李二狗 — @Meniny
Table of Content
直接上代码:
// @implementation NSLayoutConstraint (Animation)
- (void)setConstant:(CGFloat)constant animatedDuration:(NSTimeInterval)duration {
__weak typeof(self) weakSelf = self;
[UIView animateWithDuration:duration animations:^{
__strong typeof(weakSelf) strongSelf = weakSelf;
[strongSelf setConstant:constant];
if ([strongSelf.firstItem isMemberOfClass:[UIView class]]) {
[((UIView *)strongSelf.firstItem) layoutIfNeeded];
}
}];
}
