一个动画效果

by 伍雪颖

#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)

@interface
ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super
viewDidLoad];

UIView *view = [[UIView
alloc]
initWithFrame:CGRectMake(100,
100,
100,
100)];

view.backgroundColor = [UIColor
redColor];

[self.view
addSubview:view];

view.transform =
CGAffineTransformMakeTranslation(SCREEN_WIDTH,
0);

[UIView
animateWithDuration:0.5
delay:0
usingSpringWithDamping:0.7
initialSpringVelocity:0
options:0
animations:^{

view.transform =
CGAffineTransformIdentity;

} completion:NULL];

}