#import "ViewController.h"
@interface ViewController ()
@property(nonatomic,strong)CALayer *calayer;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *btn =[UIButton buttonWithType:UIButtonTypeSystem];
btn.frame=CGRectMake(100, 100, 100, 50) ;
btn.tag=1;
[btn setTitle:@"隐式事务按钮" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[btn setTintColor:[UIColor blackColor]];
[btn addTarget:self action:@selector(btnclick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
UIButton *btn1 =[UIButton buttonWithType:UIButtonTypeSystem];
btn1.frame=CGRectMake(200, 100, 100, 50) ;
btn1.tag=2;
[btn1 setTitle:@"显式事务按钮" forState:UIControlStateNormal];
[btn1 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[btn1 setTintColor:[UIColor blackColor]];
[btn1 addTarget:self action:@selector(btnclick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn1];
// CATransaction 事务类,可以对多个layer的属性同时进行修改.它分隐式事务,和显式事务.
// 区分隐式动画和隐式事务:隐式动画通过隐式事务实现动画 。修改Calayer的属性属于隐式事务
// 区分显式动画和显式事务:显式动画有多种实现方式,显式事务是一种实现显式动画的方式。
//隐式事务
self.calayer=[CALayer layer];
self.calayer.bounds=CGRectMake(150, 150, 100, 100);
self.calayer.position=CGPointMake(100, 200);
self.calayer.backgroundColor=[UIColor redColor].CGColor;
self.calayer.borderColor = [UIColor blackColor].CGColor;
self.calayer.opacity = 1.0f;
[self.view.layer addSublayer:self.calayer];
[super viewDidLoad];
}
-(void)btnclick:(id)sender
{
UIButton *btn=(UIButton *)sender;
if (btn.tag==1) {
[CATransaction setDisableActions:YES];
self.calayer.cornerRadius = (self.calayer.cornerRadius == 0.0f) ? 30.0f : 0.0f;
self.calayer.opacity = (self.calayer.opacity == 1.0f) ? 0.5f : 1.0f;
}
else
{
//事务嵌套
[CATransaction begin];
[CATransaction begin];
[CATransaction setDisableActions:YES];
self.calayer.opacity = (self.calayer.opacity == 1.0f) ? 0.5f : 1.0f;
[CATransaction commit];
//上面的动画并不会立即执行,需要等最外层的commit
[NSThread sleepForTimeInterval:3];
//显式事务默认开启动画效果,kCFBooleanTrue关闭
[CATransaction setValue:(id)kCFBooleanFalse
forKey:kCATransactionDisableActions];
//动画执行时间
[CATransaction setValue:[NSNumber numberWithFloat:10.0f] forKey:kCATransactionAnimationDuration];
//[CATransaction setAnimationDuration:[NSNumber numberWithFloat:5.0f]];
self.calayer.cornerRadius = (self.calayer.cornerRadius == 0.0f) ? 30.0f : 0.0f;
[CATransaction commit];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end