前言

目前项目中提出iOS默认索引，如果index个数太少，间隔太紧密。让向android靠拢。

用法

使用的是DeanKit
效果

031.gif

引入源码

ViewController_h_和_QDMessageNotifySettingTableViewController_m.png

源码简介

DSectionIndexView为索引部分

031.png

添加头文件

#import "DSectionIndexItemView.h"
#import "DSectionIndexView.h"

实现协议

索引个数

- (NSInteger)numberOfItemViewForSectionIndexView:(DSectionIndexView *)sectionIndexView
{
    return self.tableview.numberOfSections;
}

自定义索引ItemView

- (DSectionIndexItemView *)sectionIndexView:(DSectionIndexView *)sectionIndexView itemViewForSection:(NSInteger)section
{
    DSectionIndexItemView *itemView = [[DSectionIndexItemView alloc] init];
    
    itemView.titleLabel.text = [self.sections objectAtIndex:section];
    itemView.titleLabel.font = [UIFont systemFontOfSize:12];
    itemView.titleLabel.textColor = [UIColor darkGrayColor];
    itemView.titleLabel.highlightedTextColor = [UIColor redColor];
    itemView.titleLabel.shadowColor = [UIColor whiteColor];
    itemView.titleLabel.shadowOffset = CGSizeMake(0, 1);
    
    return itemView;
}

自定义callout

- (UIView *)sectionIndexView:(DSectionIndexView *)sectionIndexView calloutViewForSection:(NSInteger)section
{
    UILabel *label = [[UILabel alloc] init];
    
    label.frame = CGRectMake(0, 0, 80, 80);
    
    label.backgroundColor = [UIColor clearColor];
    label.textColor = [UIColor redColor];
    label.font = [UIFont boldSystemFontOfSize:36];
    label.text = [self.sections objectAtIndex:section];
    label.textAlignment = UITextAlignmentCenter;
    
    [label.layer setCornerRadius:label.frame.size.width/2];
    [label.layer setBorderColor:[UIColor lightGrayColor].CGColor];
    [label.layer setBorderWidth:3.0f];
    [label.layer setShadowColor:[UIColor blackColor].CGColor];
    [label.layer setShadowOpacity:0.8];
    [label.layer setShadowRadius:5.0];
    [label.layer setShadowOffset:CGSizeMake(2.0, 2.0)];

    
    return label;
}

index的title

- (NSString *)sectionIndexView:(DSectionIndexView *)sectionIndexView
               titleForSection:(NSInteger)section
{
    return [self.sections objectAtIndex:section];
}

选中某个index

- (void)sectionIndexView:(DSectionIndexView *)sectionIndexView didSelectSection:(NSInteger)section
{
    [self.tableview scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:section] atScrollPosition:UITableViewScrollPositionTop animated:YES];
}

设置frame

#define kSectionIndexWidth 40.f
#define kSectionIndexHeight 360.f
- (void)viewWillLayoutSubviews
{
    [super viewWillLayoutSubviews];
    _sectionIndexView.frame = CGRectMake(CGRectGetWidth(self.tableview.frame) - kSectionIndexWidth, (CGRectGetHeight(self.tableview.frame) - kSectionIndexHeight)/2, kSectionIndexWidth, kSectionIndexHeight);
    [_sectionIndexView setBackgroundViewFrame];
}

reload

加载完数据，需要reloadindex.

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.sectionIndexView reloadItemViews];
}

Demo

TSCustomTableViewIndexs