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#import "ViewController.h"
@interface ViewController ()
{
UIActivityIndicatorView *activity;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *button1=[[UIButton alloc]initWithFrame:CGRectMake(50, 400, 100, 50)];
[button1 setTitle:@"开始" forState:UIControlStateNormal];
button1.backgroundColor=[UIColor orangeColor];
[button1 addTarget:self action:@selector(aa:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button1];
UIButton *button2=[[UIButton alloc]initWithFrame:CGRectMake(180, 400, 100, 50)];
[button2 setTitle:@"停止" forState:UIControlStateNormal];
button2.backgroundColor=[UIColor purpleColor];
[button2 addTarget:self action:@selector(bb:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];
activity=[[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
//设置 风格;
activity.activityIndicatorViewStyle=UIActivityIndicatorViewStyleWhiteLarge;
//设置活动指示器的颜色
activity.color=[UIColor redColor];
//hidesWhenStopped默认为YES，会隐藏活动指示器。要改为NO
/* activity.hidesWhenStopped=NO;
//启动
[activity startAnimating];
//停止
[activity stopAnimating];*/
[self.view addSubview:activity];
// Do any additional setup after loading the view, typically from a nib.
}
-(IBAction)aa:(id)sender
{
[activity startAnimating];
}
-(IBAction)bb:(id)sender
{
[activity stopAnimating];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
创建
UIActivityIndicatorView* activityIndicatorView = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(100,100,100,100)];
属性设置风格：
1.activityIndicatorView.activityIndicatorViewStyle= UIActivityIndicatorViewStyleGray;
系统给你提供了3种风格：
1)UIActivityIndicatorViewStyleWhiteLarge 大型白色指示器
2)UIActivityIndicatorViewStyleWhite 标准尺寸白色指示器
3)UIActivityIndicatorViewStyleGray 灰色指示器，用于白色背景
启动和停止
1.[activityIndicatorView startAnimating ];//启动
2.[activityIndicatorView stopAnimating ];//停止
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原文地址：http://www.cnblogs.com/YuanYe1/p/4620236.html
