Question

当我按下按钮时，没有任何反应。我该如何解决这个问题？

整数x在.h文件中声明。编辑：按钮定义x的值，正如您在代码中看到的那样，x被添加到旋转持续时间。当我按下按钮时，持续时间不会增加。这是我的代码：

#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>

@interface ViewController ()

@end

@implementation ViewController

- (IBAction)button1:(UIButton *)sender {x=10;}

- (IBAction)button2:(UIButton *)sender {x=3;
}
- (void)viewDidLoad
{ CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];

    fullRotation.fromValue = [NSNumber numberWithFloat:0];
    fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
    fullRotation.duration = 10+x;
    fullRotation.repeatCount= 1000;
    [[_stick layer] addAnimation:fullRotation forKey:@"60"];

    [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.
}

@end

Answer 1

viewDidLoad方法在视图控制器对象生存期中仅执行一次。它在加载了它的视图的所有子视图后执行。你必须在类级别声明动画对象，然后在按钮的ibaction中更改它的持续时间。

在viewDidLoad中对IBAction没有影响？

1 个答案: