ITEEDU

iPhone动画翻页效果实现的难点总结

1.添加touch事件

//用下边两个函数来记录touch的起始和终止位置
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	
	UITouch *touch = [touches anyObject];
       startPosition = [touch locationInView:self.view];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
	UITouch *touch = [touches anyObject];
    endPosition = [touch locationInView:self.view];
	[self handleFlip];

}

2.动画效果

//调用系统本身的动画显示效果 

[UIView beginAnimations:@"animationID" context:nil]; 

[UIView setAnimationDuration:0.7f]; 

[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; 

[UIView setAnimationRepeatAutoreverses:NO]; 

UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES]; 

[currentView removeFromSuperview]; 

[self.view addSubview:contentView]; 

[UIView commitAnimations]; 

//动画显示只有2中，一种是 UIViewAnimationTransitionCurlDown；一种是 UIViewAnimationTransitionCurlUp.	

3.touch动作处理

只要x2<x1，则是向前翻页，否则向后翻页；在翻页时，确定翻到哪个页面是通过UIView的tag来记录的，手工将当前的数据源的index赋值于tag即可。