IOS-DEMO2 SliderToDeleteDemo-优快云博客

本文详细介绍了如何在Android项目中实现自定义滑动删除功能，包括使用Pan手势识别来控制滑动删除操作，以及如何优化用户体验。通过实例代码展示了如何通过设置手势识别的delegate来精确控制何时捕获手势，以及实现滑动删除的具体步骤。

描述：项目中android用到的滑动删除。网上没找到类似就自己做了一个。

效果图：

思路：
思路1.每个cell里面加一个scrollView 这个可能消耗太大没尝试。
思路2.给cell中添加pan手势

完成中遇到的问题与长进：
1.复习了block与table那套轻量级的绑定但是发现具体问题出现时需要修改的还是不少。
2.可以通过设置gesture的delegate可以控制什么时候捕获手势。如ex1

ex1:
- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer{


    if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
        CGPoint velocityPoint = [gestureRecognizer velocityInView:self];
        if (fabsf(velocityPoint.x) > 100.0) {
            return YES;
        }else
            return NO;
    }else
        return NO;

}

//
// PLLSilderToDelete.m
// SliderToDeleteDemo
//
// Created by liu poolo on 14-7-29.
// Copyright (c) 2014年 liu poolo. All rights reserved.
//

#import "PLLSilderToDelete.h"

@implementation PLLSilderToDelete(cell_sliderDeleSetValuePro)
- (void)configureForPLSetValueProtocol:(id<PLLSliderDeleteSetValuePro>) p{

    self.hideLabel.text=[p backgroundStr];
    self.topLabel.text=[p topLabelStr];
    self.cellView.backgroundColor=[p color];

}

@end
@interface PLLSilderToDelete(){
    CGPoint defalutCenter;
}

@end

@implementation PLLSilderToDelete

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        [[NSBundle mainBundle]loadNibNamed:@"sliderDemo" owner:self options:nil];
        [self.contentView addSubview:self.cellView];
        UIPanGestureRecognizer* pan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePan:)];
        pan.delegate=self;
        [self.topContentView addGestureRecognizer:pan];
    }
    return self;
}

- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer{

    if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
        CGPoint velocityPoint = [gestureRecognizer velocityInView:self];
        if (fabsf(velocityPoint.x) > 100.0) {
            return YES;
        }else
            return NO;
    }else
        return NO;

}

-(void)handlePan:(UIPanGestureRecognizer*)gesture{
    NSLog(@"%@",    self.hideLabel);
    if(gesture.state==UIGestureRecognizerStateBegan){
        NSLog(@"begin");
        defalutCenter=self.topContentView.center;
    }else if(gesture.state==UIGestureRecognizerStateChanged){

        CGPoint translation=[gesture translationInView:gesture.view.superview];
        if(translation.x<0){
            self.topContentView.center=CGPointMake(defalutCenter.x+translation.x, defalutCenter.y);
            float alpha=1.0-(translation.x/self.cellView.frame.size.width);
            self.topContentView.alpha=alpha;
        }

    }else if(gesture.state==UIGestureRecognizerStateEnded){
        CGPoint translation=[gesture translationInView:gesture.view.superview];
        if (translation.x<-50) {
            [UIView animateWithDuration:0.3 animations:^{
                self.topContentView.frame=CGRectMake(-self.topContentView.frame.size.width, self.topContentView.frame.origin.y,self.topContentView.frame.size.width, self.topContentView.frame.size.height);
            } completion:^(BOOL finished) {
                [self.delegate silderDoWithIndex:self.contentView.tag];
                self.topContentView.frame=CGRectMake(0, self.topContentView.frame.origin.y,self.topContentView.frame.size.width, self.topContentView.frame.size.height);
                self.topContentView.alpha=1.0f;
            }];
        }else if(gesture.state==UIGestureRecognizerStateEnded){
            [UIView animateWithDuration:0.3 animations:^{
                self.topContentView.frame=CGRectMake(0, self.topContentView.frame.origin.y,self.topContentView.frame.size.width, self.topContentView.frame.size.height);
                self.topContentView.alpha=1.0f;
            } completion:nil];
        }
    }
}

- (void)awakeFromNib
{
    // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end