用NSTimer改变UIImage？ [英] Changing UIImage with NSTimer?

问题描述

所以我这个项目的最终目标是拥有一些图像和一个 UIImageview 并让图像每10秒更换一次，我目前拥有 NSTimer 设置和图像数组但是我不知道如何同时使用 NSTimer 和UIImage视图。
到目前为止，这就是我所拥有的：

So my ultimate goal for this project is to have a couple images and a UIImageview and to have the image change every 10 seconds, I currently have the NSTimer set up and the array of images however I don't know how to utilize both the NSTimer and UIImage view together. So far this is what I have:

在我的.h：

#import <UIKit/UIKit.h>

@interface HomeViewController : UIViewController {
NSTimer *myTimer;
IBOutlet UIImageView *imageview;
}

@property (nonatomic, strong) NSArray *images;

在我的.m

- (void)viewDidLoad
{
[super viewDidLoad];

myTimer = [NSTimer scheduledTimerWithTimeInterval:10.00 target:self      selector:@selector(changeImage) userInfo:nil repeats:YES];
}

- (void)changeImage
{
_images = @[@"Background 3.png", @"Background.png", @"Background 2.png", @"Background 4.png", @"Background 5.png"];

//stuck here, how do I change the image using the NStimer interval????

}

所以现在你已经看过代码了，我是无法弄清楚changeImage方法应该包含哪些内容。正好回顾一下我希望数组中的5个图像在UIImage视图中每10秒循环一次。我已经尝试了很多选项，但我无法确定它。任何帮助将不胜感激。

So now that you've seen the code, I am having trouble figuring out what should go inside the changeImage method. Just in review what I would like is for the 5 images in the array to cycle every 10 seconds in the UIImage view. I've tried lots of options I just can't fiqure it out. Any help would be greatly appreciated.

推荐答案

您可以使用以下代码执行此操作。

You can simply do this using the following code.

- (void)viewDidLoad
{
   [super viewDidLoad];
   _images = @[@"Background 3.png", @"Background.png", @"Background 2.png", @"Background 4.png", @"Background 5.png"];
   myTimer = [NSTimer scheduledTimerWithTimeInterval:10.00 target:self selector:@selector(changeImage) userInfo:nil repeats:YES];
}

- (void)changeImage
{
  static int counter = 0;
  if([_images count] == counter+1)
  {
      counter = 0;
  }
  imageview.image = [UIImage imageNamed:[_images objectAtIndex:counter];

  counter++;
}

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