完成布尔成功不工作

Question

我正在开发一个在第二个视图控制器中带有动画的应用程序。动画完成后，我试图自动切换到下一个视图控制器。我有

完成：^(BOOL 成功){...

但它不起作用。然后我尝试了一个简单的 NSLog@"... 但这也不起作用。我猜问题是 BOOL 没有完成或注册为成功。我的动画发生并完成了......但完成 BOOL 是没有执行。请帮忙。

来自 secondViewController 的 .m 文件...

#import "secondViewController.h"

@interface secondViewController ()

@property (nonatomic,weak) IBOutlet UIImageView *animatedImage;

@end

@implementation secondViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (void)viewDidAppear:(BOOL)animated
{
[self moveUp:nil finished:nil context:nil];
}
- (void)moveUp:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {

[UIView animateWithDuration:2.0
                      delay:1.0
 options:      (UIViewAnimationCurveEaseInOut|UIViewAnimationOptionAllowUserInteraction)
                 animations:^{
                     [UIView setAnimationDelegate:self];
                     [UIView setAnimationDidStopSelector:@selector(moveDown:finished:context:)];
                     self.animatedImage.center = CGPointMake(160, 304);
                 }
                 completion:^(BOOL finished){
                     NSLog(@"Move up done");

                 }];


}

- (void)moveDown:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {


[UIView animateWithDuration:2.0
                      delay:1.5
           options:  (UIViewAnimationCurveEaseInOut|UIViewAnimationOptionAllowUserInteraction)
                 animations:^{
                     [UIView setAnimationDelegate:self];
                     [UIView setAnimationDidStopSelector:@selector(moveUp:finished:context:)];
                     self.animatedImage.center = CGPointMake(160, 775);

                 }
                 completion:^(BOOL finished){

                    [self performSegueWithIdentifier:@"backHome" sender:self];
                 }];
}

@end

Answer 1

下面的代码会很好读。

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated]; //Invoke super method
    [self doAnimation];
}

- (void)doAnimation{
    [UIView animateWithDuration:2.0
                      delay:1.0
                    options:(UIViewAnimationCurveEaseInOut|UIViewAnimationOptionAllowUserInteraction)
                 animations:^{
                     self.animatedImage.center = CGPointMake(160, 304);
                 }
                 completion:^(BOOL finished){
                    [UIView animateWithDuration:2.0
                                          delay:1.5
                                        options:(UIViewAnimationCurveEaseInOut|UIViewAnimationOptionAllowUserInteraction)
                                     animations:^{
                                           self.animatedImage.center = CGPointMake(160, 775);
                                     }
                                     completion:^(BOOL finished){
                                           [self performSegueWithIdentifier:@"backHome" sender:self];
                                     }
                   ];}

    }];
}

Answer 2

您正在结合旧式动画和基于块的动画。不要那样做。

删除

[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:...];

可能会解决问题。而是将完成逻辑放在完成块中。