我遇到了iOS 8中存在的CGAffineTransformConcat问题，但iOS 7中没有。使用带缩放和翻译的串联动画UIView会导致位置跳转。在iOS 7中运行相同的代码，可以获得所需的结果。是否存在导致此问题的变化？
这是我的示例代码......
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//add a view
self.lilView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
self.lilView.backgroundColor = [UIColor greenColor];
[self.view addSubview:self.lilView];
//add a tap gesture
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(poop:)];
[self.view addGestureRecognizer:tap];
}
-(void) poop:(UITapGestureRecognizer*) gesture {
if (!self.pooped) {
[UIView animateWithDuration:1 delay:0 options:0 animations:^{
self.lilView.transform = CGAffineTransformConcat(CGAffineTransformMakeScale(2.0, 2.0), CGAffineTransformMakeTranslation(200, 300));
self.pooped = YES;
} completion:nil];
} else {
[UIView animateWithDuration:1 delay:0 options:0 animations:^{
self.lilView.transform = CGAffineTransformConcat(CGAffineTransformMakeScale(1.5, 1.5), CGAffineTransformMakeTranslation(100, 200));
self.pooped = NO;
} completion:nil];
}
}
感谢您的帮助！