Question

我有一个名为logoview的UIView。

[logoview setCenter:CGPointMake(100,100)];
    [UIView animateWithDuration:4
                          delay:1
                        options: (UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
                     animations:^{
                         [logoview setCenter:CGPointMake(0, 3232)];


                     }
                     completion:^(BOOL finished) {
                     }];

我正在尝试使用上面的代码为它设置动画。它导致物体每次从顶部角落移动到中心。无论我在动画部分使用什么电线......我都在使用故事板。

我的最终目标是在中心显示徽标。然后像在Skype上一样提升徽标，并在facebook登录时显示登录字段。无论我为什么价值

[logoview setCenter:CGPointMake(0, 3232)];

它只是去了中心。

我也试过了：

[UIView animateWithDuration:4
                          delay:1
                        options: (UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
                     animations:^{
                         [logoview setTransform: CGAffineTransformMakeTranslation(0, -80)];


                     }
                     completion:^(BOOL finished) {
                     }];

它可以解除徽标视图，但它也可以将它略微偏移......让它偏离中心。

整个.m

//
//  ViewController.m
//  Couple
//
//  Created by Michael Latman on 4/1/13.
//  Copyright (c) 2013 Michael Latman. All rights reserved.
//

#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    //Rounded corners!
    self.view.layer.cornerRadius = 10;
    self.view.layer.masksToBounds = YES;
    //lol.layer.cornerRadius = 90;
    //lol.layer.masksToBounds = YES;
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //[logoview setCenter:CGPointMake(100,100)];
    [UIView animateWithDuration:4
                          delay:1
                        options: (UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
                     animations:^{

                         [logoview setCenter:CGPointMake(0, 1)];


                     }
                     completion:^(BOOL finished) {
                     }];


}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

Answer 1

嗯，有一个问题是viewDidLoad太快了。你想要等到至少viewDidAppear。您的界面尚未在viewDidLoad中获得实际尺寸。所有发生的事情是你的视图控制器有一个视图;视图尚未在界面中显示，更不用说对用户可见了。

Answer 2

这样的东西？

[UIView animateWithDuration:4.0 delay:1.0 options:(UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction) animations:^{
    [logoview setCenter:CGPointMake(logoview.center.x, logoview.center.y - 80.0)];
} completion:nil];

UIView animateWithDuration每次都会产生相同的位置

2 个答案: