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(0, 0, 80, 80);
        _loadingImgView.backgroundColor = [UIColor clearColor];
        //动态图属性
        _loadingImgView.animationImages = [self getImageArray];
        _loadingImgView.animationDuration = 2.0;
        _loadingImgView.animationRepeatCount = 0;
    }
    return _loadingImgView;
}

- (UILabel *)lbl
{
    if(!_lbl){
        _lbl = [[UILabel alloc] init];
        _lbl.frame = CGRectMake(0, 80, 80, 30);
        _lbl.text = @"正在加载...";
        _lbl.font = [UIFont systemFontOfSize:14];
        _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=1; i<16; i++) {
        
         NSString *imgName = [NSString stringWithFormat:@"loading_animate_%02d",i];
        [imgArray addObject:imgName];
    }
    
    for (int i = 0; i < 15; 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:0];
}
//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/2 - 40, 200 + offSetY, 100, 80);

    //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