如何计算在uiimageview中加载图像所需的时间

Question

如何计算在uiimageview中加载图像所需的时间。我在点击按钮上使用此代码

-(IBAction)loadImage:(id)sender
{
    //Using block to create image view through NSOperationQueue
    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    [queue addOperationWithBlock: ^{

    //Create image view and adding it to the view
    imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 375)];
    imageView.image = [UIImage imageNamed:@"Yellow_Red_Parrot.jpg"];
    [self.view addSubview:imageView];

    }];
}

我想计算点击图片视图中加载的图片所需的时间。任何人都可以帮助我。

提前致谢

Answer 1

在开始操作之前，请添加：

NSDate *startDate=[NSDate date];

操作结束后，添加：

NSDate *endDate=[NSDate date];
double ellapsedSeconds=[endDate timeIntervalSinceDate:startDate];