使用OC和swift创建系统自带的刷新界面
一：swift刷新界面代码：
import UIKit
class ViewController: UITableViewController {
// 用于显示的数据源
var _dataSource:[String] = []
// 加载更多 状态 风火轮
var _aiv:UIActivityIndicatorView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
// 数据源中的基础数据
for i in 0...2 {
_dataSource.append("(i)")
}
// 初始下拉刷新控件
self.refreshControl = UIRefreshControl()
self.refreshControl?.attributedTitle = NSAttributedString(string: "Pull To Refresh")
self.refreshControl?.tintColor = UIColor.greenColor()
self.refreshControl?.addTarget(self, action: "refresh", forControlEvents: .ValueChanged)
// 加载更多按扭的背景视图
var tableFooterView:UIView = UIView()
tableFooterView.frame = CGRectMake(0, 0, self.view.bounds.size.width, 44)
tableFooterView.backgroundColor = UIColor.greenColor()
self.tableView.tableFooterView = tableFooterView
// 加载更多的按扭
let loadMoreBtn = UIButton()
loadMoreBtn.frame = CGRectMake(0, 0, self.view.bounds.width, 44)
loadMoreBtn.setTitle("Load More", forState: .Normal)
loadMoreBtn.setTitleColor(UIColor.lightGrayColor(), forState: .Normal)
loadMoreBtn.addTarget(self, action: "loadMore:", forControlEvents: .TouchUpInside)
tableFooterView.addSubview(loadMoreBtn)
// 加载更多 状态 风火轮
_aiv = UIActivityIndicatorView(activityIndicatorStyle: .Gray)
_aiv.center = loadMoreBtn.center
tableFooterView.addSubview(_aiv)
}
// 加载更多方法
func loadMore(sender:UIButton) {
sender.hidden = true
_aiv.startAnimating()
dispatch_async(dispatch_get_global_queue(0, 0), { () -> Void in
self._dataSource.append("(self._dataSource[self._dataSource.count-1].toInt()! + 1)")
dispatch_async(dispatch_get_main_queue(), { () -> Void in
sleep(1)
self._aiv.stopAnimating()
sender.hidden = false
self.tableView.reloadData()
})
})
}
// 下拉刷新方法
func refresh() {
if self.refreshControl?.refreshing == true {
self.refreshControl?.attributedTitle = NSAttributedString(string: "Loading...")
}
dispatch_async(dispatch_get_global_queue(0, 0), { () -> Void in
self._dataSource.insert("(self._dataSource[0].toInt()! - 1)", atIndex: 0)
dispatch_async(dispatch_get_main_queue(), { () -> Void in
sleep(1)
self.refreshControl?.endRefreshing()
self.refreshControl?.attributedTitle = NSAttributedString(string: "Pull To Refresh")
self.tableView.reloadData()
})
})
}
// tableView dataSource
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return _dataSource.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let identifier = "cell"
var cell = tableView .dequeueReusableCellWithIdentifier(identifier) as? UITableViewCell
if cell == nil {
cell = UITableViewCell(style: .Default, reuseIdentifier: identifier)
}
cell?.textLabel?.text = "(_dataSource[indexPath.row])"
return cell!
}
}
二：OC刷新界面代码：
#import "ViewController.h"
@interface ViewController ()
{
// 数据源
NSMutableArray * _dataSource;
// 风火轮
UIActivityIndicatorView * _aiv;
}
@end
@implementation ViewController
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// 初始数据源
_dataSource = [[NSMutableArray alloc] init];
// 基础数据
for (int i=0; i<3; i++) {
[_dataSource addObject:[NSString stringWithFormat:@"%d",i]];
}
// 刷新控件
self.refreshControl = [[UIRefreshControl alloc] init];
self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull To Refresh"];
self.refreshControl.tintColor = [UIColor greenColor];
[self.refreshControl addTarget:self action:@selector(refresh) forControlEvents:UIControlEventValueChanged];
// 背景视图
UIView * tableFooterView = [[UIView alloc] init];
tableFooterView.frame = CGRectMake(0, 0, self.view.bounds.size.width, 44);
tableFooterView.backgroundColor = [UIColor greenColor];
self.tableView.tableFooterView = tableFooterView;
// 加载更多按扭
UIButton * loadMoreBtn = [[UIButton alloc] init];
loadMoreBtn.frame = CGRectMake(0, 0, self.view.bounds.size.width, 44);
[loadMoreBtn setTitle:@"Load More" forState:UIControlStateNormal];
[loadMoreBtn setTitleColor:[UIColor lightGrayColor] forState:UIControlStateNormal];
[loadMoreBtn addTarget:self action:@selector(loadMore:) forControlEvents:UIControlEventTouchUpInside];
[tableFooterView addSubview:loadMoreBtn];
// 风火轮
_aiv = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
_aiv.center = loadMoreBtn.center;
[tableFooterView addSubview:_aiv];
}
// 加载更多方法
- (void)loadMore:(UIButton *)sender
{
sender.hidden = YES;
[_aiv startAnimating];
dispatch_async(dispatch_get_global_queue(0, 0), ^{
[_dataSource addObject: [NSString stringWithFormat:@"%d", [_dataSource[_dataSource.count-1] intValue] + 1]];
dispatch_async(dispatch_get_main_queue(), ^{
sleep(1);
[_aiv stopAnimating];
sender.hidden = NO;
[self.tableView reloadData];
});
});
}
// 下拉刷新方法
- (void)refresh {
if (self.refreshControl.refreshing) {
self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Loading..."];
}
dispatch_async(dispatch_get_global_queue(0, 0), ^{
[_dataSource insertObject:[NSString stringWithFormat:@"%d", [_dataSource[0] intValue] -1] atIndex:0];
dispatch_async(dispatch_get_main_queue(), ^{
sleep(1);
[self.refreshControl endRefreshing];
self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull To Refresh"];
[self.tableView reloadData];
});
});
}
// tableView dataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return _dataSource.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString * identifier = @"cell";
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
}
cell.textLabel.text = _dataSource[indexPath.row];
return cell;
}
@end