<pre><code>
import "ViewController.h"
define UI_WIDTH 80
define UI_HEIGHT 30
@interface ViewController ()<UIGestureRecognizerDelegate>
@property(nonatomic,strong)UILabel *label;
@property(nonatomic,strong)UIView *snapView;
@end
@implementation ViewController
-
(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self setUI];
}
-(void)setUI{
self.label = [[UILabel alloc]initWithFrame:CGRectMake(100, 200, UI_WIDTH, UI_HEIGHT)];
[self.view addSubview:self.label];
self.label.text = @"长按";
self.label.textAlignment = NSTextAlignmentCenter;
self.label.layer.borderWidth = 1;
self.label.layer.borderColor = [UIColor blackColor].CGColor;
//用户响应
self.label.userInteractionEnabled = YES;
//为label添加一个长按手势
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressGest:)];
longPress.delegate = self;
[self.label addGestureRecognizer:longPress];
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(longPressGest:)];
pan.delegate = self;
[self.label addGestureRecognizer:pan];
}
-(void)longPressGest:(UIGestureRecognizer *)gesTure{
NSLog(@"gesTure = %zd",gesTure.state);
//记录上一次手势的位置
static CGPoint startPoint;
//触发长按手势的label
self.label = (UILabel *)gesTure.view;
if (gesTure.state == UIGestureRecognizerStateBegan) {
//长按
//获取label截图
self.snapView = [self.label snapshotViewAfterScreenUpdates:YES];
self.snapView.center = self.label.center;
[self.view addSubview:self.snapView];
startPoint = [gesTure locationInView:self.label];
}else if(gesTure.state == UIGestureRecognizerStateChanged){
//移动
CGFloat tranX = [gesTure locationOfTouch:0 inView:self.view].x - startPoint.x;
CGFloat tranY = [gesTure locationOfTouch:0 inView:self.view].y - startPoint.y;
//设置截图视图位置
self.snapView.frame = CGRectMake(tranX, tranY, UI_WIDTH, UI_HEIGHT);
}else if (gesTure.state == UIGestureRecognizerStateEnded){
//停止
}
}
@end
