1、等待网络请求的占位图。
1.png
借助MBProgressHUD自定义view实现。
[MBProgressHUD show:@"" icon:@"矢量智能对象" view:self.view];
+ (void)show:(NSString *)text icon:(NSString *)icon view:(UIView *)view
{
if (view == nil) view = [UIApplication sharedApplication].keyWindow;
// 快速显示一个提示信息
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:view animated:YES];
// hud.label.text = text;
hud.mode = MBProgressHUDModeCustomView;
// 设置图片
UIImage *image =[UIImage imageNamed:icon];
hud.customView = [[UIImageView alloc] initWithImage:image]; // 再设置模式
hud.bezelView.backgroundColor =[UIColor whiteColor];
hud.backgroundView.backgroundColor =[UIColor whiteColor];
// 隐藏时候从父控件中移除
hud.removeFromSuperViewOnHide = YES;
}
网络异常重新加载的占位图,以及无数据的占位图。
2.png
3.png
对比了一下Reachability以及AFNetWorking中 AFNetworkReachabilityManager两种检测网路的方法，感觉都不是很准。
只能借助网络请求之后的错误码code，当code 为-1099时，AFNetWorking提示网络断开连接。可以根据 返回code码做文章。
使用分类来给view扩展占位图。关于扩展属性,可以了解运行时。
#import <UIKit/UIKit.h>
typedef void (^ReGetNetwork)(void);
@interface UIView (NCPlaceholder)
@property(nonatomic,copy)ReGetNetwork reGetwork; //重新刷新网络的回调
-(void)showNoNetworkViewWithBlock:(ReGetNetwork)reGetwork;//无网络时点击重新刷新网络
-(void)showNoDataView;//无数据view
-(void)hideNoNetworkView;
-(void)hideNoDataView;
@end
#import "UIView+NCPlaceholder.h"
#import <objc/runtime.h>
#import "NCNoNetWorkView.h"
#define Device_Width [[UIScreen mainScreen] bounds].size.width//获取屏幕宽高
#define Device_Height [[UIScreen mainScreen] bounds].size.height
@implementation UIView (NCPlaceholder)
-(void)showNoNetworkViewWithBlock:(ReGetNetwork)reGetwork{
NCNoNetWorkView *noView =[[NSBundle mainBundle]loadNibNamed:@"NCNoNetWorkView" owner:self options:nil].firstObject;
noView.tag = 2593;
noView.frame = CGRectMake(0, 64, Device_Width, Device_Height - 64);
noView.imageView.image =[UIImage imageNamed:@"nothing"];
noView.noticeTitle.text = @"当前网络无连接";
noView.reLoadBtn.hidden = NO;
[noView.reLoadBtn addTarget:self action:@selector(reLoadBtnAction) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:noView];
self.reGetwork = reGetwork;
}
-(void)reLoadBtnAction{
if (self.reGetwork) {
self.reGetwork();
}
}
-(void)showNoDataView{
NCNoNetWorkView *noView =[[NSBundle mainBundle]loadNibNamed:@"NCNoNetWorkView" owner:self options:nil].firstObject;
noView.frame = CGRectMake(0, 64, Device_Width, Device_Height - 64);
noView.tag = 2592;
noView.imageView.image =[UIImage imageNamed:@"nothing"];
noView.noticeTitle.text = @"无数据";
noView.reLoadBtn.hidden = YES;
[self addSubview:noView];
}
-(void)hideNoNetworkView{
NCNoNetWorkView *noView = (NCNoNetWorkView *)[self viewWithTag:2593];
if (noView) {
[noView removeFromSuperview];
}
}
-(void)hideNoDataView{
NCNoNetWorkView *noDataView = (NCNoNetWorkView *)[self viewWithTag:2592];
if (noDataView) {
[noDataView removeFromSuperview];
}
}
-(ReGetNetwork)reGetwork{
return objc_getAssociatedObject(self, @selector(reGetwork));
}
-(void)setReGetwork:(ReGetNetwork)reGetwork{
objc_setAssociatedObject(self, @selector(reGetwork), reGetwork, OBJC_ASSOCIATION_COPY_NONATOMIC);
}
@end
使用方法：
1、网络异常重新加载的占位图：
[self.view showNoNetworkViewWithBlock:^{
NSLog(@"%@",[weakSelf class]); //可重新请求网络
[weakSelf.view hideNoNetworkView];
}];
2、网络无数据的占位图：
[self.view showNoDataView];
