复制/剪切/粘贴屏幕中的图片

 1 @implementation prjCopyAndPaste
 2 
 3 -(void)viewDidLoad
 4 {
 5     [super viewDidLoad];
 6 }
 7 
 8 -(void)viewWillAppear:(BOOL)animated
 9 {
10     [super viewWillAppear:animated];
11     self.view.backgroundColor = [UIColor whiteColor];
12     
13     [self setupImageWithName:@"img_01" center:self.view.center];
14     [self setupImageWithName:@"img_02" center:CGPointMake(200, 300)];
15     [self setupImageWithName:@"img_03" center:CGPointMake(50, 80)];
16 }
17 
18 -(void)setupImageWithName:(NSString *)imageNamed center:(CGPoint)point
19 {
20     UIImageView *bug = [[UIImageView alloc]initWithImage:[UIImage imageNamed:imageNamed]];
21     bug.center = point;
22     [self.view addSubview:bug];
23 }
24 //成为第一响应者显示编辑菜单
25 -(BOOL)canBecomeFirstResponder
26 {
27     return YES;
28 }
29 
30 -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
31 {
32     UITouch *touch = [touches anyObject];
33     //连续两次触碰显示菜单
34     if ([self becomeFirstResponder] && 1 < [touch tapCount]) {
35         UIMenuController *menu = [UIMenuController sharedMenuController];
36         self.touchPoint = [touch locationInView:self.view];
37         CGRect minRect;
38         minRect.origin = self.touchPoint;
39         [menu setTargetRect:minRect inView:self.view];
40         [menu setMenuVisible:YES animated:YES];
41     }
42 }
43 
44 -(BOOL)canPerformAction:(SEL)action withSender:(id)sender
45 {
46     if (@selector(copy:) == action) {
47         if ([self imageContainsPoint:self.touchPoint]) {
48             return YES;
49         }
50     }else if(@selector(cut:) == action){
51         if ([self imageContainsPoint:self.touchPoint]) {
52             return YES;
53         }
54     }else if(@selector(paste:) == action){
55         return (nil != [UIPasteboard generalPasteboard].image);
56     }
57     return NO;
58 }
59 
60 -(UIImageView *)imageContainsPoint:(CGPoint)point
61 {
62     for (UIView *view in self.view.subviews) {
63         if (CGRectContainsPoint(view.frame, point)) {
64             if ([view isKindOfClass:[UIImageView class]]) {
65                 return (UIImageView *)view;
66             }
67         }
68     }
69     return nil;
70 }
71 -(void)copy:(id)sender
72 {
73     UIImageView *imageView = [self imageContainsPoint:self.touchPoint];
74     if (imageView) {
75         [UIPasteboard generalPasteboard].image = imageView.image;
76     }
77 }
78 -(void)cut:(id)sender
79 {
80     UIImageView *imageView = [self imageContainsPoint:self.touchPoint];
81     if (imageView) {
82         [imageView removeFromSuperview];
83     }
84 }
85 -(void)paste:(id)sender
86 {
87     UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
88     if (pasteboard.image) {
89         UIImageView *bug = [[UIImageView alloc] initWithImage:pasteboard.image];
90         bug.center = self.touchPoint;
91         [self.view addSubview:bug];
92         pasteboard.image = bug.image;
93     }
94 }
95 
96 
97 @end