如何在 Objective c 中使用动画导航栏按钮

Question

我想在导航栏按钮上添加这张图片，如何在导航栏右栏按钮或左栏按钮上使用这张图片？

请检查下面的代码，我正在使用这些代码在导航栏按钮上查看与工作代码相同的代码：-

- (void)viewDidLoad
  {
    [super viewDidLoad];
    // Animation

    UIImageView*animationView = [[UIImageView alloc] initWithFrame:self.view.frame];
    animationView.animationImages = [NSArray arrayWithObjects:

                                 [UIImage imageNamed:@"1.gif"],
                                 [UIImage imageNamed:@"2.gif"],
                                 [UIImage imageNamed:@"3.gif"],
                                 [UIImage imageNamed:@"4.gif"],
                                 [UIImage imageNamed:@"5.gif"],
                                 [UIImage imageNamed:@"6.gif"],nil];
    animationView.animationDuration = 1.25;
    animationView.animationRepeatCount = 0;
    [animationView startAnimating];
    [self.view addSubview:animationView];
}

让我知道怎么做在导航栏按钮上使用此代码。

谢谢！

Answer 1

我试过你的代码，加上我的小技巧，效果很神奇。

NSArray *imageArray = [NSArray arrayWithObjects:
                       [UIImage imageNamed:@"tmp-0"],
                       [UIImage imageNamed:@"tmp-1"],
                       [UIImage imageNamed:@"tmp-2"],
                       [UIImage imageNamed:@"tmp-3"],
                       [UIImage imageNamed:@"tmp-4"],
                       [UIImage imageNamed:@"tmp-5"],
                       [UIImage imageNamed:@"tmp-6"],
                       [UIImage imageNamed:@"tmp-7"],nil];

UIButton *barButton = [UIButton buttonWithType:UIButtonTypeCustom];
[barButton setImage:[UIImage imageNamed:@"tmp-0"] forState:UIControlStateNormal]; // mine trick
[barButton.imageView setAnimationImages:imageArray];
[barButton.imageView setAnimationDuration:1.0f];

[barButton.imageView startAnimating];
[barButton sizeToFit];

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:barButton];

你需要先给barButton一个图片，这样你的按钮才能做成frame

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