UI2_UISwitch与UIActivity

//
//  ViewController.m
//  UI2_UISwitch与UIActivity
//
//  Created by zhangxueming on 15/7/7.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//
 
#import "ViewController.h"
 
@interface ViewController ()
 
@end
 
@implementation ViewController
 
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //开关的尺寸固定大小(51*31)
    UISwitch *sw = [[UISwitch alloc] initWithFrame:CGRectMake(100, 200, 0, 0)];
    NSLog(@"sw = %@", sw);
    sw.thumbTintColor = [UIColor redColor];
    sw.tintColor = [UIColor blueColor];
    sw.onTintColor = [UIColor yellowColor];
    [sw addTarget:self action:@selector(swichValueChanged:) forControlEvents:UIControlEventValueChanged];
    //动画打开开关
    [sw setOn:YES animated:YES];
    [self.view addSubview:sw];
 
    //活动指示器
    UIActivityIndicatorView * indicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    [self.view addSubview:indicatorView];
    indicatorView.center = self.view.center;
    [indicatorView startAnimating];
    indicatorView.tag =100;
    self.view.backgroundColor = [UIColor blackColor];
}
 
- (void)swichValueChanged:(UISwitch *)sw
{
    NSLog(@"sw value = %i", sw.on);
    UIActivityIndicatorView *indicator = (UIActivityIndicatorView *)[self.view viewWithTag:100];
    if (sw.isOn) {
        [indicator startAnimating];
    }
    else{
        [indicator stopAnimating];
    }
}
 
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
 
@end