UITextField抖动效果

@interface UITextField(shake)

- (void)shake;

@end

@implementation UITextField(shake)

- (void)shake {
    CAKeyframeAnimation *animationKey = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    [animationKey setDuration:0.5f];
    
    NSArray *array = [[NSArray alloc] initWithObjects:
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x-5, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x+5, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x-5, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x+5, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x-5, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x+5, self.center.y)],
                      [NSValue valueWithCGPoint:CGPointMake(self.center.x, self.center.y)],
                      nil];
    [animationKey setValues:array];
    [array release];
    
    NSArray *times = [[NSArray alloc] initWithObjects:
                      [NSNumber numberWithFloat:0.1f],
                      [NSNumber numberWithFloat:0.2f],
                      [NSNumber numberWithFloat:0.3f],
                      [NSNumber numberWithFloat:0.4f],
                      [NSNumber numberWithFloat:0.5f],
                      [NSNumber numberWithFloat:0.6f],
                      [NSNumber numberWithFloat:0.7f],
                      [NSNumber numberWithFloat:0.8f],
                      [NSNumber numberWithFloat:0.9f],
                      [NSNumber numberWithFloat:1.0f],
                      nil];
    [animationKey setKeyTimes:times];
    [times release];
    
    [self.layer addAnimation:animationKey forKey:@"TextFieldShake"];
}

@end

 

这个效果可以用在一些用户输入数据的合法性验证上。