runtime簡單使用-Empty-展示VC

#import <UIKit/UIKit.h>

@interface UIViewController (Empty)

(void)showEmptyWithTitle:(NSString *)title;
(void)hideEmptyView;
(void)showEmptyTitle:(NSString *)title;
(void)hideEmptyTitle;

@end

#import "UIViewController+Empty.h"

#import "CCEmptyView.h"

#import <objc/runtime.h>

static char emptyKey;

@implementation UIViewController (Empty)

(CCEmptyView *)emptyView{

CCEmptyView *emptyView = objc_getAssociatedObject(self, &emptyKey);

if (emptyView) {

  return emptyView;
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}else{

  emptyView = [[CCEmptyView alloc] initWithFrame:self.view.bounds imageName:@"empty" title:nil];
  
  objc_setAssociatedObject(self, &emptyKey, emptyView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}

return emptyView;

}

(void)showEmptyWithTitle:(NSString *)title{
CCEmptyView *emptyView = [self emptyView];

[self.view addSubview:emptyView];

[emptyView setTitle:title];

[emptyView showEmpty];

}

(void)hideEmptyView{
[[self emptyView] hideEmpty];

}

(void)showEmptyTitle:(NSString *)title{

UILabel *titleLabel = [self.view viewWithTag:111];

if (!titleLabel) {

  titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, ScreenW, 50)];
  
  titleLabel.textAlignment = NSTextAlignmentCenter;
  
  titleLabel.font = [UIFont systemFontOfSize:16];
  
  titleLabel.textColor =[UIColor redColor];
  
  titleLabel.tag = 111;
  
  titleLabel.numberOfLines = 0;
  
  titleLabel.center = self.view.center;
  
  [self.view addSubview:titleLabel];
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}

titleLabel.hidden = NO;

titleLabel.text = title;

}

(void)hideEmptyTitle{
UILabel *titleLabel = [self.view viewWithTag:111];

titleLabel.numberOfLines = 0;

titleLabel.hidden = YES;

}

呼叫方法（ps:使用2或3?你的需要啦～）

1:引入標頭檔案

2:[XX showEmptyWithTitle:@"掘金-Very good"];

3:[XX showEmptyTitle:@"掘金-Very good"];

runtime簡單使用-Empty-展示VC

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