【代码笔记】等待动画

一，效果图。

images/loading.gif' data-original="http://images2015.cnblogs.com/blog/337518/201510/337518-20151014151617194-1325104342.jpg" width="218" height="400" />

二，工程图。

三，代码。

RootViewController.h

#import <UIKit/UIKit.h>@interface RootViewController : UIViewController{  NSTimer *timerWait;  int j;}@end

RootViewController.m

#import "RootViewController.h"@interface RootViewController ()@end@implementation RootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];  if (self) {    // Custom initialization  }  return self;}- (void)viewDidLoad{  [super viewDidLoad];  // Do any additional setup after loading the view.    //初始化背景图  [self initBackGroundView];   }#pragma -mark -functions//初始化背景图-(void)initBackGroundView{  UIImageView *waitView = [[UIImageView alloc] initWithFrame:CGRectMake(50, 200, 130, 160)];  waitView.tag = 103;  [waitView setImage:[UIImage imageNamed:@"wait1.png"]];  [self.view addSubview:waitView];    timerWait = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(wait) userInfo:nil repeats:YES];}//等待函数- (void)wait{  UIImageView *imageView = (UIImageView *)[self.view viewWithTag:103];  if (j%4 == 0) {    [imageView setImage:[UIImage imageNamed:@"wait1.png"]];  }else if(j%11 == 0){    [imageView setImage:[UIImage imageNamed:@"wait4.png"]];  }else if(j%17 == 0){    imageView.frame = CGRectMake(-10, 215, 170, 145);    [imageView setImage:[UIImage imageNamed:@"wait3.png"]];  }else{    [imageView setImage:[UIImage imageNamed:@"wait2.png"]];  }  j++;}- (void)didReceiveMemoryWarning{  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}

原标题：【代码笔记】等待动画

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