ios手势识别-拖拽(Pan)
//
// MJViewController.m
// 10-拖拽(Pan)
//
// Created by apple on 14-4-20.
// Copyright (c) 2014年 itcast. All rights reserved.
//
#import "MJViewController.h"
@interface MJViewController ()
@property (weak, nonatomic) IBOutlet UIView *purpleView;
@end
@implementation MJViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panView:)];
[self.purpleView addGestureRecognizer:pan];
}
- (void)panView:(UIPanGestureRecognizer *)pan
{
switch (pan.state) {
case UIGestureRecognizerStateBegan: // 开始触发手势
break;
case UIGestureRecognizerStateEnded: // 手势结束
break;
default:
break;
}
// 1.在view上面挪动的距离
CGPoint translation = [pan translationInView:pan.view];
CGPoint center = pan.view.center;
center.x += translation.x;
center.y += translation.y;
pan.view.center = center;
// 2.清空移动的距离
[pan setTranslation:CGPointZero inView:pan.view];
}
@end
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