一道 iOS 内存相关的题目

Posted 2022-10-22 ZCLegendary

运行下面的程序,结果是怎样的?

//
//  ViewController.m
//  拖拽按钮
//
//  Created by 张闯 on 2018/12/12.
//  Copyright © 2018 Rotai. All rights reserved.
//

#import "ViewController.h"
#import "ClassA.h"

@interface ViewController ()

@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *age;
@property (nonatomic, copy) NSString *address;

@end

@implementation ViewController


- (void)viewDidLoad 
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    for (int i = 0; i < 1000; i++) 
        dispatch_async(dispatch_get_global_queue(0, 0), ^
            self.name = @"123123123123123123";
        );
    
    NSLog(@"%@", self.name);
    
    for (int i = 0; i < 1000; i++) 
        dispatch_async(dispatch_get_global_queue(0, 0), ^
            self.age = [NSString stringWithFormat:@"%@", @"1231"];
        );
    
    NSLog(@"%@", self.age);
    
    for (int i = 0; i < 1000; i++) 
        dispatch_async(dispatch_get_global_queue(0, 0), ^
            self.address = [NSString stringWithFormat:@"%@", @"asdfsdfasdfadfadfa"];
        );
    
    NSLog(@"%@", self.address);
    



@end