MBProgressHUD等待指示器

第三方的等待指示器，MBProgressHUD就是第三方提供的等待指示器框架。下面是MBProgressHUD提供的等待指示器样式，它们基 本可以分为：未知结束时间和已知结束时间两大类等待指示器，在MBProgressHUD中可以为等待指示器添加标签和详细标签

原文：http://www.it165.net/pro/html/201304/5349.html











MBProgressHUD的下载地址是https://github.com/matej/MBProgressHUD，我们将下载的源 文件中的MBProgressHUD.h和MBProgressHUD.m拷贝到自己的工程中，MBProgressHUD依赖的框架 有：Foundation.framework、UIKit.framework和CoreGraphics.framework，我们需要将这些框架添 加到工程中。

我们为应用添加MBProgressHUD等待指示器，修改主视图控制器MasterViewController.m的startRequest方法代码如下，注意加粗部分：

view
sourceprint?

001.

-(

void

)startRequest

002.

003.

{

004.

005.

//初始化MBProgressHUD

006.

007.

MBProgressHUD
 *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];

008.

009.

hud.mode
 = MBProgressHUDModeCustomView;

010.

011.

hud.labelText
 = @”Loading”;

012.

013.

NSString
 *strURL = [[NSString alloc]

014.

015.

initWithFormat:@”http:

//iosbook3/mynotes/webservice.php”];

016.

017.

NSURL
 *url = [NSURL URLWithString:[strURL URLEncodedString]];

018.

019.

NSString
 *post;

020.

021.

if

(action
 == ACTION_QUERY) {

//查询处理

022.

023.

post
 = [NSString stringWithFormat:@

"email=%@&type=%@&action=%@"

,

024.

025.

@

"<你的iosbook1.com用户邮箱>"

,@

"JSON"

,@

"query"

];

026.

027.

}

else

if

(action
 == ACTION_REMOVE) {

//删除处理

028.

029.

NSIndexPath
 *indexPath = [self.tableView indexPathForSelectedRow];

030.

031.

NSMutableDictionary* 
 dict = self.listData[indexPath.row];

032.

033.

post
 = [NSString stringWithFormat:@

"email=%@&type=%@&action=%@&id=%@"

,

034.

035.

@

"<你的iosbook1.com用户邮箱>"

,@

"JSON"

,@

"remove"

,[dict
 objectForKey:@

"ID"

]];

036.

037.

}

038.

039.

NSData
 *postData  = [post dataUsingEncoding:NSUTF8StringEncoding];

040.

041.

NSMutableURLRequest
 *request = [NSMutableURLRequest requestWithURL:url];

042.

043.

[request
 setHTTPMethod:@

"POST"

];

044.

045.

[request
 setHTTPBody:postData];

046.

047.

NSURLConnection
 *connection = [[NSURLConnection alloc]

048.

049.

initWithRequest:request
 delegate:self];

050.

051.

if

(connection)
 {

052.

053.

_datas
 = [NSMutableData

new

];

054.

055.

}

056.

057.

}

058.

059.

-(

void

)
 connection:(NSURLConnection *)connection didFailWithError: (NSError *)error {

060.

061.

NSLog(@”%@”,[error
 localizedDescription]);

062.

063.

[MBProgressHUD
 hideHUDForView:self.view animated:YES];

064.

065.

}

066.

067.

068.

069.

-
 (

void

)
 connectionDidFinishLoading: (NSURLConnection*) connection {

070.

071.

NSLog(@”请求完成…”);

072.

073.

NSDictionary*
 dict = [NSJSONSerialization JSONObjectWithData:_datas

074.

075.

options:NSJSONReadingAllowFragments
 error:nil];

076.

077.

if

(action
 == ACTION_QUERY) {

//查询处理
 www.it165.net

078.

079.

[self
 reloadView:dict];

080.

081.

}

else

if

(action
 == ACTION_REMOVE) {

//删除处理

082.

083.

NSString
 *message = @”操作成功。”;

084.

085.

NSNumber
 *resultCodeObj = [dict objectForKey:@

"ResultCode"

];

086.

087.

if

([resultCodeObj
 integerValue] <

0

)
 {

088.

089.

message
 = [resultCodeObj errorMessage];

090.

091.

}

092.

093.

UIAlertView
 *alertView = [[UIAlertView alloc] initWithTitle:@”提示信息”

094.

095.

message:message

096.

097.

delegate:nil

098.

099.

cancelButtonTitle:@”OK”

100.

101.

otherButtonTitles:
 nil];

102.

103.

[alertView
 show];

104.

105.

//重新查询

106.

107.

action
 = ACTION_QUERY;

108.

109.

[self
 startRequest];

110.

111.

}

112.

113.

[MBProgressHUD
 hideHUDForView:self.view animated:YES];

114.

115.

}