如果想调用某个类的某个方法可以写成这样,这个方法来自NSObject类
performSelector:
performSelector:withObject:
performSelector:withObject:withObject:
实际调用
[self performSelector:@selector(displayViews) withObject:nil afterDelay:1.0f];
这里有三个方法
//父视图
[self.view superview]
//所有子视图
[self.view subviews]
//自身的window
self.view.window
循环一个视图下面所有视图的方法
NSArray *allSubviews(UIView *aView)
{
NSArray *results = [aView subviews];
for (UIView *eachView in [aView subviews])
{
NSArray *riz = allSubviews(eachView);
if (riz) {
results = [results arrayByAddingObjectsFromArray:riz];
}
}
return results;
}
循环返回一个Application里面所有的View
// Return all views throughout the application
NSArray *allApplicationViews()
{
NSArray *results = [[UIApplication sharedApplication] windows];
for (UIWindow *window in [[UIApplication sharedApplication] windows])
{
NSArray *riz = allSubviews(window);
if (riz) results = [results arrayByAddingObjectsFromArray: riz];
}
return results;
}
找出所有的父视图
// Return an array of parent views from the window down to the view
NSArray *pathToView(UIView *aView)
{
NSMutableArray *array = [NSMutableArray arrayWithObject:aView];
UIView *view = aView;
UIWindow *window = aView.window;
while (view != window)
{
view = [view superview];
[array insertObject:view atIndex:0];
}
return array;
}
UIView提供了大量管理视图的方法
//加一个视图到一个视图里面
addSubview:
//将一个视图移到前面
bringSubviewToFront:
//将一个视图推送到背后
sendSubviewToBack:
//把视图移除
removeFromSuperview
//插入视图 并指定索引
insertSubview:atIndex:
//插入视图在某个视图之上
insertSubview:aboveSubview:
//插入视图在某个视图之下
insertSubview:belowSubview:
//交换两个位置索引的视图
exchangeSubviewAtIndex:withSubviewAtIndex:
视图回调
//当加入视图完成后调用
(void)didAddSubview:(UIView *)subview
//当视图移动完成后调用
(void)didMoveToSuperview
//当视图移动到新的WINDOW后调用
(void)didMoveToWindow
//在删除视图之后调用
(void)willRemoveSubview:(UIView *)subview
//当移动视图之前调用
(void)didMoveToSuperview:(UIView *)subview
//当视图移动到WINDOW之前调用
(void)didMoveToWindow
给UIView设置标记和检索视图
myview.tag = 1001;
[self.view viewWithTag:1001];
(UILable *)[self.view.window viewWithTag:1001];
视图的几何特征
//框架
struct CGPoint {
CGFloat x;
CGFloat y;
};
typedef struct CGPoint CGPoint;
/* Sizes. */
struct CGSize {
CGFloat width;
CGFloat height;
};
typedef struct CGSize CGSize;
struct CGRect {
CGPoint origin;
CGSize size;
};
typedef struct CGRect CGRect;
CGRect rect = CGRectMake(0,0,320,480);
UIView *view = [[UIView allow]initWithFrame:rect];
//将String转成CGPoint 如 @”{3.0,2.5}” {x,y}
CGPoint CGPointFromString (
NSString *string
);
//将String转成CGRect @”{{3,2},{4,5}}” {{x,y},{w, h}}
CGRect CGRectFromString (
NSString *string
);
//将String转成CGSize @”{3.0,2.5}” {w, h}
CGSize CGSizeFromString (
NSString *string
);
//CGPoint转成NSString
NSString * NSStringFromCGPoint (
CGPoint point
);
//CGRect转成NSString
NSString * NSStringFromCGRect (
CGRect rect
);
//CGSize转成NSString
NSString * NSStringFromCGSize (
CGSize size
);
//对一个CGRect进行修改 以这个的中心来修改 正数表示更小(缩小) 负数表示更大(放大)
CGRect CGRectInset (
CGRect rect,
CGFloat dx,
CGFloat dy
);
//判断两个矩形是否相交
bool CGRectIntersectsRect (
CGRect rect1,
CGRect rect2
);
//初始为0的
const CGPoint CGPointZero;
const CGRect CGRectZero;
const CGSize CGSizeZero;
//创建CGPoint
CGPoint CGPointMake (
CGFloat x,
CGFloat y
);
//创建CGRect
CGRect CGRectMake (
CGFloat x,
CGFloat y,
CGFloat width,
CGFloat height
);
//创建CGSize
CGSize CGSizeMake (
CGFloat width,
CGFloat height
);
放射变换
旋转
CGAffineTransform form=CGAffineTransformMakeRotation(π*(0~2)) //改变旋转角度
CGAffineTransform form=CGAffineTransformMakeTranslation(70, 0) //改变位置
//在0-2*PI之间比较好 旋转
CGAffineTransform form=CGAffineTransformMakeRotation(π*0.5) //缩放
view.transform = form
view.transform = CGAffineTransformIdentity; 复原
//配合使用
//先修改 后缩放
CGAffineTransform scaled = CGAffineTransformScale(transform, degree, degree);
//先修改 后改变位置
CGAffineTransform transform = CGAffineTransformTranslate(
CGAffineTransform t,
CGFloat tx,
CGFloat ty
);
//修改角度
CGAffineTransform transform = CGAffineTransformRotate (
CGAffineTransform t,
CGFloat angle
);
//最后设置到VIEW
[self.view setTransform:scaled];
简历UIView动画模块
CGContextRef context = UIGraphicsGetCurrentContext();
//标记动画开始
[UIView beginAnimations:nil context:context];
//定义动画加速或减速的方式
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
//定义动画的时长 1秒
[UIView setAnimationDuration:1.0];
//中间处理 位置变化，大小变化，旋转，等等的
[[self.view viewWithTag:999] setAlpha:1.0f];
//标志动画块结束
[UIView commitAnimations];
//还可以设置回调
[UIView setAnimationDelegate:self];
//设置回调调用的方法
[UIView setAnimationDidStopSelector:@selector(animationFinished:)];
视图翻转
UIView *whiteBackdrop = [self.view viewWithTag:100];
// Choose left or right flip 选择左或右翻转
if ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex]){
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:whiteBackdrop cache:YES];
}else{
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:whiteBackdrop cache:YES];
}
NSInteger purple = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:999]];
NSInteger maroon = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:998]];
//交换视图
[whiteBackdrop exchangeSubviewAtIndex:purple withSubviewAtIndex:maroon];
//动画枚举
typedef enum {
UIViewAnimationTransitionNone,//没有任何效果
UIViewAnimationTransitionFlipFromLeft, //左反转
UIViewAnimationTransitionFlipFromRight,//右翻转
UIViewAnimationTransitionCurlUp,//上翻页
UIViewAnimationTransitionCurlDown,//下翻页
} UIViewAnimationTransition;
swfit实现翻转
demo如右翻转：
防射变化123.gif
func initViews(){//初始化
let view = UIView(frame:SView.bounds)
view.backgroundColor = UIColor.redColor()
let view1 = UIView(frame:SView.bounds)
view1.backgroundColor = UIColor.blackColor()
SView.addSubview(view)
SView.addSubview(view1)
}
func animationStart(){动画执行
UIView.beginAnimations("animationID", context: nil)
UIView.setAnimationDuration(0.5)
UIView.setAnimationCurve(.EaseInOut)
UIView.setAnimationRepeatAutoreverses(false)
UIView.setAnimationTransition(.FlipFromRight, forView: SView, cache: true)
SView.exchangeSubviewAtIndex(atIndex, withSubviewAtIndex: withIndex)
UIView.commitAnimations()
}
