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//
// UIScrollView+GifPullToRefresh.m
// CHGifRefreshControl
//
// Created by HangChen on 12/1/13.
// Copyright (c) 2013 Hang Chen (https://github.com/cyndibaby905)
//
// 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 "UIScrollView+GifPullToRefresh.h"
#import <objc/runtime.h>
#define GifRefreshControlHeight 110
@interface CHGifRefreshControl()
- (void)removeObservers;
@end
typedef enum
{
GifPullToRefreshStateDrawing = 0,
GifPullToRefreshStateLoading,
} GifPullToRefreshState;
static char UIScrollViewGifPullToRefresh;
@implementation UIScrollView (GifPullToRefresh)
- (void)setRefreshControl:(CHGifRefreshControl *)pullToRefreshView {
[self willChangeValueForKey:@"UIScrollViewGifPullToRefresh"];
objc_setAssociatedObject(self, &UIScrollViewGifPullToRefresh,
pullToRefreshView,
OBJC_ASSOCIATION_ASSIGN);
[self didChangeValueForKey:@"UIScrollViewGifPullToRefresh"];
}
- (CHGifRefreshControl *)refreshControl {
return objc_getAssociatedObject(self, &UIScrollViewGifPullToRefresh);
}
- (void)addPullToRefreshWithDrawingImgs:(NSArray*)drawingImgs andLoadingImgs:(NSArray*)loadingImgs andActionHandler:(void (^)(void))actionHandler
{
CHGifRefreshControl *view = [[CHGifRefreshControl alloc] initWithFrame:CGRectMake(0, -GifRefreshControlHeight, self.bounds.size.width, GifRefreshControlHeight)];
if ([[UIDevice currentDevice].systemVersion floatValue] >= 7.0) {
view.originalContentInsectY = 64;
}
view.scrollView = self;
view.pullToRefreshActionHandler = actionHandler;
view.drawingImgs = drawingImgs;
view.loadingImgs = loadingImgs;
[self addSubview:view];
self.refreshControl = view;
}
- (void)removePullToRefresh
{
[self.refreshControl removeObservers];
}
- (void)didFinishPullToRefresh:(void (^)(void))animate completion:(void (^)(void))completion
{
[self.refreshControl endLoading:^{
if (animate) {
animate();
}
} completion:^{
if (completion) {
completion();
}
}];
}
@end
@implementation CHGifRefreshControl {
GifPullToRefreshState _state;
BOOL _isTrigged;
UIImageView *_refreshView;
UILabel *_refreshTimeLabel;
NSDate *_lastUpdateDate;
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
_refreshView = [[UIImageView alloc] initWithFrame:self.bounds];
_refreshView.contentMode = UIViewContentModeScaleAspectFit;
_refreshView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[self addSubview:_refreshView];
_refreshTimeLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, CGRectGetHeight(self.bounds)-20, CGRectGetWidth(self.bounds), 18)];
_refreshTimeLabel.textColor = [UIColor colorWithHexString:TextGray];
_refreshTimeLabel.font = appFont(15, NO);
_refreshTimeLabel.textAlignment = NSTextAlignmentCenter;
_refreshTimeLabel.autoresizingMask = AutoresizingAuto;
_refreshTimeLabel.backgroundColor = [UIColor clearColor];
_refreshTimeLabel.text = @"刚刚";
[self addSubview:_refreshTimeLabel];
}
return self;
}
- (void)dealloc
{
[self removeObservers];
}
- (void)removeObservers
{
[_scrollView removeObserver:self forKeyPath:@"contentOffset"];
[_scrollView removeObserver:self forKeyPath:@"pan.state"];
_scrollView = nil;
}
- (void)setScrollView:(UIScrollView *)scrollView
{
[self removeObservers];
_scrollView = scrollView;
[_scrollView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionNew context:nil];
[_scrollView addObserver:self forKeyPath:@"pan.state" options:NSKeyValueObservingOptionNew context:nil];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
// 刷新操作：栏目导航页和频道页刷新时异常(bug:5968) 首页：快速多次下拉刷新，会卡住（bug:5967）
if (_state == GifPullToRefreshStateLoading) {
_refreshTimeLabel.text = getUpdateStringFromDate(_lastUpdateDate);
_refreshTimeLabel.hidden = NO;
return;
}
if (self.scrollView.contentOffset.y + self.originalContentInsectY <= 0) {
if ([keyPath isEqualToString:@"pan.state"]) {
if (self.scrollView.panGestureRecognizer.state == UIGestureRecognizerStateEnded && _isTrigged) {
[self setState:GifPullToRefreshStateLoading];
[UIView animateWithDuration:0.2
delay:0
options:UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionBeginFromCurrentState
animations:^{
self.scrollView.contentOffset = CGPointMake(0, -GifRefreshControlHeight - self.originalContentInsectY);
self.scrollView.contentInset = UIEdgeInsetsMake(GifRefreshControlHeight + self.originalContentInsectY, 0.0f, 0.0f, 0.0f);
}
completion:^(BOOL finished) {
if (self.pullToRefreshActionHandler) {
self.pullToRefreshActionHandler();
}
}];
}else if (self.scrollView.panGestureRecognizer.state == UIGestureRecognizerStateBegan) {
_refreshTimeLabel.text = getUpdateStringFromDate(_lastUpdateDate);
_refreshTimeLabel.hidden = NO;
}
}
else if([keyPath isEqualToString:@"contentOffset"]){
[self scrollViewContentOffsetChanged];
}
}
}
- (void)manulHeadRefresh {
[self setState:GifPullToRefreshStateLoading];
[UIView animateWithDuration:0.2
delay:0
options:UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionBeginFromCurrentState
animations:^{
self.scrollView.contentOffset = CGPointMake(0, -GifRefreshControlHeight-self.topicFrangePageInsectY );
self.scrollView.contentInset = UIEdgeInsetsMake(GifRefreshControlHeight+self.topicFrangePageInsectY, 0.0f, 0.0f, 0.0f);
}
completion:^(BOOL finished) {
if (self.pullToRefreshActionHandler) {
self.pullToRefreshActionHandler();
}
}];
}
- (void)scrollViewContentOffsetChanged
{
if (_state != GifPullToRefreshStateLoading) {
if (self.scrollView.isDragging && self.scrollView.contentOffset.y + self.originalContentInsectY < -GifRefreshControlHeight && !_isTrigged) {
_isTrigged = YES;
}
else {
if (self.scrollView.isDragging && self.scrollView.contentOffset.y + self.originalContentInsectY > -GifRefreshControlHeight) {
_isTrigged = NO;
}
[self setState:GifPullToRefreshStateDrawing];
}
}
}
- (void)setState:(GifPullToRefreshState)aState{
CGFloat offset = -(self.scrollView.contentOffset.y + self.originalContentInsectY);
CGFloat percent = 0;
if (offset < 0) {
offset = 0;
}
if (offset > GifRefreshControlHeight) {
offset = GifRefreshControlHeight;
}
percent = offset / GifRefreshControlHeight;
NSUInteger drawingIndex = percent * (self.drawingImgs.count - 1);
switch (aState)
{
case GifPullToRefreshStateDrawing:
[_refreshView stopAnimating];
_refreshView.image = self.drawingImgs[drawingIndex];
break;
case GifPullToRefreshStateLoading:
_refreshView.animationImages = self.loadingImgs;
_refreshView.animationDuration = (CGFloat)self.loadingImgs.count/40.0;
[_refreshView startAnimating];
break;
default:
break;
}
_state = aState;
}
- (void)endLoading:(void (^)(void))animate completion:(void (^)(void))completion
{
if (_state == GifPullToRefreshStateLoading || _state == GifPullToRefreshStateDrawing) {
_isTrigged = NO;
[self setState:GifPullToRefreshStateDrawing];
if (animate) {
animate();
}
[UIView animateWithDuration:0.35
delay:0
options:UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionBeginFromCurrentState
animations:^{
_refreshTimeLabel.hidden = YES;
self.scrollView.contentInset = UIEdgeInsetsMake(self.originalContentInsectY, 0.0f, 0.0f, 0.0f);
}
completion:^(BOOL finished) {
_lastUpdateDate = [NSDate date];
if (completion) {
completion();
}
}];
// [UIView animateWithDuration:0.2 animations:^{
//
// } completion:^(BOOL finished) {
// [UIView animateWithDuration:0.35
// delay:0
// options:UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionBeginFromCurrentState
// animations:^{
// _refreshTimeLabel.hidden = YES;
// self.scrollView.contentInset = UIEdgeInsetsMake(self.originalContentInsectY, 0.0f, 0.0f, 0.0f);
// }
// completion:^(BOOL finished) {
// _lastUpdateDate = [NSDate date];
// if (completion) {
// completion();
// }
// }];
// }];
}
}
@end
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