IOS开发学习笔记-(3) 进度条、等待动画开始停止

本文链接：https://blog.youkuaiyun.com/jiangtao_st/article/details/38192045

一、创建对应空间视图，如下图：

二、编写对应的 .h 代码，如下：

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController



@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *activWaitNetWork;

@property (weak, nonatomic) IBOutlet UIProgressView *pgrsDownLoad;

@property (weak,nonatomic) NSTimer *timer;


- (IBAction)onclickStartRequest:(id)sender;

- (IBAction)onclickDownLoad:(id)sender;

@end

三、编写对应的 .m 文件的实现，注释比较详细：

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize activWaitNetWork;
@synthesize pgrsDownLoad;
@synthesize timer;

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
}

- (IBAction)onclickStartRequest:(id)sender{
    
    //如果正在运行，停止； 否则 开始运行加载
    if ([activWaitNetWork isAnimating]) {
       [activWaitNetWork stopAnimating];
    }else{
       [activWaitNetWork startAnimating];
    }
}

- (IBAction)onclickDownLoad:(id)sender{
    
    //重新开始进度
    pgrsDownLoad.progress = 0;
    
    //定时任务 跟新 Progerss 的进度
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(update) userInfo:nil repeats:YES];
    
}

- (void)update{
    
    pgrsDownLoad.progress =  pgrsDownLoad.progress + 0.1 ;
    //当进度完成时，提示下载完成
    if(pgrsDownLoad.progress == 1){
        [timer invalidate];
        
        UIAlertView *alert  = [[UIAlertView alloc] initWithTitle:@"温馨提示" message:@"文件下载完成" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"取消", nil ];
        
        [alert show];
    }
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}




@end

四、运行效果，如下：