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我需要NSPageController在某个项目中使用,但我不知道它是如何工作的,有没有人有时间给我看一些简单的教程,因为文档对我没有帮助。

忘了提:我正在研究Mac projectNOT iOS

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1 回答 1

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简单的 NSPageController 书本模式教程

创建新的Cocoa 应用程序- 项目。在界面生成器中打开MainMenu.xib并将Image WellLabel对象添加到您的应用程序窗口。同时添加页面控制器对象。

页面控制器的视图设置为指向Image Well


添加一些图片到Images.xcassets

我在这个示例项目中使用了三个图像:

  • 第一个.png
  • 第二个.png
  • 第三个.png

MyAppDelegate.h

为Page ControllerLabelImage Well添加引用插座。设置MyAppDelegateNSPageControllerDelegate并添加NSArray图像。在此之后,您的MyAppDelegate.h文件应如下所示:

@interface MyAppDelegate : NSObject <NSApplicationDelegate, NSPageControllerDelegate>

@property (assign) IBOutlet NSWindow *window;
@property (unsafe_unretained) IBOutlet NSPageController *pageController;
@property (weak) IBOutlet NSImageView *imageView;
@property (weak) IBOutlet NSTextField *infoLabel;

@property (nonatomic) NSArray *imageArray;

@end

MyAppDelegate.m

一些初始化:

- (void)awakeFromNib {
    _imageArray = @[ [NSImage imageNamed:@"first"],
                     [NSImage imageNamed:@"second"],
                     [NSImage imageNamed:@"third"]];
    
    /* Set delegate for NSPageControl */
    [_pageController setDelegate:self];
    /* Set arranged objects for NSPageControl */
    [_pageController setArrangedObjects:_imageArray];
    /* Set transition style, in this example we use book style */
    [_pageController setTransitionStyle:NSPageControllerTransitionStyleStackBook];
    
    /* Set info label's text */
    NSString *info = [NSString stringWithFormat:@"Image %ld/%ld", ([_pageController selectedIndex]+1), [_imageArray count]];
    [_infoLabel setStringValue:info];
}

页面控制器委托方法:

- (void)pageController:(NSPageController *)pageController didTransitionToObject:(id)object {
    /* When image is changed, update info label's text */
    NSString *info = [NSString stringWithFormat:@"Image %ld/%ld", ([_pageController selectedIndex]+1), [_imageArray count]];
    [_infoLabel setStringValue:info];
}

- (NSString *)pageController:(NSPageController *)pageController identifierForObject:(id)object {
    /* Returns object's array index as identiefier */
    NSString *identifier = [[NSNumber numberWithInteger:[_imageArray indexOfObject:object]] stringValue];
    return identifier;
}

- (NSViewController *)pageController:(NSPageController *)pageController viewControllerForIdentifier:(NSString *)identifier {
    /* Create new view controller and image view */
    NSViewController *vController = [NSViewController new];
    NSImageView *iView = [[NSImageView alloc] initWithFrame:[_imageView frame]];
    
    /* Get image from image array using identiefier and set image to view */
    [iView setImage:(NSImage *)[_imageArray objectAtIndex:[identifier integerValue]]];
    /* Set image view's frame style to none */
    [iView setImageFrameStyle:NSImageFrameNone];
    
    /* Add image view to view controller and return view controller */
    [vController setView:iView];
    return vController;
}

它已经完成了


如果您的 _pageController 为 null/nil

ctrl通过用鼠标按下并拖动到文件中的 _pageController 将您的页面控制器连接到_pageController MyAppDelegate.h

于 2013-11-15T17:46:40.777 回答