遗忘的一些知识点

最新推荐文章于 2025-03-23 23:23:18 发布

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最新推荐文章于 2025-03-23 23:23:18 发布

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分类专栏： iOS

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本文介绍了如何使用Objective-C实现图片的拉伸显示、通过手势识别器处理滑动操作以及利用UINavigationController进行视图控制器的展示与切换。这些技术点对于iOS应用的交互设计至关重要。

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1，设置图片内容拉伸

stretchableImageWithLeftCapWidth

+ (instancetype)imageWithStretchableName:(NSString *)imageName
{
    UIImage *image = [UIImage imageNamed:imageName];
    return [image stretchableImageWithLeftCapWidth:image.size.width * 0.5 topCapHeight:image.size.height * 0.5];
}

2.UINavigationController

#pragma mark -当点击tabBar上得plus 按钮的时候调用
- (void)tabbarDidClickPlusButton:(GWTabBar *)tabBar
{
    GWCompose *composeVc = [[GWCompose alloc]init];
    
    GWNavigationController *nav = [[GWNavigationController alloc]initWithRootViewController:composeVc];
    [self presentViewController:nav animated:YES completion:nil];
}

-(void)btnClick
{
    
//    _isani = !_isani;
    
    [self setUpAnimation];
    
    [self dismissViewControllerAnimated:YES completion:nil];
    
}

3.滑动手势 UISwipeGestureRecongnizer

- (void)touchMove
{
    UISwipeGestureRecognizer *move = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(move)];
    move.direction = UISwipeGestureRecognizerDirectionRight;
    [self.view addGestureRecognizer:move];
}


- (void)move
{
    
    if (_isani) {
        [self animitonWithMiddle];
    }
}

typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) {
    UISwipeGestureRecognizerDirectionRight = 1 << 0,
    UISwipeGestureRecognizerDirectionLeft  = 1 << 1,
    UISwipeGestureRecognizerDirectionUp    = 1 << 2,
    UISwipeGestureRecognizerDirectionDown  = 1 << 3
};