#import "RootViewController.h"
#define width 【UIScreen mainScreen】.bounds.size.width
#define height 【UIScreen mainScreen】.bounds.size.height
#define topH 64
@interface RootViewController ()
@property (nonatomic, strong) UITableView tableView;
@property (nonatomic, strong) NSMutableArray rowData;
@end
@implementation RootViewController
- (void)loadView
{
【super loadView】;
// 初始化view
UIView aView = 【【UIView alloc】 initWithFrame:CGRectMake(0, 0, width, topH)】;
aView.backgroundColor = 【UIColor grayColor】;
【self.view addSubview:aView】;
// 初始化leftButton
SEL leftSel = NSSelectorFromString(@"scrollToTop:");
UIButton leftBtn = 【self setupButtonWithTitle:@"top" withFrame:CGRectMake(0, 20, 80, topH - 20) withSelector:leftSel】;
【self.view addSubview:leftBtn】;
// 初始化rigthButton
SEL rightSel = NSSelectorFromString(@"scrollToBottom:");
UIButton rightBtn = 【self setupButtonWithTitle:@"bottom" withFrame:CGRectMake(width - 80 - 20, 20, 80, topH-20) withSelector:rightSel】;
【self.view addSubview:rightBtn】;
// 初始化_tableView
self.tableView = 【【UITableView alloc】 initWithFrame:CGRectMake(0, topH,width, height - topH) style:UITableViewStylePlain】;
self.tableView.dataSource = self;
self.tableView.delegate = self;
【self.view addSubview:self.tableView】;
}
/**
初始化Button
@param aTitle Button的标题
@param aFrame Button的框架
@param aSelector Button的方法
@return Button
/
- (UIButton )setupButtonWithTitle:(NSString )aTitle withFrame:(CGRect)aFrame withSelector:(SEL)aSelector
{
UIButton btn = 【UIButton buttonWithType:UIButtonTypeRoundedRect】;
btn.frame = aFrame;
【btn setTitle:aTitle forState:0】;
btn.titleLabel.font = 【UIFont systemFontOfSize:25】;
【btn addTarget:self action:aSelector forControlEvents:UIControlEventTouchUpInside】;
return btn;
}
- (void)viewDidLoad {
【super viewDidLoad】;
【self loadData】;
}
/*
加载数据
/
-(void)loadData
{
if (self.rowData!=nil)
{
【self.rowData removeAllObjects】;
self.rowData=nil;
}
self.rowData = 【【NSMutableArray alloc】 init】;
for (int i=0 ; i[span style="color: rgba(128, 0, 128, 1)">100;i++)
{
【self.rowData addObject:【NSString stringWithFormat:@"Row: %i",i】】;
}
【self.tableView reloadData】;
}
- (void)scrollToTop:(UIButton )sender
{
NSIndexPath topRow = 【NSIndexPath //代码效果参考：http://www.lyjsj.net.cn/wx/art_23823.html
indexPathForRow:0 inSection:0】;【self.tableView scrollToRowAtIndexPath:topRow atScrollPosition:UITableViewScrollPositionTop animated:YES】;
}
- (void)scrollToBottom:(UIButton )sender
{
NSIndexPath bottomRow = 【NSIndexPath indexPathForRow:【self.rowData count】-1 inSection:0】;
【self.tableView scrollToRowAtIndexPath:bottomRow atScrollPosition:UITableViewScrollPositionBottom animated:YES】;
}
#pragma mark -UITableView delegates-
- (NSInteger)numberOfSectionsInTableView:(UITableView )tableView {
return 1;
}
- (NSInteger)tableView:(UITableView )tableView numberOfRowsInSection:(NSInteger)section {
return 【self.rowData count】;
}
- (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath )indexPath {
static NSString CellIdentifier = @"Cell";
UITableViewCell cell = (UITableViewCell *)【tableView dequeueReusableCellWithIdentifier:CellIdentifier】;
if (cell == nil) {
cell = 【【UITableViewCell alloc】 initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier】;
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.text = 【self.rowData objectAtIndex:indexPath.row】;
return cell;
}
@end
