在OS X上的Cocoa的NSPageController教程 [英] NSPageController tutorial for Cocoa on OS X

问题描述

我需要在一些项目中使用 NSPageController ，但我不知道它是如何工作的，有没有时间为一些简单的教程显示我，因为文档不是

I need to use NSPageController in some project but I have no idea how it works, does anybody have time for some simple tutorial to show me because the documentation isn't helping me.

忘记提及：我正在处理 Mac项目 > iOS ）

Forgot to mention: I'm working on Mac project (NOT iOS)

推荐答案

Simple NSPageController book mode tutorial

创建新的 Cocoa Application 项目。在界面构建器中打开 MainMenu.xib ，并将 Image Well 和标签对象添加到应用程序窗口。还要添加页面控制器对象。

Simple NSPageController book mode tutorial

Create new Cocoa Application-project. Open MainMenu.xib in interface builder and add Image Well and Label objects to your application window. Also add Page Controller object.

设置页面控制器视图以指向 Image Well 。

示例项目：

• first.png


• second.png


• third.png

为页面控制器，标签和图像井添加引用出口。将 MyAppDelegate 设置为 NSPageControllerDelegate ，并为图像添加 NSArray 。之后，您的 MyAppDelegate.h 文件应如下所示：

Add referencing outlets for Page Controller, Label and Image Well. Set MyAppDelegate as NSPageControllerDelegate and add also NSArray for images. After this your MyAppDelegate.h file should look like this:

@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：

---

MyAppDelegate.m

Some initialization:

- (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;
}

---

h1>

---

And it's done

通过按 ctrl 将页面控制器连接到_pageController，然后使用鼠标拖动到< c> MyAppDelegate.h 档案。

Connect your Page Controller to _pageController by pressing ctrl and dragging with mouse to _pageController in MyAppDelegate.h file.

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