Question

我用来为UITextField制作动画的代码对我有用，直到XCode版本6.0（6A215l）。现在XCode6 Beta7没有重新定位UITextField。我该怎么做才能让它发挥作用？代码如下：

@interface TableConfigViewController ()
@property(nonatomic, strong) IBOutlet UITextField                   *customTableName;
@end

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.customTableName setDelegate:self];
}
- (void)animateTextField:(UITextField*)textField
                      up:(BOOL)up
{
    const float movementDuration = 0.5f;
    const int movementDistance = 380;
    int movement = (up ? -movementDistance : movementDistance);
    [UIView beginAnimations: @"animation" context:nil];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:movementDuration];
    self.customTableName.frame = CGRectOffset(self.customTableName.frame, 0, movement);
    [UIView commitAnimations];
}

- (void)textFieldDidBeginEditing:(UITextField*)textField
{
    [self animateTextField:textField up:YES];
}

- (void)textFieldDidEndEditing:(UITextField*)textField
{
    [self animateTextField:textField up:NO];
}

非常感谢您提前

Answer 1

不确定这是否是您的问题的根源，但您应该考虑使用基于块的API（自iOS 4.0开始提供）用于UIView动画。

来自Apple关于beginAnimations:context:

的文档

＆＃34;在iOS 4.0及更高版本中不鼓励使用此方法。您应该使用基于块的动画方法来指定动画。＆＃34;

例如（未经测试）：

- (void)animateTextField:(UITextField*)textField
                      up:(BOOL)up
{
    const float movementDuration = 0.5f;
    const int movementDistance = 380;
    int movement = (up ? -movementDistance : movementDistance);
    [UIView animateWithDuration:movementDuration
                     animations:
                     ^{
                         self.customTableName.frame = CGRectOffset(self.customTableName.frame, 0, movement);
                     }
    ];
}

iOS8动画代码不再起作用

1 个答案: