iOS,自定义控件

下拉刷新控件

@property(nonatomic,strong) VRefreshHeadView *vrefresh;

[self vrefresh];

-(VRefreshHeadView *)vrefresh{

__weak typeof(self) weakSelf = self;

if (!_vrefresh) {

_vrefresh=[[VRefreshHeadView alloc] initWithScrollView:weakSelf.tbView beginRefreshBlock:^(VRefreshHeadView *vrefresh) {

NSLog(@"进入刷新回调");

[self performSelector:@selector(endVrefresh) withObject:nil afterDelay:3.0f];

}];

}

return _vrefresh;

}

-(void)endVrefresh{

[_vrefresh endRefresh];

}

// VRefreshHeadView.h

// 下拉刷新控件

// Created by Vie on 2016/10/10.

#import <UIKit/UIKit.h>

typedef NS_ENUM(NSUInteger, VRefreshType) {

VRefreshTypeDefault = 0,//默认下拉刷新样式

};

@interface VRefreshHeadView : UIView

typedef void (^beginRefreshBlock) (VRefreshHeadView *vrefresh);//刷新事件回调

@property(nonatomic,assign) NSUInteger type;//刷新视图样式

/**

创建下拉刷新视图

@param scrollView 滚动视图

@param beginRefreshBlock 开始刷新回调

@return 刷新视图对象

-(instancetype)initWithScrollView:(UIScrollView *)scrollView beginRefreshBlock:(beginRefreshBlock)beginRefreshBlock;

//停止刷新

-(void)endRefresh;

@end

// VRefreshHeadView.m

// 下拉刷新控件

// Created by Vie on 2016/10/10.

#import "VRefreshHeadView.h"

#define vRefreshHeadViewHeight 40

#define navBarHeight 64 //竖屏导航栏和控制器高度(竖屏导航栏高度44，竖屏状态栏高度为20、打电话或者某些情况为40)

@interface VRefreshHeadView ()

@property (nonatomic,copy) beginRefreshBlock beginRefreshBlock;

@property(nonatomic,weak) UIScrollView *scrollView;

/**

*头部提示语

@property(nonatomic,weak) UILabel *headTipLable;

/**

* 加载提示

@property (nonatomic, weak) UIActivityIndicatorView *indicatorView;

/**

*是否处于刷新状态

@property(nonatomic,assign) BOOL isRefresh;

@end

@implementation VRefreshHeadView

#pragma mark - init方法

-(instancetype)initWithScrollView:(UIScrollView *)scrollView beginRefreshBlock:(beginRefreshBlock)beginRefreshBlock{

self=[super initWithFrame:CGRectMake(0, -vRefreshHeadViewHeight, scrollView.frame.size.width, vRefreshHeadViewHeight)];

if (self) {

_scrollView=scrollView;

_beginRefreshBlock=beginRefreshBlock;

//把当前视图加载到scrollView的UI

[_scrollView addSubview:self];

//设置背景颜色

self.backgroundColor=[UIColor clearColor];

//默认不在刷新状态

self.isRefresh=false;

//注册观察者,监听下拉刷新改变

[_scrollView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];

}

return self;

}

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{

if ([keyPath isEqualToString:@"contentOffset"]) {

if (_scrollView.contentOffset.y<(-navBarHeight-vRefreshHeadViewHeight)&&!self.isRefresh&&_scrollView.dragging) {

[self.indicatorView startAnimating];

self.isRefresh=true;

self.headTipLable.text=@"加载中..";

_scrollView.contentInset = UIEdgeInsetsMake(vRefreshHeadViewHeight+navBarHeight, 0, 0, 0);

if (_beginRefreshBlock) {

_beginRefreshBlock(self);

}

//停止刷新

-(void)endRefresh{

[UIView animateWithDuration:0.3 animations:^{

// _scrollView.contentInset = UIEdgeInsetsZero;

_scrollView.contentInset = UIEdgeInsetsMake(navBarHeight, 0, 0, 0);

} completion:^(BOOL finished) {

[self.indicatorView stopAnimating];

self.isRefresh=false;

_headTipLable.text=@"下拉刷新数据";

}];

}

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

// Drawing code

if (_type) {

}else{

//没有指定type用默认视图

[self setDefaultView];

}

//默认样式

-(void)setDefaultView{

[self headTipLable];

}

#pragma mark - 懒加载创建控件

- (UIActivityIndicatorView *)indicatorView

{

if (!_indicatorView)

{

UIActivityIndicatorView *act = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(50, 0, 30, self.frame.size.height)];

act.color = [UIColor grayColor];

[self addSubview:act];

_indicatorView = act;

}

return _indicatorView;

}

-(UILabel *)headTipLable{

if (!_headTipLable) {

UILabel *lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width,self.frame.size.height)];

lb.textAlignment = NSTextAlignmentCenter;

lb.textColor = [UIColor grayColor];

lb.font = [UIFont systemFontOfSize:13];

lb.text = @"下拉刷新数据";

[self addSubview:lb];

_headTipLable = lb;

}

return _headTipLable;

}

-(void)dealloc{

[_scrollView removeObserver:self forKeyPath:@"contentOffset"];

}

@end

下拉加载更多控件

@property(nonatomic,strong) VLoadMoreFootView *vload;

[self vload];

-(VLoadMoreFootView *)vload{

__weak typeof(self) weakSelf=self;

if (!_vload) {

_vload=[[VLoadMoreFootView alloc] initWithScrollView:weakSelf.tbView beginLoadMoreBlock:^(VLoadMoreFootView *vrefresh) {

NSLog(@"进入上拉加载");

[self performSelector:@selector(endVload) withObject:nil afterDelay:3.0f];

}];

}

return _vload;

}

-(void)endVload{

[_vload endLoadMore];

}

// VLoadMoreFootView.h

// 上拉加载更多控件

// Created by Vie on 2016/10/17.

#import <UIKit/UIKit.h>

typedef NS_ENUM(NSUInteger, VLoadMoreType) {

VLoadMoreTypeDefault = 0,//默认上拉加载样式

};

@interface VLoadMoreFootView : UIView

typedef void (^beginLoadMoreBlock) (VLoadMoreFootView *vrefresh);//加载更多事件回调

@property(nonatomic,assign) NSUInteger type;//加载更多视图样式

/**

创建上拉加载新视图

@param scrollView 滚动视图

@param beginLoadMoreBlock 开始加载更多回调

@return 加载视图对象

-(instancetype)initWithScrollView:(UIScrollView *)scrollView beginLoadMoreBlock:(beginLoadMoreBlock)beginLoadMoreBlock;

//停止加载

-(void)endLoadMore;

@end

// VLoadMoreFootView.m

// 上拉加载更多控件

// Created by Vie on 2016/10/17.

#import "VLoadMoreFootView.h"

#define vLoadMoreBottomViewHeight 40

#define navBarHeight 64 //竖屏导航栏和控制器高度(竖屏导航栏高度44，竖屏状态栏高度为20、打电话或者某些情况为40)

@interface VLoadMoreFootView()

@property(nonatomic,copy) beginLoadMoreBlock beginLoadMoreBlock;

@property(nonatomic,weak) UIScrollView *scrollView;

/**

*底部提示语

@property(nonatomic,weak) UILabel *bottomTipLable;

/**

*加载提示

@property(nonatomic,weak) UIActivityIndicatorView *indicatorView;

/**

*是否处于加载状态

@property(nonatomic,assign) BOOL isLoad;

@end

@implementation VLoadMoreFootView

#pragma mark - init方法

-(instancetype)initWithScrollView:(UIScrollView *)scrollView beginLoadMoreBlock:(beginLoadMoreBlock)beginLoadMoreBlock{

self=[super initWithFrame:CGRectMake(0, 0, scrollView.frame.size.width, vLoadMoreBottomViewHeight)];

if (self) {

_scrollView=scrollView;

_beginLoadMoreBlock=beginLoadMoreBlock;

//把当前视图加载到scrollView的UI

[_scrollView addSubview:self];

//设置背景颜色

self.backgroundColor=[UIColor clearColor];

//默认不在加载状态

self.isLoad=false;

//注册观察这，监听上拉加载改变

[_scrollView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];

}

return self;

}

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{

if ([keyPath isEqualToString:@"contentOffset"]) {

if (_scrollView.contentOffset.y>(_scrollView.contentSize.height-_scrollView.frame.size.height)&&!self.isLoad&&_scrollView.dragging) {

[self.indicatorView startAnimating];

self.isLoad=true;

self.bottomTipLable.text=@"加载中..";

_scrollView.contentInset = UIEdgeInsetsMake(0, 0, vLoadMoreBottomViewHeight, 0);

if (_beginLoadMoreBlock) {

_beginLoadMoreBlock(self);

}

//停止加载

-(void)endLoadMore{

[UIView animateWithDuration:0.3 animations:^{

// _scrollView.contentInset = UIEdgeInsetsZero;

_scrollView.contentInset = UIEdgeInsetsMake(navBarHeight, 0, 0, 0);

} completion:^(BOOL finished) {

[self.indicatorView stopAnimating];

self.isLoad=false;

_bottomTipLable.text = @"上拉加载更多数据";

}];

}

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

// Drawing code

if (_type) {

}else{

//没有指定type用默认视图

[self setDefaultView];

}

//默认样式

-(void)setDefaultView{

[self bottomTipLable];

}

-(UILabel *)bottomTipLable{

if (!_bottomTipLable) {

UILabel *lb = [[UILabel alloc] initWithFrame:CGRectMake(0, _scrollView.contentSize.height, self.frame.size.width,self.frame.size.height)];

lb.textAlignment = NSTextAlignmentCenter;

lb.textColor = [UIColor grayColor];

lb.font = [UIFont systemFontOfSize:13];

lb.text = @"上拉加载更多数据";

[self addSubview:lb];

_bottomTipLable = lb;

}

return _bottomTipLable;

}

#pragma mark - 懒加载创建控件

- (UIActivityIndicatorView *)indicatorView

{

if (!_indicatorView)

{

UIActivityIndicatorView *act = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(50, _scrollView.contentSize.height, 30, self.frame.size.height)];

act.color = [UIColor grayColor];

[self addSubview:act];

_indicatorView = act;

}

return _indicatorView;

}

-(void)dealloc{

[_scrollView removeObserver:self forKeyPath:@"contentOffset"];

}

@end

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