如何向 a 添加动画以UITextField指示错误密码，就像 facebook 应用程序（在登录屏幕）或 Mac OS X 登录框中的密码一样？
先感谢您。
问问题
15105 次
12 回答
44
类似的东西
-(void)shake:(UIView *)theOneYouWannaShake
{
[UIView animateWithDuration:0.03 animations:^
{
theOneYouWannaShake.transform = CGAffineTransformMakeTranslation(5*direction, 0);
}
completion:^(BOOL finished)
{
if(shakes >= 10)
{
theOneYouWannaShake.transform = CGAffineTransformIdentity;
return;
}
shakes++;
direction = direction * -1;
[self shake:theOneYouWannaShake];
}];
}
所以你还需要三件事：一个 int direction 在摇动之前设置为 1 称为 int 摇动，在调用摇动之前设置为 0 和一个常量 MAX_SHAKES，它与你喜欢的一样大。希望有帮助。
编辑：
像这样称呼它：
direction = 1;
shakes = 0;
[self shake:aUIView];
在头文件里面添加
int direction;
int shakes;
于 2012-04-24T09:51:42.893 回答
13
（2015 年 1 月 16 日）更新：（枚举 UIViewAnimationOptions）演员很好，并且 UIViewAnimationOptionCurveEaseOut 在 typedef NS_OPTIONS(NSUInteger, UIViewAnimationOptions) 下每个 UIView.h 为 2 << 16
（2013 年 1 月 31 日）进一步修改了凯的回答，包括：
- 0.01s 的边沿延迟
- 轻松进出
- 将每次摇晃的持续时间从 0.09 减少到 0.04
- 每 1 个完整循环（右-左-右）将运动降低 1 个百分点
注意：如果您计划同时摇动两个控件（电子邮件和密码），您可能希望避免使用类或静态变量进行摇动和翻译。相反，初始化并传递shake 和translate 作为参数。我使用了静态，所以不需要类变量。
-(void)shakeAnimation:(UIView*) view {
const int reset = 5;
const int maxShakes = 6;
//pass these as variables instead of statics or class variables if shaking two controls simultaneously
static int shakes = 0;
static int translate = reset;
[UIView animateWithDuration:0.09-(shakes*.01) // reduce duration every shake from .09 to .04
delay:0.01f//edge wait delay
options:(enum UIViewAnimationOptions) UIViewAnimationCurveEaseInOut
animations:^{view.transform = CGAffineTransformMakeTranslation(translate, 0);}
completion:^(BOOL finished){
if(shakes < maxShakes){
shakes++;
//throttle down movement
if (translate>0)
translate--;
//change direction
translate*=-1;
[self shakeAnimation:view];
} else {
view.transform = CGAffineTransformIdentity;
shakes = 0;//ready for next time
translate = reset;//ready for next time
return;
}
}];
}
于 2013-02-01T01:55:10.553 回答
9
这个 Swift 2.0 答案不需要递归和循环。只需CABasicAnimation通过完善这个 SO 答案来利用：
func shakeView(shakeView: UIView) {
let shake = CABasicAnimation(keyPath: "position")
let xDelta = CGFloat(5)
shake.duration = 0.15
shake.repeatCount = 2
shake.autoreverses = true
let from_point = CGPointMake(shakeView.center.x - xDelta, shakeView.center.y)
let from_value = NSValue(CGPoint: from_point)
let to_point = CGPointMake(shakeView.center.x + xDelta, shakeView.center.y)
let to_value = NSValue(CGPoint: to_point)
shake.fromValue = from_value
shake.toValue = to_value
shake.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
shakeView.layer.addAnimation(shake, forKey: "position")
}
为 Swift 4 更新：
func shakeView(_ shakeView: UIView) {
let shake = CABasicAnimation(keyPath: "position")
let xDelta = CGFloat(5)
shake.duration = 0.15
shake.repeatCount = 2
shake.autoreverses = true
let from_point = CGPoint(x: shakeView.center.x - xDelta, y: shakeView.center.y)
let from_value = NSValue(cgPoint: from_point)
let to_point = CGPoint(x: shakeView.center.x + xDelta, y: shakeView.center.y)
let to_value = NSValue(cgPoint: to_point)
shake.fromValue = from_value
shake.toValue = to_value
shake.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
shakeView.layer.add(shake, forKey: "position")
}
于 2016-01-01T22:45:25.850 回答
8
基于先前的答案作为可以使用的快速方法：
func shakeTextField(textField: UITextField, numberOfShakes: Int, direction: CGFloat, maxShakes: Int) {
let interval: TimeInterval = 0.03
UIView.animate(withDuration: interval, animations: { () -> Void in
textField.transform = CGAffineTransform(translationX: 5 * direction, y: 0)
}, completion: { (aBool :Bool) -> Void in
if (numberOfShakes >= maxShakes) {
textField.transform = .identity
textField.becomeFirstResponder()
return
}
self.shakeTextField(textField: textField, numberOfShakes: numberOfShakes + 1, direction: direction * -1, maxShakes: maxShakes)
})
}
调用它：
shakeTextField(aTextField,numberOfShakes:0, direction :1, maxShakes : 10)
于 2015-03-24T11:56:40.173 回答
3
如果您来这里寻找 MonoTouch 的答案，这里是Dickey 代码的粗略翻译：
public static void /*Harlem*/Shake (this UIView view, int shakes = 6, int translation = 5)
{
UIView.Animate (0.03 + (shakes * 0.01), 0.01, UIViewAnimationOptions.CurveEaseInOut, () => {
view.Transform = CGAffineTransform.MakeTranslation (translation, 0);
}, () => {
if (shakes == 0) {
view.Transform = CGAffineTransform.MakeIdentity ();
return;
}
if (translation > 0)
translation --;
translation *= -1;
shakes --;
Shake (view, shakes, translation);
});
}
把它和你的其他扩展方法放在一起，然后像这样调用：
password.Shake ();
于 2013-03-16T20:36:23.273 回答
3
我为 UIView 创建了一个类别方法，可用于摇动任何元素 - 例如 UITextField - 能够在摇动结束后获得通知。以下是如何使用它：
[myPasswordField shake];
// Or with a callback after the shake
[myPasswordField shakeWithCallback:^{
NSLog(@"Shaking has ended");
}];
这是代码。
UIView+Shake.h
#import <UIKit/UIKit.h>
@interface UIView (UIView_Shake)
-(void)shake;
-(void)shakeWithCallback:(void (^)(void))completeBlock;
@end
UIView+Shake.m
#import "UIView+Shake.h"
#import <objc/runtime.h>
@implementation UIView (UIView_Shake)
static void *NumCurrentShakesKey;
static void *NumTotalShakesKey;
static void *ShakeDirectionKey;
- (int)numCurrentShakes {
return [objc_getAssociatedObject(self, &NumCurrentShakesKey) intValue];
}
- (void)setNumCurrentShakes:(int)value {
objc_setAssociatedObject(self, &NumCurrentShakesKey, [NSNumber numberWithInt:value], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (int)numTotalShakes {
return [objc_getAssociatedObject(self, &NumTotalShakesKey) intValue];
}
- (void)setNumTotalShakes:(int)value {
objc_setAssociatedObject(self, &NumTotalShakesKey, [NSNumber numberWithInt:value], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (int)shakeDirection {
return [objc_getAssociatedObject(self, &ShakeDirectionKey) intValue];
}
- (void)setShakeDirection:(int)value {
objc_setAssociatedObject(self, &ShakeDirectionKey, [NSNumber numberWithInt:value], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
-(void)shake {
[self shakeNextWithCompleteBlock:nil];
}
-(void)shakeWithCallback:(void (^)(void))completeBlock {
self.numCurrentShakes = 0;
self.numTotalShakes = 6;
self.shakeDirection = 8;
[self shakeNextWithCompleteBlock:completeBlock];
}
-(void)shakeNextWithCompleteBlock:(void (^)(void))completeBlock
{
UIView* viewToShake = self;
[UIView animateWithDuration:0.08
animations:^
{
viewToShake.transform = CGAffineTransformMakeTranslation(self.shakeDirection, 0);
}
completion:^(BOOL finished)
{
if(self.numCurrentShakes >= self.numTotalShakes)
{
viewToShake.transform = CGAffineTransformIdentity;
if(completeBlock != nil) {
completeBlock();
}
return;
}
self.numCurrentShakes++;
self.shakeDirection = self.shakeDirection * -1;
[self shakeNextWithCompleteBlock:completeBlock];
}];
}
@end
于 2015-03-17T15:50:39.143 回答
2
这是我的看法：
@implementation UITextField (Shake)
- (void)shake {
[self shakeWithIterations:0 direction:1 size:4];
}
#pragma mark - Private
- (void)shakeWithIterations:(int)iterations direction:(int)direction size:(int)size {
[UIView animateWithDuration:0.09-(iterations*.01) animations:^{
self.transform = CGAffineTransformMakeTranslation(size*direction, 0);
} completion:^(BOOL finished) {
if (iterations >= 5 || size <= 0) {
self.transform = CGAffineTransformIdentity;
return;
}
[self shakeWithIterations:iterations+1 direction:direction*-1 size:MAX(0, size-1)];
}];
}
@end
于 2014-06-03T05:24:48.250 回答
2
我尝试了@stefreak 解决方案，但循环方法在 iOS 7.1 上不起作用。所以我结合了@stefreak 和@Chris 的解决方案，并添加了完成块，以便在摇动完成时得到通知。这是我的代码：
- (void)shakeView:(UIView *)view iterations:(NSInteger)iterations direction:(NSInteger)direction completion:(void (^)())completion
{
const NSInteger MAX_SHAKES = 6;
const CGFloat SHAKE_DURATION = 0.05;
const CGFloat SHAKE_TRANSFORM = 10.0;
[UIView animateWithDuration:SHAKE_DURATION
delay:0.0
options:UIViewAnimationOptionCurveEaseIn
animations:^{
view.transform = iterations >= MAX_SHAKES ? CGAffineTransformIdentity : CGAffineTransformMakeTranslation(SHAKE_TRANSFORM * direction, 0);
} completion:^(BOOL finished) {
if (finished)
{
if (iterations >= MAX_SHAKES)
{
if (completion)
{
completion();
}
}
else
{
[self shakeView:view iterations:(iterations + 1) direction:(direction * -1) completion:completion];
}
}
}];
}
- (void)shakeView:(UIView *)view completion:(void (^)())completion
{
[self shakeView:view iterations:0 direction:1 completion:completion];
}
于 2015-02-07T20:57:03.783 回答
1
您也可以使用基本动画来完成
let animation = CABasicAnimation(keyPath: "position")
animation.duration = 0.09
animation.repeatCount = 4
animation.autoreverses = true
animation.fromValue = NSValue(CGPoint: CGPointMake(txtField.center.x - 10, txtField.center.y))
animation.toValue = NSValue(CGPoint: CGPointMake(txtField.center.x + 10, txtField.center.y))
txtField.layer.addAnimation(animation, forKey: "position")
在这里你可以改变duration， . 改变repeatCount成fromValue并且toValue会改变在摇动中移动的距离
于 2017-04-18T07:12:26.107 回答
1
由于问题是关于 Objective-C 的，并且由于我在我的项目中使用 Objective-C，我认为这个以前的 Swift 答案的 Objective-C 翻译可能对其他人有用：
- (void)shakeView:(UIView*)view
{
CABasicAnimation *shake = [CABasicAnimation animationWithKeyPath:@"position"];
CGFloat xDelta = 5.0;
shake.duration = 0.15;
shake.repeatCount = 2;
shake.autoreverses = YES;
CGPoint fromPoint = CGPointMake(view.center.x - xDelta, view.center.y);
CGPoint toPoint = CGPointMake(view.center.x + xDelta, view.center.y);
shake.fromValue = [NSValue valueWithCGPoint:fromPoint];
shake.toValue = [NSValue valueWithCGPoint:toPoint];
shake.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[view.layer addAnimation:shake forKey:@"position"];
}
于 2018-02-23T15:47:43.773 回答
0
这里有一个 Swift 库，用于在 github 中为 Textfield 设置动画。只需导入 swift 文件并实现如下
// Shake with the default speed
self.textField.shake(10, delta:5) //10 no. of shakes with 5 points wide
// Shake with a custom speed
self.sampleText.shake(10, delta: 5, speed: 0.10) //10 no. of shakes with 5 points wide in 100ms per shake
于 2015-06-17T12:35:17.447 回答
0
Swift 3 和 stack_view instaed textField
func shakeTextField (stack_view : UIStackView, numberOfShakes : Int, direction: CGFloat, maxShakes : Int) {
let interval : TimeInterval = 0.05
UIView.animate(withDuration: interval, animations: { () -> Void in
stack_view.transform = CGAffineTransform(translationX: 5 * direction, y: 0)
}, completion: { (aBool :Bool) -> Void in
if (numberOfShakes >= maxShakes) {
stack_view.becomeFirstResponder()
return
}
self.shakeTextField(stack_view: stack_view, numberOfShakes: numberOfShakes + 1, direction: direction * -1, maxShakes: maxShakes )
})
}
于 2017-07-23T06:50:30.493 回答