暫停播放按鈕，當影片播放即停止，當用戶點擊停止按鈕。我嘗試了以下方法：

-(void)stop:(UIButton *)sender{ 
    if (self.buttonCurrentState == YES) 
    { 
     [playButton setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal]; 
    } 
    self.currentTime = 0.0; 
    [[self moviePlayerController] stop]; 
    [self deletePlayerAndNotificationObservers]; 
} 

它正在驗證停止按鈕動作中的條件，我已經調試和測試過了，但圖像變化沒有影響。想知道爲什麼？

我也嘗試改變播放按鈕操作中的圖像，而不是在-(UIView *)subViewControlsView method.But發生什麼是令我驚訝的是，我看不到該按鈕，因爲該圖像未在視圖方法中設置。我有試圖設置圖像作爲最初控制狀態正常播放，然後改變播放action.Now發生了什麼是播放按鈕不轉到暫停按鈕，這是一個雙重打擊。我試着設置標籤，布爾值和很多more.None他們似乎工作！

任何人都可以請給我一個解決方案嗎？

感謝所有提前:)

Answer 1

就在那時，我已經找到了解決方案，我problem.Thanks到Mr.San和Mr.Preetam對他們的關心和幫助我在擺脫issue.We的需要通過更改按鈕圖像設置標籤，然後禁用爲playButton即所選擇的狀態，

//Set the tag for button 
playButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
playButton.tag = 104; 

然後訪問按鈕，其狀態恢復到正常

-(void)stop:(UIButton *)sender 
{ 
    UIButton * play=(UIButton*)[self.view viewWithTag:104]; 
    [play setSelected:NO]; 
    ........ 
} 

感謝，並希望它可以幫助一些一，快樂編碼:)

Answer 2

[playButton setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal]; 

將設置圖像實例陳述UIControlStateNormal，但播放電影時，該按鈕狀態沒有UIControlStateSelected（即pause.png將顯示）。

所以解決的辦法是，你需要設置狀態。

-(void)stop:(UIButton *)sender{ 
    if (playButton.isSelected) 
    { 
     [playButton setSelected:NO]; 
    } 
    self.currentTime = 0.0; 
    [[self moviePlayerController] stop]; 
    [self deletePlayerAndNotificationObservers]; 
}