Objective-C定义供多个ViewControllers使用的全局数组

// GlobalArrayManager.h

#import <Foundation/Foundation.h>

@interface GlobalArrayManager : NSObject

@property (nonatomic, strong) NSMutableArray *globalArray;

+ (instancetype)sharedInstance;

@end

// GlobalArrayManager.m

#import "GlobalArrayManager.h"

@implementation GlobalArrayManager

+ (instancetype)sharedInstance {
    static GlobalArrayManager *sharedInstance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[GlobalArrayManager alloc] init];
        sharedInstance.globalArray = [NSMutableArray array]; // 初始化全局数组
    });
    return sharedInstance;
}

@end

// 使用全局数组的ViewController.m

#import "GlobalArrayManager.h"

// 添加对象到全局数组
[[GlobalArrayManager sharedInstance].globalArray addObject:myObject];

// 访问全局数组中的对象
myObject = [[GlobalArrayManager sharedInstance].globalArray objectAtIndex:index];

// 遍历全局数组
for (NSObject *object in [GlobalArrayManager sharedInstance].globalArray) {
    // 处理对象
}

// 清空全局数组
[[GlobalArrayManager sharedInstance].globalArray removeAllObjects];