【代码笔记】浇花动画

一，效果图。

二，工程图。

三，代码。

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController { NSTimer *timer; int i; } @end

 

RootViewController.m

- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. //初始化背景图
 [self initBackGroundView]; } #pragma -mark -functions
//背景图
-(void)initBackGroundView { //人
    UIImageView *loadPeopleView = [[UIImageView alloc] initWithFrame:CGRectMake(130, 100, 156, 172)]; loadPeopleView.tag = 101; loadPeopleView.alpha = 1.0f; loadPeopleView.backgroundColor=[UIColor clearColor]; [loadPeopleView setImage:[UIImage imageNamed:@"problem_load.png"]]; //花
    UIImageView *loadFlowerView = [[UIImageView alloc] initWithFrame:CGRectMake(70, 200, 62, 75)]; loadFlowerView.tag = 102; loadFlowerView.alpha = 1.0f; [loadFlowerView setImage:[UIImage imageNamed:@"problem_load1.png"]]; [self.view addSubview:loadPeopleView]; [self.view addSubview:loadFlowerView]; timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(animation:) userInfo:nil repeats:YES]; } //动画
- (void)animation:(NSTimer *)timer { NSLog(@"-i-%i--",i); UIImageView *imageView = (UIImageView *)[self.view viewWithTag:102]; i++; if (i%3 == 0) { [imageView setImage:[UIImage imageNamed:@"problem_load1.png"]]; }else if (i%3 == 1){ [imageView setImage:[UIImage imageNamed:@"problem_load2.png"]]; }else{ [imageView setImage:[UIImage imageNamed:@"problem_load3.png"]]; } }