转场动画的学习
一、思路
. a跳转b
- a: a可以什么都不用做，直接present，
- b: b要在init方法里面 写这两个方法，
这个方法保证fromView才不会被移除(及可以在modal后看到a控制器的view)
self.modalPresentationStyle = UIModalPresentationCustom;
这个属性表示在modal、dismiss的时候会走自定义的方法
self.transitioningDelegate = self.animatr;
二、Animatr 方法 && 属性
1. 构造方法
.*这里需要注意,要给定modalPresentationStyle,否则会有坑：请看后面的"坑1"
/**
* modalPresentationStyle toVC中设置的转场动画的样式
*/
+(instancetype)animatrWithModalPresentationStyle: (UIModalPresentationStyle)modalPresentationStyle;
/**
* modalPresentationStyle toVC中设置的转场动画的样式
*/
-(instancetype)initWithModalPresentationStyle: (UIModalPresentationStyle)modalPresentationStyle;
. *dismiss & present 动画具体回调方法
//MARK: ---------------------- dismiss & present ------------------------
/**dismiss动画*/
-(void)dismissAnimaWithBlock: (void(^)(UIViewController *toVC, UIViewController *fromeVC, UIView *toView, UIView *fromeView))dismissAnimaBlock;
/**present动画*/
-(void)presentAnimaWithBlock: (void(^)(UIViewController *toVC, UIViewController *fromeVC, UIView *toView, UIView *fromeView))presentAnimaBlock;
. *容器视图的view，可以用作遮罩，修改ContainerView的方法
//MARK: ---------------------- setupContainerView ------------------------
-(void)setupContainerViewWithBlock: (void(^)(UIView *containerView))setupContainerViewBlock;
2. 属性
/**这是属性一定要设置，否则看 上面解释的“坑1”*/
@property (nonatomic,assign) UIModalPresentationStyle modalPresentationStyle;
//MARK: -------------------- 动画时长 和类型 ------------------------
/** present动画时长*/
@property (nonatomic,assign) CGFloat presentDuration;
/** dismiss动画时长*/
@property (nonatomic,assign) CGFloat dismissDuration;
/**动画是否完成，在动画完成时候，一定要把这个属性改为YES*/
@property (nonatomic,assign) BOOL isAccomplishAnima;
三、具体实现
注意 ： 一切都在toVC中设置
- 设置属性(类延展中相对私有属性)
@interface PushViewController ()
@property (nonatomic,strong) Animatr *animatr;
@end
- 在懒加载中或者
viewDidLoad中设置相关属性和实现相关方法
-(void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor blueColor];
[self setupAnimatr];//设置Animatr
}
//设置Animatr
-(void)setupAnimatr {
//dismiss动画预估时长
_animatr.dismissDuration = 4;
//present动画预估时长
_animatr.presentDuration = 5;
//dismiss转场动画
[_animatr dismissAnimaWithBlock:^(UIViewController *toVC, UIViewController *fromeVC, UIView *toView, UIView *fromeView) {
NSLog(@"dismiss开始");
[UIView animateWithDuration:_animatr.dismissDuration animations:^{
fromeView.frame = CGRectMake(0, 0, 100, 100);
} completion:^(BOOL finished) {
//在完成动画的时候一定要把这个属性设置成YES 告诉系统动画完成
_animatr.isAccomplishAnima = YES;
}];
}];
//present转场动画
[_animatr presentAnimaWithBlock:^(UIViewController *toVC, UIViewController *fromeVC, UIView *toView, UIView *fromeView) {
[UIView animateWithDuration:_animatr.presentDuration animations:^{
toView.frame = CGRectMake(0,300, 300, 300);
} completion:^(BOOL finished) {
//在完成动画的时候一定要把这个属性设置成YES 告诉系统动画完成
_animatr.isAccomplishAnima = YES;
}];
}];
//容器视图，装有toView和fromeView，可以作为遮罩
[_animatr setupContainerViewWithBlock:^(UIView *containerView) {
containerView.backgroundColor = [UIColor colorWithWhite:0.8 alpha:0.8];
}];
}
四、github地址OC版转场动画工具类
