Question

我有一个动画从第一个控制器开始，当我从另一个控制器调用该控制器时，动画无法启动。这是我的HomeController.m：

//
//  HomeController.m
//  /

#import "HomeController.h"
#import <AVFoundation/AVFoundation.h>
#import <QuartzCore/QuartzCore.h>
#import "HomeController.h"
#include <AudioToolbox/AudioToolbox.h>

@interface HomeController (){
}
@property (strong, nonatomic) IBOutlet UILabel *accendi;
// create the label animated
@property (strong, nonatomic) IBOutlet UIImageView *arrow;
// create the image animated

@end

@implementation HomeController


- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

}

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


-(void) viewDidAppear:(BOOL)animated {
[super viewDidAppear:(BOOL)animated];

[self frecciaanimata];

}
-(void) frecciaanimata {

    CGRect arrowFrame = self.arrow.frame;
    arrowFrame.origin.x = arrowFrame.size.height;

    CGRect accendiFrame = self.accendi.frame;
    accendiFrame.origin.x = accendiFrame.size.height;

    [UIView animateWithDuration:0.7
                          delay:1.2
                        options: UIViewAnimationOptionRepeat|UIViewAnimationOptionAutoreverse
                     animations:^{
                         _arrow.frame = CGRectMake(140, 244, 14, 28);
                         _accendi.frame = CGRectMake(80, 247, 63, 21);
                     }
                     completion:^(BOOL finished){
                         NSLog(@"Done!");
//create animation block
                     }];
 }


// end of animation block
@end

当其他控制器通过按下按钮来调用此控制器（HomeController）时，是否可以启动动画？

Answer 1

将[self frecciaanimata];更改为：

[self performSelector:@selector(frecciaanimata) withObject:nil afterDelay:0.01];

<强>更新

对于最近从backGround回击时处理动画的请求，请执行以下操作：

在您的ViewDidLoad方法中：

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(someMethod)
                                             name:UIApplicationDidBecomeActiveNotification object:nil];

然后按如下方式添加someMethod：

-(void) someMethod{
    [self performSelector:@selector(frecciaanimata) withObject:nil afterDelay:0.01];

}

不重启动画到根控制器

1 个答案: