【代码笔记】等待动画

一，效果图。

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.
}