zoukankan      html  css  js  c++  java
  • ios中图片旋转

    @interface ViewController ()
    {
        UIImageView *_imageview;
        BOOL flag;
    }
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        UIButton *btn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
        btn.frame=CGRectMake(0, 200, 200, 50);
        UIImageView *imgview=[self ImageViewImageName:@"arrow_down" frame:CGRectMake(0, (50-30)*0.5f, 27, 30)];
        [btn addSubview:imgview];
        _imageview=imgview;
        [self.view addSubview:btn];
        flag=YES;
    }
    
    
    - (UIImageView *)ImageViewImageName:(NSString*)aImageName frame:(CGRect)aRect{
        UIImageView *imageView = [[[UIImageView alloc] initWithFrame:aRect] autorelease];
        imageView.userInteractionEnabled = YES;
        UIImage *aImage = [UIImage imageNamed:(aImageName)];
        if ([aImage respondsToSelector:@selector(resizableImageWithCapInsets:)]) {
            imageView.image = [aImage resizableImageWithCapInsets:UIEdgeInsetsMake(aImage.size.height/2, aImage.size.width/2, aImage.size.height/2, aImage.size.width/2)];
        } else {
            imageView.image = [aImage stretchableImageWithLeftCapWidth:aImage.size.width/2 topCapHeight:aImage.size.height/2];
        }
        return imageView;
    }
    
    
    
    - (IBAction)click:(id)sender {
       
        if (flag) {
            _imageview.transform=CGAffineTransformMakeRotation(M_PI*2);
            flag=NO;
        }
        else{
            _imageview.transform=CGAffineTransformMakeRotation(M_PI*3.5);
            flag=YES;
        }
        
    }
    @end
  • 相关阅读:
    C# 图片与Base64的相互转化
    LeetCode 303. Range Sum Query – Immutable
    LeetCode 300. Longest Increasing Subsequence
    LeetCode 292. Nim Game
    LeetCode 283. Move Zeroes
    LeetCode 279. Perfect Squares
    LeetCode 268. Missing Number
    LeetCode 264. Ugly Number II
    LeetCode 258. Add Digits
    LeetCode 257. Binary Tree Paths
  • 原文地址:https://www.cnblogs.com/gcb999/p/3284147.html
Copyright © 2011-2022 走看看