OC 顏色漸變動畫和動畫組
阿新 • • 發佈：2019-08-01
#define RGBCOLOR(r,g,b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]
#import "ViewController.h"
@interface ViewController (){
UIView * _v;
NSNumber * _from;
NSNumber * _to;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_v = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
_v.backgroundColor = [UIColor redColor];
[self.view addSubview:_v];
UIButton * btn = [[UIButton alloc] initWithFrame:CGRectMake(100, 300, 80, 40)];
[btn setTitleColor:[UIColor blueColor] forState:(UIControlStateNormal)];
[btn setTitle:@"開始" forState:(UIControlStateNormal)];
[btn addTarget:self action:@selector(beginBtn:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:btn];
UIButton * btn2 = [[UIButton alloc] initWithFrame:CGRectMake(200, 300, 80, 40)];
[btn2 setTitleColor:[UIColor blueColor] forState:(UIControlStateNormal)];
[btn2 setTitle:@"結束" forState:(UIControlStateNormal)];
[btn2 addTarget:self action:@selector(beginBtn:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:btn2];
_from = 0;
_to = [NSNumber numberWithFloat:M_PI_4];
}
- (void)beginBtn:(UIButton *)sender{
[self animations:sender from:_from to:_to];
}
-(void)animations:(UIButton *)sender from:(NSNumber *)from to:(NSNumber *)to{
CABasicAnimation * ani = [CABasicAnimation animationWithKeyPath:@"backgroundColor"];
CABasicAnimation * ani2 = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
if ([sender.currentTitle isEqualToString:@"開始"]) {
ani.fromValue = (__bridge id _Nullable)(([UIColor redColor].CGColor));
ani.toValue = (__bridge id _Nullable)([UIColor greenColor].CGColor);
ani2.fromValue = from;
ani2.toValue = to;
}else{
ani.fromValue = (__bridge id _Nullable)([UIColor greenColor].CGColor);
ani.toValue = (__bridge id _Nullable)([UIColor redColor].CGColor);
ani2.fromValue = to;
ani2.toValue = from;
}
CAAnimationGroup * groupAni = [[CAAnimationGroup alloc] init];
groupAni.animations = @[ani,ani2];
groupAni.fillMode = kCAFillModeForwards;
groupAni.removedOnCompletion = false;
groupAni.duration = 1;
[_v.layer addAnimation:groupAni forKey:@"backgroundColor"];
}
@end