在用UIImageView播放一组png图片时发现UIimageView提供的方法并没有动画开始和结束的状态,觉得很不方便,研究了一下写了一个类来解决,菜鸟一枚希望大家别喷...
@interface CXImagesAnimationManage : NSObject
//初始化
+ (nullable instancetype)manager;
/**
播放一组图片,并获得播放状态
@param t 执行时间 默认2s
@param count 重复次数 默认1s
@param images 图片组
@param view 播放图片的视图
@param start 开始
@param stop 停止
*/
- (void)startAnimationWithDuration:(NSTimeInterval)t
withRepeatCount:(NSInteger)count
withImages:(nonnull NSArray<UIImage*> *)images
withAnimationView:(nonnull UIView *)view
withStartBlock:(nullable void(^)(void))start
withStopBlock:(nullable void(^)(void))stop;
static NSString *kKeyPath = @"contents";
static NSTimeInterval defaultTime = 1; //默认时间
static NSTimeInterval defaultCount = 1; //默认执行次数
typedef void(^AnimationBlock)();
@interface CXImagesAnimationManage() <CAAnimationDelegate>
@property (nonatomic, copy) AnimationBlock startBlock;
@property (nonatomic, copy) AnimationBlock stopBlock;
@property (nonatomic, copy) CAKeyframeAnimation *anim;
@end
@implementation CXImagesAnimationManage
+ (instancetype)manager {
static CXImagesAnimationManage *instance = nil;
static dispatch_once_t t;
dispatch_once(&t, ^{
instance = [[CXImagesAnimationManage alloc] init];
});
return instance;
}
- (void)startAnimationWithDuration:(NSTimeInterval)t
withRepeatCount:(NSInteger)count
withImages:(NSArray<UIImage *> *)images
withAnimationView:(UIView *)view
withStartBlock:(void (^)(void))start
withStopBlock:(void (^)(void))stop {
NSMutableArray *imagesArr = [NSMutableArray array];
for (UIImage *img in images) {
[imagesArr addObject:(__bridge UIImage *)img.CGImage];
}
_startBlock = start;
_stopBlock = stop;
//设置动画属性
self.anim.duration = t;
self.anim.values = imagesArr;
self.anim.repeatCount = count;
[view.layer addAnimation:self.anim forKey:kKeyPath];
}
- (CAKeyframeAnimation *)anim {
if (!_anim) {
_anim = [CAKeyframeAnimation animation];
_anim.keyPath = kKeyPath;
_anim.duration = defaultTime;
_anim.delegate = self;
_anim.repeatCount = defaultCount;
}
return _anim;
}
#pragma mark CAAnimtion Delegate Mothod
- (void)animationDidStart:(CAAnimation *)anim {
if (_startBlock != nil && _startBlock != NULL) {
_startBlock();
}
}
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
//动画结束重置属性
_anim.duration = defaultTime;
_anim.repeatCount = defaultCount;
_anim.values = nil;
if (_stopBlock != nil && _stopBlock != NULL) {
_stopBlock();
}
}
[[CXImagesAnimationManage manager] startAnimationWithDuration:0.75 withRepeatCount:1 withImages:_imagesArr withAnimationView:_imageView withStartBlock:^{
NSLog(@"动画开始");
} withStopBlock:^{
NSLog(@"动画结束");
}];
