帧动画的应用------自己在用的时候写了 估计一些刚入门的可能还不会用，就写出来留给大家使用

#import "ViewController.h"

#define  ScreenWidth [[UIScreen mainScreen]bounds].size.width

#define  ScreenHeight [[UIScreen mainScreen]bounds].size.height

@interface
ViewController ()

{

    UIImageView *_fireImage;

    UIButton *_pauseButton;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [super
viewDidLoad];

    

    //  创建火焰背景

    _fireImage=[[UIImageView
alloc] initWithFrame:CGRectMake(0,0,320,480)];

    _fireImage.image=[UIImage
imageNamed:@"fire.png"];

    [self.view
addSubview:_fireImage];

    

    

    //  创建火焰数组

    NSMutableArray *imageArray=[[NSMutableArray
alloc]
init];

    //for循环向数组中添加 UIImage类型的对象

    for(int i=0;i<2;i++)

    {

        //获得图片名称

        NSString *imageName=[NSString
stringWithFormat:

                             @"loading%d.png",i];

        UIImage *imageFire=[UIImage
imageNamed:imageName];

        [imageArray addObject:imageFire];

    }

    

    

    _fireImage.animationDuration=0.5;

    _fireImage.animationImages=imageArray;

    [_fireImage
startAnimating];

    

    

    _pauseButton=[UIButton
buttonWithType:UIButtonTypeSystem];

    _pauseButton.frame=CGRectMake(20,20,30,20);

    [_pauseButton
setTitle:@"暂停"
forState:UIControlStateNormal

     ];

    [_pauseButton
addTarget:self
action:@selector(pauseClick)
forControlEvents:UIControlEventTouchUpInside];

    [self.view
addSubview:_pauseButton];

}

- (void)pauseClick

{

    NSLog(@"调用了");

    //static bool isStop=NO;

    //isStop=!isStop;

   
//  isAnimating判断当前是否正在动画
；如果
是，停止动画；否则，开始动画

    bool result=[_fireImage
isAnimating];

    if(result)

    {

       
//停止动画 
；停止的时候，显示的图片是 _fireView最初赋值的图片

       
//与Timer区别在于，Timer停止时显示最后一张照片，而帧动画停止时显示最初赋值的照片

        [_fireImage
stopAnimating];

        [_pauseButton
setTitle:@"开始"
forState:UIControlStateNormal];

    }

    else

    {

        [_fireImage
startAnimating];

        [_pauseButton
setTitle:@"暂停"
forState:UIControlStateNormal];

    }

}