RATreeView是一个第三方的iOS树视图(通俗的讲就是折叠单元格),它是对UITableView的封装,定义自己的委托和数据源的法,RATreeView是高度可定制的,并且有很多功能。很多朋友都说使用的不好,官方讲的也不够详细,所以我就给大家讲一下,怎么使用.
- 首先先看下实现效果
1.gif
- 使用方法
CocoaPods pod 'RATreeView', '~> 2.1.0'
- 具体使用
1.创建model
#import <Foundation/Foundation.h>
@interface RaTreeModel : NSObject
@property (nonatomic,copy) NSString *name;//标题
@property (nonatomic,strong) NSArray *children;//子节点数组
//初始化一个model
- (id)initWithName:(NSString *)name children:(NSArray *)array;
//遍历构造器
+ (id)dataObjectWithName:(NSString *)name children:(NSArray *)children;
@end
#import "RaTreeModel.h"
@implementation RaTreeModel
- (id)initWithName:(NSString *)name children:(NSArray *)children
{
self = [super init];
if (self) {
self.children = children;
self.name = name;
}
return self;
}
+ (id)dataObjectWithName:(NSString *)name children:(NSArray *)children
{
return [[self alloc] initWithName:name children:children];
}
@end
2.创建cell
- 特别注意 xib创建的cell, 一定不要勾选Use Auto Layout,否则cell上的布局不会执行.
找不到的,请看下图
Snip20160525_1.png
cell创建具体如下:
这是我用xib设置的cell,你们按照你们的需求做
Snip20160525_4.png
#import <UIKit/UIKit.h>
@interface RaTreeViewCell : UITableViewCell
@property (weak, nonatomic) IBOutlet UIImageView *iconView;//图标
@property (weak, nonatomic) IBOutlet UILabel *titleLable;//标题
//赋值
- (void)setCellBasicInfoWith:(NSString *)title level:(NSInteger)level children:(NSInteger )children;
@end
#import "RaTreeViewCell.h"
@interface RaTreeViewCell ()
@end
@implementation RaTreeViewCell
- (void)awakeFromNib {
// Initialization code
self.selectionStyle = UITableViewCellSelectionStyleNone;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
- (void)setCellBasicInfoWith:(NSString *)title level:(NSInteger)level children:(NSInteger )children{
//有自孩子时显示图标
if (children==0) {
self.iconView.hidden = YES;
}
else { //否则不显示
self.iconView.hidden = NO;
}
self.titleLable.text = title;
self.iconView.image = [UIImage imageNamed:@"close"];
//每一层的布局
CGFloat left = 10+level*30;
//头像的位置
CGRect iconViewFrame = self.iconView.frame;
iconViewFrame.origin.x = left;
self.iconView.frame = iconViewFrame;
//title的位置
CGRect titleFrame = self.titleLable.frame;
titleFrame.origin.x = 40+left;
self.titleLable.frame = titleFrame;
}
3.创建RATreeView
只展示核心代码
数据
//加载数据
- (void)setData {
//宝鸡市 (四层)
RaTreeModel *zijingcun = [RaTreeModel dataObjectWithName:@"紫荆村" children:nil];
RaTreeModel *chengcunzheng = [RaTreeModel dataObjectWithName:@"陈村镇" children:@[zijingcun]];
RaTreeModel *fengxiang = [RaTreeModel dataObjectWithName:@"凤翔县" children:@[chengcunzheng]];
RaTreeModel *qishan = [RaTreeModel dataObjectWithName:@"岐山县" children:nil];
RaTreeModel *baoji = [RaTreeModel dataObjectWithName:@"宝鸡市" children:@[fengxiang,qishan]];
//西安市
RaTreeModel *yantaqu = [RaTreeModel dataObjectWithName:@"雁塔区" children:nil];
RaTreeModel *xinchengqu = [RaTreeModel dataObjectWithName:@"新城区" children:nil];
RaTreeModel *xian = [RaTreeModel dataObjectWithName:@"西安" children:@[yantaqu,xinchengqu]];
RaTreeModel *shanxi = [RaTreeModel dataObjectWithName:@"陕西" children:@[baoji,xian]];
[self.modelArray addObject:shanxi];
}
#######代理方法
#pragma mark -----------delegate
//返回行高
- (CGFloat)treeView:(RATreeView *)treeView heightForRowForItem:(id)item {
return 50;
}
//将要展开
- (void)treeView:(RATreeView *)treeView willExpandRowForItem:(id)item {
RaTreeViewCell *cell = (RaTreeViewCell *)[treeView cellForItem:item];
cell.iconView.image = [UIImage imageNamed:@"open"];
}
//将要收缩
- (void)treeView:(RATreeView *)treeView willCollapseRowForItem:(id)item {
RaTreeViewCell *cell = (RaTreeViewCell *)[treeView cellForItem:item];
cell.iconView.image = [UIImage imageNamed:@"close"];
}
//已经展开
- (void)treeView:(RATreeView *)treeView didExpandRowForItem:(id)item {
NSLog(@"已经展开了");
}
//已经收缩
- (void)treeView:(RATreeView *)treeView didCollapseRowForItem:(id)item {
NSLog(@"已经收缩了");
}
####### dataSource方法
//返回cell
- (UITableViewCell *)treeView:(RATreeView *)treeView cellForItem:(id)item {
//获取cell
RaTreeViewCell *cell = [treeView dequeueReusableCellWithIdentifier:@"RaTreeViewCell"];
//当前item
RaTreeModel *model = item;
//当前层级
NSInteger level = [treeView levelForCellForItem:item];
//赋值
[cell setCellBasicInfoWith:model.name level:level children:model.children.count];
return cell;
}
/**
* 必须实现
*
* @param treeView treeView
* @param item 节点对应的item
*
* @return 每一节点对应的个数
*/
- (NSInteger)treeView:(RATreeView *)treeView numberOfChildrenOfItem:(id)item
{
RaTreeModel *model = item;
if (item == nil) {
return self.modelArray.count;
}
return model.children.count;
}
/**
*必须实现的dataSource方法
*
* @param treeView treeView
* @param index 子节点的索引
* @param item 子节点索引对应的item
*
* @return 返回 节点对应的item
*/
- (id)treeView:(RATreeView *)treeView child:(NSInteger)index ofItem:(id)item {
RaTreeModel *model = item;
if (item==nil) {
return self.modelArray[index];
}
return model.children[index];
}
//cell的点击方法
- (void)treeView:(RATreeView *)treeView didSelectRowForItem:(id)item {
//获取当前的层
NSInteger level = [treeView levelForCellForItem:item];
//当前点击的model
RaTreeModel *model = item;
NSLog(@"点击的是第%ld层,name=%@",level,model.name);
}
//单元格是否可以编辑 默认是YES
- (BOOL)treeView:(RATreeView *)treeView canEditRowForItem:(id)item {
return YES;
}
//编辑要实现的方法
- (void)treeView:(RATreeView *)treeView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowForItem:(id)item {
NSLog(@"编辑了实现的方法");
}
4.基本能用到的方法 我都写了注释,如有错误请指出.是不是比官方的清楚的多.
