Ios 从左到中移动UIImageView_Ios_Objective C

Ios 从左到中移动UIImageView

ios objective-c

Ios 从左到中移动UIImageView,ios,objective-c,Ios,Objective C,我想将图像视图从左移到视图的中心以下是我的代码： CGPoint origin = self.headerImage.center; CGPoint target = CGPointMake(0, self.headerImage.center.x); CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"position.x"]; bounce.fromValue = [NSNumber numberWith

我想将图像视图从左移到视图的中心

以下是我的代码：

CGPoint origin = self.headerImage.center;
CGPoint target = CGPointMake(0, self.headerImage.center.x);

CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"position.x"];
bounce.fromValue = [NSNumber numberWithInt:origin.x];
bounce.toValue = [NSNumber numberWithInt:target.x];
[self.headerImage.layer addAnimation:bounce forKey:@"position"];

加载视图控制器时，它必须从左侧开始移动，并在中心停止。但它不能正常工作。我该如何分类呢？

使用

[UIView animateWithDuration:1.0 animations:^{
    headerImage.frame = myNewFrameRect;
}];

使用

target

需要指明视图的中心：

CGPointMake（self.view.center.x，self.view.center.y）

更改

fillMode

removedOnCompletion

自动反转

重复计数

以避免帧更改（动画的最终）

最终代码：

CGPoint origin = self.headerImage.center;
CGPoint target = CGPointMake(self.view.center.x, self.view.center.y);
CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"position.x"];
bounce.duration = 1;
bounce.fromValue = [NSNumber numberWithInt:origin.x];
bounce.toValue = [NSNumber numberWithInt:target.x];
bounce.fillMode = kCAFillModeForwards;
bounce.removedOnCompletion = NO;
bounce.autoreverses = NO;
bounce.repeatCount = 0;
[self.headerImage.layer addAnimation:bounce forKey:@"position"];
CGAffineTransform transform = CGAffineTransformMakeScale(1.3, 1.3);
self.headerImage.transform = transform;

target

需要指明视图的中心：

CGPointMake（self.view.center.x，self.view.center.y）

更改

fillMode

removedOnCompletion

自动反转

重复计数

以避免帧更改（动画的最终）

最终代码：

CGPoint origin = self.headerImage.center;
CGPoint target = CGPointMake(self.view.center.x, self.view.center.y);
CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"position.x"];
bounce.duration = 1;
bounce.fromValue = [NSNumber numberWithInt:origin.x];
bounce.toValue = [NSNumber numberWithInt:target.x];
bounce.fillMode = kCAFillModeForwards;
bounce.removedOnCompletion = NO;
bounce.autoreverses = NO;
bounce.repeatCount = 0;
[self.headerImage.layer addAnimation:bounce forKey:@"position"];
CGAffineTransform transform = CGAffineTransformMakeScale(1.3, 1.3);
self.headerImage.transform = transform;

问题在于：

CGPoint origin = self.headerImage.center;
CGPoint target = CGPointMake(0, self.headerImage.center.x);

你没有瞄准正确的目标，你瞄准的是

头部图像的当前中心

；所以从技术上讲，

原点

和

目标

在这里是相同的位置

将目标移动到superview的中心，您会很好：）

您也可以使用

self.view.center.x

，但它不太适合未来

此外，我注意到您使用的键在两次使用时有所不同（“position”和“position.x”）。我对CAAnimations不太满意，因此这可能首先是完全正确的