iOS字体抖动动画的实现代码

ViewController.m

#import"ViewController.h"

@interfaceViewController ()

@end

@implementationViewController

- (void)viewDidLoad {

  [superviewDidLoad];

  // Do any additional setup after loading the view, typically from a nib.

  UIButton *button=[UIButton buttonWithType:UIButtonTypeRoundedRect];

  button.frame=CGRectMake(10,100,100,200);

  button.backgroundColor=[UIColor redColor];

  [button setTitle:@"按钮"forState:UIControlStateNormal];

  [self.view addSubview:button];

  //按钮的动画效果

  [self buttonAnimation:button];

}

//按钮出现的时候有一个动画效果

- (void)buttonAnimation:(UIButton *)sender

{

  CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];

  CATransform3D scale1 = CATransform3DMakeScale(0.5,0.5,1);

  CATransform3D scale2 = CATransform3DMakeScale(1.2,1.2,1);

  CATransform3D scale3 = CATransform3DMakeScale(0.9,0.9,1);

  CATransform3D scale4 = CATransform3DMakeScale(1.0,1.0,1);

  NSArray *frameValues = [NSArray arrayWithObjects:

              [NSValue valueWithCATransform3D:scale1],

              [NSValue valueWithCATransform3D:scale2],

              [NSValue valueWithCATransform3D:scale3],

              [NSValue valueWithCATransform3D:scale4],

              nil];

  [animation setValues:frameValues];

  NSArray *frameTimes = [NSArray arrayWithObjects:

              [NSNumber numberWithFloat:0.0],

              [NSNumber numberWithFloat:0.5],

              [NSNumber numberWithFloat:0.9],

              [NSNumber numberWithFloat:1.0],

              nil];

  [animation setKeyTimes:frameTimes];

  animation.fillMode = kCAFillModeForwards;

  animation.duration =0.3f;

  [sender.layer addAnimation:animation forKey:@"DSPopUpAnimation"];

}