objective-c - 如何从其他 View Controller 访问属性

Question

我正在使用 Xcode 4.6.1 为 iOS 6 进行开发。

我有两个 View Controller :viewController1和 viewController2 .我正在尝试访问 viewController1 中定义的属性在 viewController2如下(但它不起作用):

这是viewController1.m :

#import "viewController1.h"

@interface viewController1 ()

@property (nonatomic) MPMoviePlayerController *videoPlayer;

@end

@implementation viewController1

...

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    ...

    self.videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];

    ...

    [self.videoPlayer play];

    ...
}

这是 viewController2.m :

#import "viewController2.h"
#import "viewController1.h"

@interface viewController2 ()

@end

@implementation viewController2

...

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    viewController1 *thePlayer;
    [thePlayer.videoPlayer pause];

    //This is where I get an error:
    //Property 'videoPlayer' not found on object of type 'viewController1 *'
}

我已经尝试了很多搜索，但我无法弄清楚我做错了什么。任何帮助将不胜感激。

谢谢! :)

Answer 1

你有你的 videoPlayer您在 viewController1.m 中定义的属性，但您导入 viewController1.h .

搬家 videoPlayer至 viewController1.h .请勿导入 viewController1.m .