● UIKit直接将动画集成到UIView类中,当内部的一些属性发生改变时,UIView 将为这些改变提供动画支持
● 执行动画所需要的工作由UIView类自动完成,但仍要在希望执行动画时通知视 图,为此需要将改变属性的代码放在[UIView beginAnimations:nil context:nil]和 [UIView commitAnimations]之间
● 常见方法解析:
● + (void)setAnimationDelegate:(id)delegate 设置动画代理对象,当动画开始或者结束时会发消息给代理对象
● + (void)setAnimationWillStartSelector:(SEL)selector 当动画即将开始时,执行delegate对象的selector,并且把beginAnimations:context:中 传入的参数传进selector
● + (void)setAnimationDidStopSelector:(SEL)selector 当动画结束时,执行delegate对象的selector,并且把beginAnimations:context:中传入 的参数传进selector
● + (void)setAnimationDuration:(NSTimeInterval)duration 动画的持续时间,秒为单位
● + (void)setAnimationDelay:(NSTimeInterval)delay 动画延迟delay秒后再开始
● + (void)setAnimationStartDate:(NSDate *)startDate 动画的开始时间,默认为now
● + (void)setAnimationCurve:(UIViewAnimationCurve)curve 动画的节奏控制,具体看下面的”备注”
● + (void)setAnimationRepeatCount:(float)repeatCount 动画的重复次数
● + (void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses 如果设置为YES,代表动画每次重复执行的效果会跟上一次相反
● + (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache 设置视图view的过渡效果, transition指定过渡类型, cache设置YES代表使用视 图缓存,性能较好
#import "NJViewController.h"@interface NJViewController ()@property (weak, nonatomic) IBOutlet UIView *cutomView;@end@implementation NJViewController- (void)viewDidLoad{ [super viewDidLoad];}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ [UIView transitionWithView:self.view duration:1.0 options:0 animations:^{ NSLog(@"animations"); // 要执行的动画 [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES]; } completion:^(BOOL finished) { NSLog(@"completion"); // 执行完毕之后执行的动画 }];}- (void)test2{ [UIView animateWithDuration:2.0 animations:^{ NSLog(@"动画执行之前: %@",NSStringFromCGPoint(self.cutomView.center)); // 需要执行动画的代码 self.cutomView.center = CGPointMake(300, 300); } completion:^(BOOL finished) { // 动画执行完毕之后执行的代码 NSLog(@"动画执行之后: %@",NSStringFromCGPoint(self.cutomView.center)); }];}- (void)test1{ // 1.创建核心动画 // 注意点:如果通过核心动画改变layer的位置状态, 表面上看上去已经改变了, 但是实质上是没有改变的 CABasicAnimation *anima = [CABasicAnimation animation]; anima.keyPath = @"position"; anima.toValue = [NSValue valueWithCGPoint:CGPointMake(300, 300)]; anima.removedOnCompletion = NO; anima.fillMode = kCAFillModeForwards; anima.delegate = self; // 2.添加核心动画 [self.cutomView.layer addAnimation:anima forKey:nil];}- (void)animationDidStart:(CAAnimation *)anim{ NSLog(@"核心动画执行之前 %@", NSStringFromCGPoint(self.cutomView.layer.position));}- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{ NSLog(@"核心动画执行完毕 %@", NSStringFromCGPoint(self.cutomView.layer.position));}- (void)test{ // 1.UIVIEW封装的动画, 动画执行完毕之后不会反弹 NSLog(@"动画执行之前: %@",NSStringFromCGPoint(self.cutomView.center)); [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:2.0]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(didStopAnimatino)]; self.cutomView.center = CGPointMake(300, 300); [UIView commitAnimations]; }- (void)didStopAnimatino{ NSLog(@"动画执行完毕 %@", NSStringFromCGPoint(self.cutomView.center));}@end