11.gif
头文件
#import <UIKit/UIKit.h>
#import <MJRefresh.h>
//下拉刷新控件
@interface ZZZRefreshHeader : MJRefreshHeader
@end
实现文件
#define MIN_HEIGHT 50.0
@interface ZZZRefreshHeader()
@property (nonatomic,strong) UIView *cuteView;
@property (nonatomic, strong) CAShapeLayer *shapeLayer;
@property (nonatomic,strong) LOTAnimationView *animateBegin;
@property (nonatomic,strong) LOTAnimationView *animateLoading;
@end
@implementation ZZZRefreshHeader
#pragma mark - 重写方法
#pragma mark 在这里做一些初始化配置（比如添加子控件）
- (void)prepare
{
[super prepare];
self.layer.zPosition = -1;
// 设置自动切换透明度(在导航栏下面自动隐藏)
self.mj_h = MIN_HEIGHT;
self.cuteView = [[UIView alloc]init];
self.cuteView.backgroundColor = RGBCOLOR(246, 247, 248);
[self addSubview:self.cuteView];
self.animateBegin.hidden = NO;
self.animateLoading.hidden = NO;
[self configShapeLayer];
}
#pragma mark 在这里设置子控件的位置和尺寸
- (void)placeSubviews
{
[super placeSubviews];
self.cuteView.frame = CGRectMake(0, 0, self.mj_w, MIN_HEIGHT);
}
-(LOTAnimationView *)animateBegin
{
if (_animateBegin == nil) {
_animateBegin = [LOTAnimationView animationNamed:@"loadbegin"];
_animateBegin.loopAnimation = NO;
_animateBegin.frame = CGRectMake(0, 0, 50, 50);
[self addSubview:_animateBegin];
// [self addSubview:self.testView];
}
return _animateBegin;
}
-(LOTAnimationView *)animateLoading
{
if (_animateLoading == nil) {
_animateLoading = [LOTAnimationView animationNamed:@"loading"];
_animateLoading.loopAnimation = YES;
_animateLoading.frame = CGRectMake(0, 0, 50, 50);
[self addSubview:_animateLoading];
}
return _animateLoading;
}
- (void)configShapeLayer
{
_shapeLayer = [CAShapeLayer layer];
_shapeLayer.fillColor = RGBCOLOR(246, 247, 248).CGColor;
[self.cuteView.layer addSublayer:_shapeLayer];
}
- (void)updateShapeLayerPath:(CGFloat)offsetY
{
// 更新_shapeLayer形状
UIBezierPath *tPath = [UIBezierPath bezierPath];
[tPathmoveToPoint:CGPointMake(0, 0)]; // r1点
[tPathaddLineToPoint:CGPointMake(self.cuteView.width, 0)]; // r2点
[tPathaddLineToPoint:CGPointMake(self.cuteView.width, MIN_HEIGHT)]; // r4点
[tPathaddQuadCurveToPoint:CGPointMake(0, MIN_HEIGHT)
controlPoint:CGPointMake(self.cuteView.width/2, -offsetY)]; // r3,r4,r5确定的一个弧线
[tPathclosePath];
_shapeLayer.path = tPath.CGPath;
}
#pragma mark 监听scrollView的contentOffset改变
- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change
{
[super scrollViewContentOffsetDidChange:change];
CGPoint nPoint = [[change objectForKey:@"new"] CGPointValue];
// DLog(@"contentOffset改变:%@,,%f",change,nPoint.y);
CGFloat animateY = 0;
if (nPoint.y + MIN_HEIGHT <= 0) {
self.cuteView.y = nPoint.y + MIN_HEIGHT;
animateY = nPoint.y + MIN_HEIGHT + MIN_HEIGHT/2;
}else{
self.cuteView.y = 0;
animateY =MIN_HEIGHT+nPoint.y/2;
}
[self updateShapeLayerPath:nPoint.y];
self.animateLoading.center = CGPointMake(self.mj_w/2, animateY);
self.animateBegin.center = self.animateLoading.center;
if (nPoint.y == 0) {
[UIView animateWithDuration:0.1 animations:^{
self.animateBegin.center = CGPointMake(self.animateBegin.center.x, self.animateBegin.centerY - 25);
}];
}
}
#pragma mark 监听scrollView的contentSize改变
- (void)scrollViewContentSizeDidChange:(NSDictionary *)change
{
[super scrollViewContentSizeDidChange:change];
}
#pragma mark 监听scrollView的拖拽状态改变
- (void)scrollViewPanStateDidChange:(NSDictionary *)change
{
[super scrollViewPanStateDidChange:change];
// DLog(@"拖拽状态改变:%@",change);
}
#pragma mark 监听控件的刷新状态
- (void)setState:(MJRefreshState)state
{
MJRefreshCheckState;
// 根据状态做事情
if (state == MJRefreshStateIdle) {
if (oldState == MJRefreshStateRefreshing) {
self.animateBegin.hidden = NO;
self.animateLoading.hidden = YES;
[self.animateLoading pause];
}else if( oldState == MJRefreshStatePulling) {
self.animateBegin.hidden = NO;
self.animateLoading.hidden = YES;
[self.animateLoading pause];
}else{
self.animateBegin.hidden = YES;
self.animateLoading.hidden = YES;
[self.animateLoading pause];
}
}else if (state == MJRefreshStatePulling) {
self.animateBegin.hidden = NO;
self.animateLoading.hidden = YES;
[self.animateLoading pause];
}else if (state == MJRefreshStateRefreshing) {
self.animateBegin.hidden = YES;
self.animateLoading.hidden = NO;
self.animateLoading.animationProgress = 0;
[self.animateLoading play];
}else{
self.animateBegin.hidden = YES;
self.animateLoading.hidden = YES;
}
}
#pragma mark 监听拖拽比例（控件被拖出来的比例）
- (void)setPullingPercent:(CGFloat)pullingPercent
{
[super setPullingPercent:pullingPercent];
// DLog(@"当前进度：%f",pullingPercent);
CGFloat progressBegin = pullingPercent - 1 > 0 ? 1.0:pullingPercent;
self.animateBegin.animationProgress = progressBegin*0.64;
}
@end
其中有使用到动画框架 《Lottie》
勉强可以使用，但是赶脚还是有不少问题，请各位大佬指正
问题1：在UICollectionView 使用的时候，添加的视图会超出header，使用了各种方法，层次还是有点问题。
问题2：当在UINavigationController中使用时，如果标题栏隐藏，会出现视图错位。
持续修复中....
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