UIActivityIndicatorView 的使用

最新推荐文章于 2017-12-18 21:10:00 发布

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最新推荐文章于 2017-12-18 21:10:00 发布

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原文链接：http://www.cnblogs.com/tian-sun/p/4201373.html

本文详细介绍了如何在iOS应用中使用UIActivityIndicatorView创建动态加载效果，包括设置样式、颜色和自动隐藏机制，并通过按钮控制动画的开启和停止。

//
// UIActivityIndicator.m
// ToolBar
//
// Created by lanouhn on 15/1/3.
// Copyright (c) 2015年 niutiantian. All rights reserved.
//

#import "UIActivityIndicator.h"

@interface UIActivityIndicator ()
{
    UIActivityIndicatorView *activityView;
}
@end

@implementation UIActivityIndicator

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
//    UIActivityIndicatorView: 风火轮视图,作用是提醒用户正在加载数据

        //风火轮的样式
//    UIActivityIndicatorViewStyleWhiteLarge大型白色指示器
//    UIActivityIndicatorViewStyleWhite标准尺寸白色只指示器
//    UIActivityIndicatorViewStyleGray灰色指示器,用于白色背景

    activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    activityView.frame = CGRectMake(0, 0, 40, 40);
    activityView.center = self.view.center;
        //设置颜色
    activityView.color = [UIColor redColor];

        //指示器停止后自动隐藏
    activityView.hidesWhenStopped = YES;

    [self.view addSubview:activityView];
    [activityView release];

    UIButton *starButton = [UIButton buttonWithType:UIButtonTypeSystem];
    starButton.frame = CGRectMake(100, 100, 40, 40);
    [starButton setTitle:@"开始" forState:UIControlStateNormal];

    [starButton addTarget:self action:@selector(starAnimation) forControlEvents:UIControlEventTouchUpInside];


    [self.view addSubview:starButton];

    UIButton *stopButton = [UIButton buttonWithType:UIButtonTypeSystem];     stopButton.frame = CGRectMake(100, 160, 40, 40);     [stopButton setTitle:@"停止" forState:UIControlStateNormal];     [stopButton addTarget:self action:@selector(stopAnimation) forControlEvents:UIControlEventTouchUpInside];     [self.view addSubview:stopButton];      } - (void)starAnimation {     [activityView startAnimating];//开启动画 } - (void)stopAnimation {     [activityView stopAnimating];//关闭动画 } @end