用於音頻播放器控件的iPhone滑動視圖控制器？

Question

我有一個短的音頻剪輯，按下按鈕時播放。我想從底部創建一個包含暫停/播放按鈕的滑塊控制器和一個顯示音頻長度的滑動條。我還希望控制器背後的視圖在控制器可見時保持可滾動狀態。我相信這不包括使用UIAlertView或UIActionSheetView，因爲它們都會導致下面的視圖保持靜態。什麼是實施這個最好的方法？

編輯：我發現了一個有用的教程在這裏：http://iosdevelopertips.com/user-interface/sliding-views-on-and-off-screen-creating-a-reusable-sliding-message-widget.html

，我能修改此來獲得我想要的東西。但是，如果我想使用一個nib文件進行動畫處理/我該如何調用它？

#import "SlidingMessageController.h" 


@interface SlidingMessageController(private) 
- (void)hideMsg; 
@end 

@implementation SlidingMessageController 
#pragma mark - 
#pragma mark Private Methods 


- (void)hideMsg; 
{ 
    // Slide the view off screen 
    CGRect frame = self.frame; 

    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:.75]; 

    frame.origin.y = 480; 
    frame.origin.x = 0; 
    self.frame = frame; 

    //to autorelease the Msg, define stop selector 
    [UIView setAnimationDelegate:self]; 
    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)]; 

    [UIView commitAnimations]; 
} 

- (void)animationDidStop:(NSString*)animationID finished:(BOOL)finished context:(void *)context 
{ 
    [self removeFromSuperview]; 
    [self release]; 
} 

#pragma mark - 
#pragma mark Initialization 

- (id)initWithDirection:(int)dir; 
//- (id)initWithTitle:(NSString *)title message:(NSString *)msg 
{ 
    if (self = [super init]) 
    { 
     //Switch direction based on slideDirection konstant 
     switch (dir) { 
      case kSlideUp: //slideup 
       // Notice the view y coordinate is offscreen (480) 
       // This hides the view 

       // What should I be doing here if I want to get the nib file???  
       self.frame = CGRectMake(0,480,320, 90); 
       [self setBackgroundColor:[UIColor blackColor]]; 
       [self setAlpha:.87]; 


       newY = 380; 
       newX = 0; 
       myDir = 0; 
       break; 
       default: 
       break; 
     } 


    } 

    return self; 
} 

#pragma mark - 
#pragma mark Message Handling 

- (void)showMsgWithDelay:(int)delay 
{ 
// UIView *view = self.view; 
    CGRect frame = self.frame; 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:.75]; 

    // Slide up based on y axis 
    // A better solution over a hard-coded value would be to 
    // determine the size of the title and msg labels and 
    // set this value accordingly 

    frame.origin.y = newY; 
    frame.origin.x = newX; 
    self.frame = frame; 

    [UIView commitAnimations]; 

    // Hide the view after the requested delay 
    [self performSelector:@selector(hideMsg) withObject:nil afterDelay:delay]; 

} 

#pragma mark - 
#pragma mark Cleanup 

- (void)dealloc 
{ 
    if ([self superview]) 
    [self removeFromSuperview]; 
    [super dealloc]; 
} 

@end 

Answer 1

「滑塊控制器」是什麼意思？只是從底部向上滑動的觀點？如果是這樣，你可以創建一個UIView的按鈕，併爲其設置動畫。對於動畫你可以使用UIView beginAnimations:context:和commitAnimations。