目标C:在不同的类中使用NSMutableArray [英] objective C: use NSMutableArray in different classes

问题描述

在创建了NSMutableArray * arrayImage之后，我创建了两个UIImageView * image1和* image2，现在我要填充此数组

I created two UIImageView *image1 and *image2, after I created a NSMutableArray *arrayImage, now I want fill this array

arrayImage = [[NSMutableArray alloc] initWithObjects: image1, image2, nil];

但是我在ClassA中创建了UIImageView和NSMutableArray，但是我想在ClassB .m中的viewdidload中填充NSMutableArray，然后Xcode告诉我未声明image1和image2.我只是使用属性和合成.我该怎么办?

but I created UIImageView and NSMutableArray in a ClassA but I want fill the NSMutableArray in the viewdidload in .m of ClassB, then Xcode tell me that image1 and image2 are undeclared. I just used property and synthesize. What can I do?

推荐答案

您可以尝试这样的操作，必须在classA内保留对classB的引用，以便在要向classB中的数组添加视图时访问classB的属性通过classA的clasB属性.尝试这样的事情.

You can try something like this, you have to keep a reference to classB inside classA so that when you want to add a view to array in classB you can access classB's properties through classA's clasB property. Try something like this.

//ClassA .h file 
#import @"ClassB.h"
@interface ClassA : UIViewController { 
    UIImageView     *view1, view2*;
    ClassB          *classB; 
}
@end

//Inside ClassA .m file 
-(void)viewDidLoad{
    //construct view1 and view2 here or make the IBOutlets and link them in IB 
    classB = [[ClassB alloc] init];
    [classB.imageArray addObject:view1];
    [classB.imageArray addObject:view2];
}

//ClassB .h file 
@interface ClassB : UIViewController {
    NSMutableArray *imageArray; 
}
@property(nonatomic, retain) NSMutableArray *imageArray; 
@end


//Inside ClassB .m file
@synthesize imageArray; 

-(id)init{
    if (self = [super init]){
        imageArray = [[NSMutableArray alloc] init];
    }
    return self; 
}

-(void)dealloc{
    [imageArray release];
    [super dealloc];
}

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