IOS-加载动态图（gif）

 //
 //  BowenView.h
 //  IOS_0302_下拉刷新
 //
 //  Created by ma c on 16/3/2.
 //  Copyright © 2016年 博文科技. All rights reserved.
 //

 #import <UIKit/UIKit.h>

 @interface BowenView : UIView

 //要把loading界面加载到那个界面
 + (void)showBowenViewFromSuperView:(UIView *)superView;
 //要把loading界面从哪个界面移除
 + (void)removeBowenViewFromSuperView:(UIView *)superView;
 //要把loading界面加载到那个界面上（具体位置）
 + (void)showBowenViewFromSuperView:(UIView *)superView offSetY:(CGFloat)offSetY;

 @end

 //
 //  BowenView.m
 //  IOS_0302_下拉刷新
 //
 //  Created by ma c on 16/3/2.
 //  Copyright © 2016年 博文科技. All rights reserved.
 //

 #import "BowenView.h"

 @interface BowenView ()

 //动态图
 @property (nonatomic, strong) UIImageView *loadingImgView;
 //提示文字
 @property (nonatomic, strong) UILabel *lbl;

 @end

 @implementation BowenView

 - (instancetype)init
 {
     self = [super init];
     if (self) {
         [self addSubview:self.loadingImgView];
         [self addSubview:self.lbl];
     }
     return self;
 }

 - (UIImageView *)loadingImgView
 {
     if(!_loadingImgView){
         _loadingImgView = [[UIImageView alloc] init];
         _loadingImgView.frame = CGRectMake(, , , );
         _loadingImgView.backgroundColor = [UIColor clearColor];
         //动态图属性
         _loadingImgView.animationImages = [self getImageArray];
         _loadingImgView.animationDuration = 2.0;
         _loadingImgView.animationRepeatCount = ;
     }
     return _loadingImgView;
 }

 - (UILabel *)lbl
 {
     if(!_lbl){
         _lbl = [[UILabel alloc] init];
         _lbl.frame = CGRectMake(, , , );
         _lbl.text = @"正在加载...";
         _lbl.font = [UIFont systemFontOfSize:];
         _lbl.textColor = [UIColor darkGrayColor];
         _lbl.textAlignment = NSTextAlignmentCenter;
     }
     return _lbl;
 }
 //获取图片数组
 - (NSArray *)getImageArray
 {
     NSMutableArray *imgArray = [NSMutableArray array];
     NSMutableArray *imgNameArr = [NSMutableArray array];

     for (int i=; i<; i++) {

          NSString *imgName = [NSString stringWithFormat:@"loading_animate_%02d",i];
         [imgArray addObject:imgName];
     }

     for (int i = ; i < ; i ++) {
         UIImage *image = [UIImage imageNamed:[imgArray objectAtIndex:i]];
         [imgNameArr addObject:image];
     }
     return imgNameArr;

 }

 //要把loading界面加载到那个界面
 + (void)showBowenViewFromSuperView:(UIView *)superView
 {
     [self showBowenViewFromSuperView:superView offSetY:];
 }
 //要把loading界面从哪个界面移除
 + (void)removeBowenViewFromSuperView:(UIView *)superView
 {
     //在父视图的【所有子视图数组中】查找
     for (UIView *itemView in superView.subviews) {
         if ([itemView isKindOfClass:[BowenView class]]) {
             [itemView removeFromSuperview];
         }
     }
 }
 //要把loading界面加载到那个界面上（具体位置）
 + (void)showBowenViewFromSuperView:(UIView *)superView offSetY:(CGFloat)offSetY
 {
     BowenView *loadingView = [[BowenView alloc] init];
     loadingView.frame = CGRectMake([UIScreen mainScreen].bounds.size.width/ - ,  + offSetY, , );

     //判断superView上是否已经存在一个BowenView，如果已经存在，先删除，在加载新的View
     [self removeBowenViewFromSuperView:superView];
     [superView addSubview:loadingView];

     //让动态图动起来
     [loadingView.loadingImgView startAnimating];

 }

 @end