UITableView - 使用 EGORefreshTableHeaderView 实现下拉刷新 UITableView
变更记录
序号 | 录入时间 | 录入人 | 备注 |
---|---|---|---|
1 | 2015-03-23 | Alfred Jiang | - |
2 | 2015-12-23 | Alfred Jiang | - |
方案名称
UITableView - 使用 EGORefreshTableHeaderView 实现下拉刷新 UITableView
关键字
UITableView \ EGORefreshTableHeaderView \ 下拉刷新
需求场景
- 需要实现列表数据的下拉刷新
参考链接
详细内容
#####1. EGORefreshTableHeaderView(.h.m)
EGORefreshTableHeaderView.h
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79//
// EGORefreshTableHeaderView.h
// Demo
//
// Created by Devin Doty on 10/14/09October14.
// Copyright 2009 enormego. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
typedef enum{
EGOOPullPulling = 0,
EGOOPullNormal,
EGOOPullLoading,
} EGOPullState;
#define DEFAULT_ARROW_IMAGE [UIImage imageNamed:@"blueArrow.png"]
#define DEFAULT_BACKGROUND_COLOR [UIColor colorWithRed:226.0/255.0 green:231.0/255.0 blue:237.0/255.0 alpha:1.0]
#define DEFAULT_TEXT_COLOR [UIColor colorWithRed:87.0/255.0 green:108.0/255.0 blue:137.0/255.0 alpha:1.0]
#define DEFAULT_ACTIVITY_INDICATOR_STYLE UIActivityIndicatorViewStyleWhite
#define FLIP_ANIMATION_DURATION 0.18f
#define PULL_AREA_HEIGTH 60.0f
#define PULL_TRIGGER_HEIGHT (PULL_AREA_HEIGTH + 5.0f)
@protocol EGORefreshTableHeaderDelegate;
@interface EGORefreshTableHeaderView : UIView {
id _delegate;
EGOPullState _state;
UILabel *_lastUpdatedLabel;
UILabel *_statusLabel;
CALayer *_arrowImage;
UIActivityIndicatorView *_activityView;
// Set this to Yes when egoRefreshTableHeaderDidTriggerRefresh delegate is called and No with egoRefreshScrollViewDataSourceDidFinishedLoading
BOOL isLoading;
}
@property(nonatomic,assign) id <EGORefreshTableHeaderDelegate> delegate;
- (void)refreshLastUpdatedDate;
- (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView;
- (void)egoRefreshScrollViewDidEndDragging:(UIScrollView *)scrollView;
- (void)egoRefreshScrollViewWillBeginDragging:(UIScrollView *)scrollView;
- (void)egoRefreshScrollViewDataSourceDidFinishedLoading:(UIScrollView *)scrollView;
- (void)startAnimatingWithScrollView:(UIScrollView *) scrollView;
- (void)setBackgroundColor:(UIColor *)backgroundColor textColor:(UIColor *) textColor arrowImage:(UIImage *) arrowImage;
@end
@protocol EGORefreshTableHeaderDelegate
- (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view;
@optional
- (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view;
@endEGORefreshTableHeaderView.m
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311//
// EGORefreshTableHeaderView.m
// Demo
//
// Created by Devin Doty on 10/14/09October14.
// Copyright 2009 enormego. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#import "EGORefreshTableHeaderView.h"
@interface EGORefreshTableHeaderView (Private)
- (void)setState:(EGOPullState)aState;
@end
@implementation EGORefreshTableHeaderView
@synthesize delegate=_delegate;
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
isLoading = NO;
CGFloat midY = frame.size.height - PULL_AREA_HEIGTH/2;
/* Config Last Updated Label */
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, midY, self.frame.size.width, 20.0f)];
label.autoresizingMask = UIViewAutoresizingFlexibleWidth;
label.font = [UIFont systemFontOfSize:12.0f];
label.shadowOffset = CGSizeMake(0.0f, 1.0f);
label.backgroundColor = [UIColor clearColor];
label.textAlignment = NSTextAlignmentCenter;
[self addSubview:label];
_lastUpdatedLabel=label;
/* Config Status Updated Label */
label = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, midY - 18, self.frame.size.width, 20.0f)];
label.autoresizingMask = UIViewAutoresizingFlexibleWidth;
label.font = [UIFont boldSystemFontOfSize:13.0f];
label.shadowOffset = CGSizeMake(0.0f, 1.0f);
label.backgroundColor = [UIColor clearColor];
label.textAlignment = NSTextAlignmentCenter;
[self addSubview:label];
_statusLabel=label;
/* Config Arrow Image */
CALayer *layer = [[CALayer alloc] init];
layer.frame = CGRectMake(25.0f,midY - 35, 30.0f, 55.0f);
layer.contentsGravity = kCAGravityResizeAspect;
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
layer.contentsScale = [[UIScreen mainScreen] scale];
}
#endif
[[self layer] addSublayer:layer];
_arrowImage=layer;
/* Config activity indicator */
UIActivityIndicatorView *view = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:DEFAULT_ACTIVITY_INDICATOR_STYLE];
view.frame = CGRectMake(25.0f,midY - 8, 20.0f, 20.0f);
[self addSubview:view];
_activityView = view;
[self setState:EGOOPullNormal];
/* Configure the default colors and arrow image */
[self setBackgroundColor:nil textColor:nil arrowImage:nil];
}
return self;
}
#pragma mark -
#pragma mark Setters
#define aMinute 60
#define anHour 3600
#define aDay 86400
- (void)refreshLastUpdatedDate {
NSDate * date = nil;
if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceLastUpdated:)]) {
date = [_delegate egoRefreshTableHeaderDataSourceLastUpdated:self];
}
if(date) {
NSTimeInterval timeSinceLastUpdate = [date timeIntervalSinceNow];
NSInteger timeToDisplay = 0;
timeSinceLastUpdate *= -1;
if(timeSinceLastUpdate < anHour) {
timeToDisplay = (NSInteger) (timeSinceLastUpdate / aMinute);
if(timeToDisplay == /* Singular*/ 1) {
_lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"更新于 %ld 分钟之前",@"PullTableViewLan",@"Last uppdate in minutes singular"),(long)timeToDisplay];
} else {
/* Plural */
_lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"更新于 %ld 分钟之前",@"PullTableViewLan",@"Last uppdate in minutes plural"), (long)timeToDisplay];
}
} else if (timeSinceLastUpdate < aDay) {
timeToDisplay = (NSInteger) (timeSinceLastUpdate / anHour);
if(timeToDisplay == /* Singular*/ 1) {
_lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"更新于 %ld 小时之前",@"PullTableViewLan",@"Last uppdate in hours singular"), (long)timeToDisplay];
} else {
/* Plural */
_lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"更新于 %ld 小时之前",@"PullTableViewLan",@"Last uppdate in hours plural"), (long)timeToDisplay];
}
} else {
timeToDisplay = (NSInteger) (timeSinceLastUpdate / aDay);
if(timeToDisplay == /* Singular*/ 1) {
_lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"更新于 %ld 天之前",@"PullTableViewLan",@"Last uppdate in days singular"), (long)timeToDisplay];
} else {
/* Plural */
_lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"更新于 %ld 天之前",@"PullTableViewLan",@"Last uppdate in days plural"), (long)timeToDisplay];
}
}
} else {
_lastUpdatedLabel.text = nil;
}
// Center the status label if the lastupdate is not available
CGFloat midY = self.frame.size.height - PULL_AREA_HEIGTH/2;
if(!_lastUpdatedLabel.text) {
_statusLabel.frame = CGRectMake(0.0f, midY - 8, self.frame.size.width, 20.0f);
} else {
_statusLabel.frame = CGRectMake(0.0f, midY - 18, self.frame.size.width, 20.0f);
}
}
- (void)setState:(EGOPullState)aState{
switch (aState) {
case EGOOPullPulling:
_statusLabel.text = NSLocalizedStringFromTable(@"Release to refresh ...",@"PullTableViewLan", @"Release to refresh status");
[CATransaction begin];
[CATransaction setAnimationDuration:FLIP_ANIMATION_DURATION];
_arrowImage.transform = CATransform3DMakeRotation((M_PI / 180.0) * 180.0f, 0.0f, 0.0f, 1.0f);
[CATransaction commit];
break;
case EGOOPullNormal:
if (_state == EGOOPullPulling) {
[CATransaction begin];
[CATransaction setAnimationDuration:FLIP_ANIMATION_DURATION];
_arrowImage.transform = CATransform3DIdentity;
[CATransaction commit];
}
_statusLabel.text = NSLocalizedStringFromTable(@"Pull down to refresh ...",@"PullTableViewLan", @"Pull down to refresh status");
[_activityView stopAnimating];
[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
_arrowImage.hidden = NO;
_arrowImage.transform = CATransform3DIdentity;
[CATransaction commit];
[self refreshLastUpdatedDate];
break;
case EGOOPullLoading:
_statusLabel.text = NSLocalizedStringFromTable(@"Loading ...",@"PullTableViewLan", @"Loading Status");
[_activityView startAnimating];
[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
_arrowImage.hidden = YES;
[CATransaction commit];
break;
default:
break;
}
_state = aState;
}
- (void)setBackgroundColor:(UIColor *)backgroundColor textColor:(UIColor *) textColor arrowImage:(UIImage *) arrowImage
{
self.backgroundColor = backgroundColor? backgroundColor : DEFAULT_BACKGROUND_COLOR;
if(textColor) {
_lastUpdatedLabel.textColor = textColor;
_statusLabel.textColor = textColor;
} else {
_lastUpdatedLabel.textColor = DEFAULT_TEXT_COLOR;
_statusLabel.textColor = DEFAULT_TEXT_COLOR;
}
_lastUpdatedLabel.shadowColor = [_lastUpdatedLabel.textColor colorWithAlphaComponent:0.1f];
_statusLabel.shadowColor = [_statusLabel.textColor colorWithAlphaComponent:0.1f];
_arrowImage.contents = (id)(arrowImage? arrowImage.CGImage : DEFAULT_ARROW_IMAGE.CGImage);
}
#pragma mark -
#pragma mark ScrollView Methods
- (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView {
if (_state == EGOOPullLoading) {
CGFloat offset = MAX(scrollView.contentOffset.y * -1, 0);
offset = MIN(offset, PULL_AREA_HEIGTH);
UIEdgeInsets currentInsets = scrollView.contentInset;
currentInsets.top = offset;
scrollView.contentInset = currentInsets;
} else if (scrollView.isDragging) {
if (_state == EGOOPullPulling && scrollView.contentOffset.y > -PULL_TRIGGER_HEIGHT && scrollView.contentOffset.y < 0.0f && !isLoading) {
[self setState:EGOOPullNormal];
} else if (_state == EGOOPullNormal && scrollView.contentOffset.y < -PULL_TRIGGER_HEIGHT && !isLoading) {
[self setState:EGOOPullPulling];
}
if (scrollView.contentInset.top != 0) {
UIEdgeInsets currentInsets = scrollView.contentInset;
currentInsets.top = 0;
scrollView.contentInset = currentInsets;
}
}
}
- (void)startAnimatingWithScrollView:(UIScrollView *) scrollView {
isLoading = YES;
[self setState:EGOOPullLoading];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.2];
UIEdgeInsets currentInsets = scrollView.contentInset;
currentInsets.top = PULL_AREA_HEIGTH;
scrollView.contentInset = currentInsets;
[UIView commitAnimations];
if(scrollView.contentOffset.y == 0){
[scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x, -PULL_TRIGGER_HEIGHT) animated:YES];
}
}
- (void)egoRefreshScrollViewDidEndDragging:(UIScrollView *)scrollView {
if (scrollView.contentOffset.y <= - PULL_TRIGGER_HEIGHT && !isLoading) {
if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDidTriggerRefresh:)]) {
[_delegate egoRefreshTableHeaderDidTriggerRefresh:self];
}
[self startAnimatingWithScrollView:scrollView];
}
}
- (void)egoRefreshScrollViewDataSourceDidFinishedLoading:(UIScrollView *)scrollView {
isLoading = NO;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.3];
UIEdgeInsets currentInsets = scrollView.contentInset;
currentInsets.top = 0;
scrollView.contentInset = currentInsets;
[UIView commitAnimations];
[self setState:EGOOPullNormal];
}
- (void)egoRefreshScrollViewWillBeginDragging:(UIScrollView *)scrollView
{
[self refreshLastUpdatedDate];
}
#pragma mark -
#pragma mark Dealloc
- (void)dealloc {
_delegate=nil;
[_activityView release];
[_statusLabel release];
[_arrowImage release];
[_lastUpdatedLabel release];
[super dealloc];
}
@end
#####2. 设置 ARC
1 | Project 名称 -> TARGETS -> Build Phases -> Compile Soucrce |
#####3. 引入并使用
引入头文件
1
#import "EGORefreshTableHeaderView.h"
实例化 EGORefreshTableHeaderView 对象
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8var headerRefreshView : EGORefreshTableHeaderView!
func setupRefreshTableView()
{
headerRefreshView = EGORefreshTableHeaderView(frame: CGRectMake(0, 0 - CGRectGetHeight(self.tableViewMain.frame), CGRectGetWidth(self.tableViewMain.frame), CGRectGetHeight(self.tableViewMain.frame)))
headerRefreshView.delegate = self
self.tableViewMain.addSubview(headerRefreshView)
}实现必要的代理
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28EGORefreshTableHeaderDelegate 和 UIScrollViewDelegate
// MARK : - Drag Refresh
func egoRefreshTableHeaderDidTriggerRefresh(view: EGORefreshTableHeaderView!) {
//
println("egoRefreshTableHeaderDidTriggerRefresh")
self.reloadTableViewDataSource()
dispatch_after(
dispatch_time(
DISPATCH_TIME_NOW,
Int64(3.0 * Double(NSEC_PER_SEC))
),
dispatch_get_main_queue(),{
self.endReloadTableViewDataSource()
})
}
func scrollViewDidScroll(scrollView: UIScrollView) {
headerRefreshView.egoRefreshScrollViewDidScroll(scrollView)
}
func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
headerRefreshView.egoRefreshScrollViewDidEndDragging(scrollView)
}实现刷新请求和结束操作函数
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9func reloadTableViewDataSource()
{
}
func endReloadTableViewDataSource()
{
self.headerRefreshView.egoRefreshScrollViewDataSourceDidFinishedLoading(self.tableViewMain)
}
效果图
(无)
备注
(无)
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