Xcode 中的 iOS 应用程序内存使用率不断上升

Question

我是 iOS 编程的新手，我刚刚构建了一个 iPhone 应用程序，它可以向用户提问并返回答案。构建环境为 OS X 10.9 和 Xcode 5.0.2。每次我启动 iPhone 模拟器时，Debug Navigator 都会显示内存使用量为 13.5mb，但即使在我返回主屏幕后它也会继续上升。一分钟后，内存使用量将稳定在 17.5mb 左右。这是正常行为还是我需要添加一些内存管理代码？

#import "QuizViewController.h"

@interface QuizViewController ()

@property (nonatomic) int currentQuestionIndex;
@property (nonatomic, copy) NSArray *questions;
@property (nonatomic, copy) NSArray *answers;

@property (nonatomic,weak) IBOutlet UILabel *questionLable;
@property (nonatomic,weak) IBOutlet UILabel *answerLable;

@end

@implementation QuizViewController

- (instancetype) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if(self){
        self.questions = @[@"From what is cognac made?",
                           @"What is 8 + 8 ?",
                           @"What is the capital of Minnesota?"];
        self.answers = @[@"Grapes",
                         @"16",
                         @"St.Paul"];
    }

    return self;
}

- (IBAction)showQuestion:(id)sender
{
    self.currentQuestionIndex++;
    if (self.currentQuestionIndex == [self.questions count]){
        self.currentQuestionIndex = 0;
    }
    NSString *question = self.questions[self.currentQuestionIndex];
    self.questionLable.text = question;
    self.answerLable.text = @"???";
}
- (IBAction)showAnswer:(id)sender
{
    NSString *answer = self.answers[self.currentQuestionIndex];
    self.answerLable.text = answer;
}

@end

Answer 1

使用 ARC 可以自动进行内存管理。您是否在输出中收到内存警告日志？如果没有，那么你很好。除此之外，我认为这是正常的。