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
C代码
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performSelector:
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performSelector:withObject:
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performSelector:withObject:withObject:
实际调用
C代码
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[self performSelector:@selector(displayViews) withObject:nil afterDelay:1.0f];
有三个方法分别是
C代码
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//父视图
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[self.view superview]
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//所有子视图
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[self.view subviews]
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//自身的window
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self.view.window
循环一个视图下面所有视图的方法
C代码
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NSArray *allSubviews(UIView *aView)
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{
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NSArray *results = [aView subviews];
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for (UIView *eachView in [aView subviews])
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{
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NSArray *riz = allSubviews(eachView);
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if (riz) {
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results = [results arrayByAddingObjectsFromArray:riz];
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}
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}
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return results;
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}
循环返回一个APPLICATION里面所有的VIEW
C代码
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// Return all views throughout the application
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NSArray *allApplicationViews()
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{
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NSArray *results = [[UIApplication sharedApplication] windows];
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for (UIWindow *window in [[UIApplication sharedApplication] windows])
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{
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NSArray *riz = allSubviews(window);
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if (riz) results = [results arrayByAddingObjectsFromArray: riz];
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}
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return results;
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}
找出所有的父视图
C代码
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// Return an array of parent views from the window down to the view
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NSArray *pathToView(UIView *aView)
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{
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NSMutableArray *array = [NSMutableArray arrayWithObject:aView];
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UIView *view = aView;
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UIWindow *window = aView.window;
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while (view != window)
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{
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view = [view superview];
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[array insertObject:view atIndex:0];
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}
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return array;
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}
UIView提供了大量管理视图的方法
C代码
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//加一个视图到一个视图里面
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addSubview:
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//将一个视图移到前面
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bringSubviewToFront:
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//将一个视图推送到背后
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sendSubviewToBack:
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//把视图移除
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removeFromSuperview
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//插入视图 并指定索引
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insertSubview:atIndex:
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//插入视图在某个视图之上
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insertSubview:aboveSubview:
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//插入视图在某个视图之下
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insertSubview:belowSubview:
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//交换两个位置索引的视图
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exchangeSubviewAtIndex:withSubviewAtIndex:
视图回调
C代码
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//当加入视图完成后调用
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(void)didAddSubview:(UIView *)subview
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//当视图移动完成后调用
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(void)didMoveToSuperview
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//当视图移动到新的WINDOW后调用
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(void)didMoveToWindow
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//在删除视图之后调用
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(void)willRemoveSubview:(UIView *)subview
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//当移动视图之前调用
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(void)didMoveToSuperview:(UIView *)subview
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//当视图移动到WINDOW之前调用
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(void)didMoveToWindow
给UIView设置标记和检索视图
C代码
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myview.tag = 1001;
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[self.view viewWithTag:1001];
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(UILable *)[self.view.window viewWithTag:1001];
视图的几何特征
C代码
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//框架
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struct CGPoint {
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CGFloat x;
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CGFloat y;
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};
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typedef struct CGPoint CGPoint;
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/* Sizes. */
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struct CGSize {
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CGFloat width;
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CGFloat height;
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};
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typedef struct CGSize CGSize;
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struct CGRect {
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CGPoint origin;
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CGSize size;
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};
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typedef struct CGRect CGRect;
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-
-
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CGRect rect = CGRectMake(0,0,320,480);
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UIView *view = [[UIView allow]initWithFrame:rect];
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//将String转成CGPoint 如 @”{3.0,2.5}” {x,y}
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CGPoint CGPointFromString (
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NSString *string
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);
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//将String转成CGRect @”{{3,2},{4,5}}” {{x,y},{w, h}}
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CGRect CGRectFromString (
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NSString *string
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);
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//将String转成CGSize @”{3.0,2.5}” {w, h}
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CGSize CGSizeFromString (
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NSString *string
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);
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//CGPoint转成NSString
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NSString * NSStringFromCGPoint (
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CGPoint point
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);
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//CGRect转成NSString
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NSString * NSStringFromCGRect (
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CGRect rect
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);
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//CGSize转成NSString
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NSString * NSStringFromCGSize (
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CGSize size
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);
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//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)
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CGRect CGRectInset (
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CGRect rect,
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CGFloat dx,
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CGFloat dy
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);
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//判断两个矩形是否相交
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bool CGRectIntersectsRect (
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CGRect rect1,
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CGRect rect2
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);
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//初始为0的
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const CGPoint CGPointZero;
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const CGRect CGRectZero;
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const CGSize CGSizeZero;
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//创建CGPoint
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CGPoint CGPointMake (
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CGFloat x,
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CGFloat y
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);
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//创建CGRect
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CGRect CGRectMake (
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CGFloat x,
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CGFloat y,
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CGFloat width,
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CGFloat height
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);
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//创建CGSize
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CGSize CGSizeMake (
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CGFloat width,
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CGFloat height
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);
仿射变换
C代码
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CGAffineTransform form = CGAffineTransformMakeRotation(PI);
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myview.transform = form;
如想复原
C代码
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myview.transform = CGAffineTransformIdentity;
直接设置视图的中心
C代码
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myview.center = CGPointMake(100,200);
中心
C代码
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CGRectGetMinX
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CGRectGetMinY
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//X的中间值
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CGRectGetMidX
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//Y的中间值
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CGRectGetMidY
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CGRectGetMaxX
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CGRectGetMaxY
定时器
C代码
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NSTime *timer = [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(move:) userInfo:nil repeats:YES];
定义视图边界
C代码
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typedef struct UIEdgeInsets {
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CGFloat top, left, bottom, right; // specify amount to inset (positive) for each of the edges. values can be negative to 'outset'
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} UIEdgeInsets;
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//eg
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UIEdgeInsets insets = UIEdgeInsetsMake(5, 5, 5, 5);
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CGRect innerRect = UIEdgeInsetsInsetRect([aView bounds], insets);
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CGRect subRect = CGRectInset(innerRect, self.frame.size.width / 2.0f, self.frame.size.height / 2.0f);
仿射变换补充
//创建CGAffineTransform
C代码
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//angle 在0-2*PI之间比较好 旋转
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CGAffineTransform transform = CGAffineTransformMakeRotation(angle);
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//缩放
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CGAffineTransform transform = CGAffineTransformMakeScale(0.5f,0.5f);
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//改变位置的
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CGAffineTransform transform = CGAffineTransformMakeTranslation(50,60);
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//修改CGAffineTransform
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//修改 缩放
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CGAffineTransform scaled = CGAffineTransformScale(transform, degree, degree);
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//修改 位置
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CGAffineTransform transform = CGAffineTransformTranslate(
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CGAffineTransform t,
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CGFloat tx,
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CGFloat ty
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);
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//修改角度
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CGAffineTransform transform = CGAffineTransformRotate (
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CGAffineTransform t,
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CGFloat angle
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);
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//最后设置到VIEW
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[self.view setTransform:scaled];
建立UIView动画块
//首先建立CGContextRef
C代码
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CGContextRef context = UIGraphicsGetCurrentContext();
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//标记动画开始
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[UIView beginAnimations:nil context:context];
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//定义动画加速或减速的方式
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[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
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//定义动画的时长 1秒
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[UIView setAnimationDuration:1.0];
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//中间处理 位置变化,大小变化,旋转,等等的
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[[self.view viewWithTag:999] setAlpha:1.0f];
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//标志动画块结束
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[UIView commitAnimations];
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//还可以设置回调
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[UIView setAnimationDelegate:self];
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//设置回调调用的方法
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[UIView setAnimationDidStopSelector:@selector(animationFinished:)];
视图翻转
C代码
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UIView *whiteBackdrop = [self.view viewWithTag:100];
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// Choose left or right flip 选择左或右翻转
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if ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex]){
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[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:whiteBackdrop cache:YES];
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}else{
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[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:whiteBackdrop cache:YES];
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}
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NSInteger purple = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:999]];
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NSInteger maroon = [[whiteBackdrop subviews] indexOfObject:[whiteBackdrop viewWithTag:998]];
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//交换视图
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[whiteBackdrop exchangeSubviewAtIndex:purple withSubviewAtIndex:maroon];
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//还有上翻和下翻两种 如下
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typedef enum {
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//没有任何效果
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UIViewAnimationTransitionNone,
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UIViewAnimationTransitionFlipFromLeft,
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UIViewAnimationTransitionFlipFromRight,
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UIViewAnimationTransitionCurlUp,
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UIViewAnimationTransitionCurlDown,
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} UIViewAnimationTransition;
使用QuartzCore做动画
C代码
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//创建CATransition
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CATransition *animation = [CATransition animation];
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//设置代理
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animation.delegate = self;
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//设置动画过渡的时间
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animation.duration = 4.0f;
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//定义动画加速或减速的方式
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animation.timingFunction = UIViewAnimationCurveEaseInOut;
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//animation.type 表示设置过渡的种类 如 Fade,MoveIn,Push,Reveal
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switch ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex]) {
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case 0:
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animation.type = kCATransitionFade;
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break;
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case 1:
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animation.type = kCATransitionMoveIn;
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break;
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case 2:
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animation.type = kCATransitionPush;
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break;
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case 3:
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animation.type = kCATransitionReveal;
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default:
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break;
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}
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//设置渐变的方向,上下左右
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if (isLeft)
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animation.subtype = kCATransitionFromRight;
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else
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animation.subtype = kCATransitionFromLeft;
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// Perform the animation
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UIView *whitebg = [self.view viewWithTag:10];
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NSInteger purple = [[whitebg subviews] indexOfObject:[whitebg viewWithTag:99]];
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NSInteger white = [[whitebg subviews] indexOfObject:[whitebg viewWithTag:100]];
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[whitebg exchangeSubviewAtIndex:purple withSubviewAtIndex:white];
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[[whitebg layer] addAnimation:animation forKey:@"animation"];
animation.type还可以用以下的赋值
C代码
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switch (theButton.tag) {
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case 0:
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animation.type = @"cube";
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break;
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case 1:
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animation.type = @"suckEffect";
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break;
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case 2:
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animation.type = @"oglFlip";
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break;
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case 3:
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animation.type = @"rippleEffect";
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break;
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case 4:
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animation.type = @"pageCurl";
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break;
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case 5:
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animation.type = @"pageUnCurl";
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break;
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case 6:
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animation.type = @"cameraIrisHollowOpen ";
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break;
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case 7:
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animation.type = @"cameraIrisHollowClose ";
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break;
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default:
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break;
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}
上面这个是转自这里的http://2015./blog/1122130
休眠一下
C代码
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[NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow:1.0f]];
一个简单的通过图片做的动画
C代码
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// Load butterfly images
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NSMutableArray *bflies = [NSMutableArray array];
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for (int i = 1; i <= 17; i++){
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[bflies addObject:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"bf_%d", i] ofType:@"png"]]];
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}
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UIImageView *butterflyView = [[UIImageView alloc] initWithFrame:CGRectMake(40.0f, 300.0f, 60.0f, 60.0f)];
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butterflyView.tag = 300;
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//设置动画的图片
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butterflyView.animationImages = bflies;
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//设置时间
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butterflyView.animationDuration = 0.75f;
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[self.view addSubview:butterflyView];
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//开始动画
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[butterflyView startAnimating];
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[butterflyView release];
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