// // ViewController.m // appXX-微信更多工具欄 // // Created by MRBean on 15/7/27. // Copyright (c) 2015年 yangbin. All rights reserved. //  #import "ViewController.h" #define kScreenWidth self.view.bounds.size.width @interface ViewController () @property(strong,nonatomic)UIImageView *imageView; @end @implementation ViewController- (void)viewDidLoad {  [super viewDidLoad];  //初始化ImageView   UIImage *image = [UIImage imageNamed:@"More"];   NSLog(@"%f ,%f",image.size.width,image.size.height);   UIImage *stretchImage = [image resizableImageWithCapInsets:UIEdgeInsetsMake(31, 36, 30, 33)];//拉伸圖片   _imageView = [[UIImageView alloc]init];   _imageView.frame = CGRectMake(kScreenWidth-100, 64, 100, 150);   _imageView.image = stretchImage; //仿射變換,矩陣變換  CGAffineTransform smaller = CGAffineTransformMakeScale(0.01, 0.01);//比例縮放  CGAffineTransform rightUpMove = CGAffineTransformMakeTranslation(_imageView.frame.size.width/2, -_imageView.frame.size.height/2);//平移  CGAffineTransform cat = CGAffineTransformConcat(smaller, rightUpMove);//合并兩個矩陣變換  _imageView.transform = cat;//設置_imageView的仿射變換 _imageView.alpha = 0;//透明度 [self.view addSubview:_imageView]; _imageView.hidden = YES; self.navigationController.navigationBar.barStyle = UIBarStyleBlack;//設置navigationBar的樣式 self.navigationController.navigationBar.tintColor = [UIColor whiteColor];//設置navigationBar字體或者鏤空圖的顏色 }//點擊右側的按鈕- (IBAction)tapAdd:(UIBarButtonItem *)sender {   if (_imageView.hidden)   {     CGAffineTransform larger = CGAffineTransformMakeScale(1, 1);//放大     _imageView.hidden = NO;//顯示視圖     [UIView animateWithDuration:0.2 animations:^{       _imageView.transform = larger;       _imageView.alpha = 1;            }];   }   else   {     CGAffineTransform smaller = CGAffineTransformMakeScale(0.01, 0.01);//縮小     CGAffineTransform rightUpMove = CGAffineTransformMakeTranslation(_imageView.frame.size.width/2, -_imageView.frame.size.height/2);//移動     CGAffineTransform cat = CGAffineTransformConcat(smaller, rightUpMove);//合并transform     [UIView animateWithDuration:0.2 animations:^{       _imageView.transform = cat;       } completion:^(BOOL finished) {       _imageView.hidden = YES;       _imageView.alpha = 0;            }];   }  } - (void)didReceiveMemoryWarning {   [super didReceiveMemoryWarning];   // Dispose of any resources that can be recreated. } @end