海神

首先，需要在项目中添加OpenFlow开源框架([http://apparentlogic.com/openflow/]),并添加需要显示的图片。

再添加一个RootViewController作为默认页面,该类的头文件定义如下:

#import <UIKit/UIKit.h>
#import "AFOpenFlowView.h"

// 实现了AFOpenFlowViewDataSource和AFOpenFlowViewDelegate委托.
@interface ImageBrowserController : UIViewController<AFOpenFlowViewDataSource, AFOpenFlowViewDelegate> {
// 用来存储图片对象.
NSArray *coverImageData;
}
// 设置默认显示的图片.
- (void) imageDidLoad:(NSArray *)arguments;
@end

在RootViewController.m中，首先重载viewDidLoad方法，用于加载图并生成CoverFlow视图。

- (void)viewDidLoad{
// Use sample images, but load them all at once.
// Load Images.
coverImageData = [NSArray arrayWithObjects:[UIImage imageNamed:@"2569531.jpg"],
[UIImage imageNamed:@"2569547.jpg"],
[UIImage imageNamed:@"2569554.jpg"],
[UIImage imageNamed:@"V1440x900.jpg"],
[UIImage imageNamed:@"2569555.jpg"],
[UIImage imageNamed:@"2569562.jpg"],
[UIImage imageNamed:@"2569565.jpg"],
nil];

// Set the Images in OpenFlow View and set the count of images.
for (int i=0; i < [array count]; i++) {
UIImage *orgImage = [array objectAtIndex:i] forIndex:i];
UIImage *scaleImage = [orgImage cropCenterAndScaleImageToSize:CGSizeMake(440, 556)];
[(AFOpenFlowView *)self.view setImage: scaleImage];
}
[(AFOpenFlowView *)self.view setNumberOfImages:[array count]];
}

cropCenterAndScaleImageToSize:方法在UIImageExtras.h文件中定义，用来调整图片的大小

现在我们需要设置程序启动时默认显示的图片:

- (void) imageDidLoad:(NSArray *)arguments{
UIImage *loadedImage = (UIImage *) [arguments objectAtIndex:0];
NSNumber *imageIndex = (NSNumber *) [arguments objectAtIndex:1];
[(AFOpenFlowView *)self.view setImage:loadedImage forIndex:[imageIndex intValue]];
}

切换图片后调用方法：

- (void)openFlowView:(AFOpenFlowView *)openFlowView selectionDidChange:(int)index

AFOpenFlowConstants.h中定义了一些常量，用来调整图片显示的位置和角度。