iPhone開發之UIImageView左右划動切換圖片

上下划動可以用類似的方法實現：

#import <UIKit/UIKit.h>@interface Abstruct : UIViewController <UIScrollViewDelegate>{    UIImageView* myimageview;    NSMutableArray *imgArray;    CGPoint FirstPoint;    CGPoint SecondPoint;    NSInteger Page;    BOOL touchMove;}@property (retain, nonatomic)  UIImageView* myimageview;@property (retain, nonatomic)  NSMutableArray *imgArray;@property NSInteger Page;@end

- (void)viewDidLoad{        [super viewDidLoad];imgArray = [[NSMutableArray alloc] initWithObjects:                [UIImage imageNamed:@"01-01-1.jpg"],                [UIImage imageNamed:@"01-01-2.jpg"],                [UIImage imageNamed:@"01-01-3.jpg"],                [UIImage imageNamed:@"01-01-4.jpg"],                [UIImage imageNamed:@"01-01-5.jpg"],                [UIImage imageNamed:@"01-01-6.jpg"],                [UIImage imageNamed:@"01-01-7.jpg"],nil]； self.navigationItem.title = [NSString stringWithFormat:@"1/%d",[imgArray count]];     self.myimageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 44,768, 1004)];    [self.myimageview setImage:[imgArray objectAtIndex:Page]];    [self.view addSubview:myimageview];}/*======================================================= //觸摸事件：點擊彈出導航條，左右划動切換經文 ========================================================*/- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    UITouch *touch = [[event allTouches] anyObject];    CGPoint point = [touch locationInView:self.view];    FirstPoint = point;    touchMove = NO;}- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {    UITouch *touch = [touches anyObject];    CGPoint point = [touch locationInView:self.view];    SecondPoint = point;    touchMove = YES;}- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{        if(touchMove == NO)    {    }else     {        if (FirstPoint.x > SecondPoint.x)        {            if(Page < [imgArray count] - 1)            {                Page++;                CGContextRef context = UIGraphicsGetCurrentContext();                [UIView beginAnimations:nil context:context];                [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];                [myimageview setAlpha:0.0];                [UIView setAnimationDuration:0.05];                [UIView commitAnimations];                [self performSelector:@selector(ChangeImage) withObject:nil afterDelay:0.1];            }else if (Page == [imgArray count] -1) {                CGContextRef context = UIGraphicsGetCurrentContext();                [UIView beginAnimations:nil context:context];                [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];                [myimageview setAlpha:0.0];                [UIView setAnimationDuration:0.05];                [UIView commitAnimations];                Page = 0;                [self performSelector:@selector(ChangeImage) withObject:nil afterDelay:0.1];            }        }else {            if(Page >= 1)            {                Page--;                CGContextRef context = UIGraphicsGetCurrentContext();                [UIView beginAnimations:nil context:context];                [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];                [myimageview setAlpha:0.0];                [UIView setAnimationDuration:0.05];                [UIView commitAnimations];                [self performSelector:@selector(ChangeImage) withObject:nil afterDelay:0.1];            }        }        }    }/*======================================================= 更新圖片顯示 ========================================================*/-(void)ChangeImage{    CGContextRef context = UIGraphicsGetCurrentContext();    [UIView beginAnimations:nil context:context];    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];    [UIView setAnimationDuration:0.5]; //動畫長度，單位為秒    [self.view setAlpha:1];    [myimageview setAlpha:1];    [myimageview setImage:[imgArray objectAtIndex:Page]];    //[myimageview setAnimationRepeatCount:4]; //設定重複次數    [UIView commitAnimations];    self.navigationItem.title = [NSString stringWithFormat:@"%d/%d",Page+1,[imgArray count]];}@end