使用CABasicAnimation實現的動畫效果（一）
這個動畫採用了CABasicAnimation和CAAnimationGroup來實現的，改變位置、改變大小、按鈕圓角數合在一起形成一個組合動畫。
原來是準備在CABasicAnimation中通過begintime來設定延時的效果，但效果不理想。
程式碼部分：
自定義按鈕
@interface MyButton : UIButton
@property (assign,nonatomic) BOOL isChange; /*!< 是否變化 */
@end
#import "MyButton.h"
@implementation MyButton
-(instancetype
self = [super initWithFrame:frame];
if (self) {
self.layer.cornerRadius = frame.size.width / 2;
self.backgroundColor = [UIColorlightGrayColor];
self.titleLabel.font = [UIFontsystemFontOfSize:14];
}
return self;
}
@end
#define kSmallWidth 10
#define kBigWidth 30
@interface TwoViewController ()
@property (strong,nonatomic) CAShapeLayer *shape;
@property (strong,nonatomic) UIButton *runButton;
@property (strong,nonatomic) NSMutableArray *arrayM;
@end
@implementation TwoViewController
- (void)viewDidLoad {
[superviewDidLoad];
for (NSInteger
MyButton *btn = self.arrayM[i];
[self.view addSubview:btn];
}
[self.viewaddSubview:self.runButton];
}
-(void)run{
//偏移量
CGFloat yOffSet = 50;
//延時秒數
NSTimeInterval delay = 0.1;
for (NSInteger i = 0; i < self.arrayM.count; i++) {
MyButton *btn = self.arrayM[i];
[self runAnimation:btn yOffSet:yOffSet * (i + 1) delay:delay];
delay += 0.1;
}
}
/**
* 按鈕的動畫處理
*
* @param btn 按鈕
* @param yOffSet 偏移量
* @param delay 延遲秒數（用了CAAnimationGroup中的begintime來做延時，但沒有做到想要的效果，暫時就不用了）
*/
- (void)runAnimation:(MyButton *)btn yOffSet:(CGFloat)yOffSet delay:(NSTimeInterval)delay{
btn.isChange = !btn.isChange;
//位移設定
CABasicAnimation *pAnimatiom = [CABasicAnimationanimationWithKeyPath:@"position"];
//大小改變設定
CABasicAnimation *bAnimation = [CABasicAnimationanimationWithKeyPath:@"bounds"];
//按鈕圓角數設定
CABasicAnimation *cAnimation = [CABasicAnimationanimationWithKeyPath:@"cornerRadius"];
//組合動畫
CAAnimationGroup *group = [CAAnimationGroupanimation];
if (btn.isChange) {
//位移設定
pAnimatiom.fromValue = [NSValuevalueWithCGPoint:btn.layer.position];
pAnimatiom.toValue = [NSValuevalueWithCGPoint:CGPointMake(btn.layer.position.x, btn.layer.position.y - yOffSet)];
//大小改變設定
bAnimation.fromValue = [NSValue valueWithCGRect:btn.bounds];
bAnimation.toValue = [NSValue valueWithCGRect:CGRectMake(0, 0, kBigWidth, kBigWidth)];
//按鈕圓角數設定
cAnimation.fromValue = [NSNumbernumberWithFloat:btn.layer.cornerRadius];
cAnimation.toValue = [NSNumbernumberWithFloat:btn.layer.bounds.size.width / 2];
//組合動畫設定
group.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionLinear];
[group setAnimations:@[pAnimatiom,bAnimation,cAnimation]];
group.duration = 0.1;
group.removedOnCompletion = NO;
//動畫完成後，設定按鈕
btn.layer.cornerRadius = kBigWidth / 2;
btn.layer.position = CGPointMake(btn.layer.position.x, btn.layer.position.y - yOffSet);
btn.bounds = CGRectMake(0, 0, kBigWidth, kBigWidth);
}
else{
//位移設定
pAnimatiom.fromValue = [NSValuevalueWithCGPoint:btn.layer.position];
pAnimatiom.toValue = [NSValuevalueWithCGPoint:self.view.center];
//大小改變設定
bAnimation.fromValue = [NSValue valueWithCGRect:btn.bounds];
bAnimation.toValue = [NSValue valueWithCGRect:CGRectMake(0, 0, kSmallWidth, kSmallWidth)];
//按鈕圓角數設定
cAnimation.fromValue = [NSNumbernumberWithFloat:btn.layer.cornerRadius];
cAnimation.toValue = [NSNumbernumberWithFloat:btn.layer.bounds.size.width / 2];
//組合動畫設定
group.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseIn];
[group setAnimations:@[pAnimatiom,bAnimation,cAnimation]];
group.duration = 0.1;
group.removedOnCompletion = NO;
//動畫完成後，設定按鈕
btn.layer.cornerRadius = kSmallWidth / 2;
btn.layer.position = self.view.center;
btn.bounds = CGRectMake(0, 0, kSmallWidth, kSmallWidth);
}
[btn.layer addAnimation:group forKey:nil];
}
-(UIButton *)runButton{
if (!_runButton) {
_runButton = [UIButtonbuttonWithType:UIButtonTypeCustom];
[_runButtonsetFrame:CGRectMake(0, 0,30, 30)];
[_runButtonsetTitle:@"按鈕"forState:UIControlStateNormal];
[_runButton.titleLabelsetFont:[UIFontsystemFontOfSize:14]];
[_runButtonsetBackgroundColor:[UIColorlightGrayColor]];
_runButton.layer.cornerRadius = _runButton.bounds.size.width / 2;
_runButton.layer.position = self.view.center;
[_runButtonaddTarget:selfaction:@selector(run) forControlEvents:UIControlEventTouchUpInside];
}
return_runButton;
}
-(NSMutableArray *)arrayM{
if (!_arrayM) {
_arrayM = [NSMutableArray array];
for (NSString *name in @[@"A",@"B",@"C",@"D",@"E"]) {
MyButton *btn = [[MyButton alloc]initWithFrame:CGRectMake(0, 0, kSmallWidth, kSmallWidth)];
[btn setTitle:name forState:UIControlStateNormal];
[btn setTitleColor:[UIColorwhiteColor] forState:UIControlStateNormal];
btn.layer.position = self.view.center;
[_arrayM addObject:btn];
}
}
return_arrayM;
}
@end