MPProgressHUD是一个非常好用的进度指示器类库，其提供了苹果官方sdk没有提供的progress indicator接口，且提供多种样式，使用方法简便。
首先将类库文件添加到项目中。
使用实例代码如下：
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#import <UIKit/UIKit.h>
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#import "MBProgressHUD.h"
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#import <libkern/OSAtomic.h>
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@interface SampleViewController : UITableViewController <MBProgressHUDDelegate>
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@property (nonatomic, retain) NSCondition* condition;
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@property (nonatomic, retain) MBProgressHUD* hud;
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@end
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static volatile NSInteger WAITING_RESPONSE_FOR_SERVERRESPONSE = 0;
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- (void) popOutMBProgressHUD;
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- (void) selectorForMPProgressHUD;
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- (void) notifyMPProgressHUDToDisappear;
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@implementation SampleViewController
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@synthesize hud = _hud;
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@synthesize condition = _condition;
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- (id) initWithCoder:(NSCoder *)aDecoder
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{
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self = [super initWithCoder: aDecoder];
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if (self != nil) {
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_hud = nil;
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_condition = [[NSCondition alloc] init];
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}
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return self;
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}
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- (void) dealloc
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{
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[_hud release];
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[_condition release];
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}
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- (void) popOutMBProgressHUD
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{
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MBProgressHUD* tempHud = [[MBProgressHUD alloc] initWithView:self.navigationController.view];
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self.hud = tempHud;
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[self.navigationController.view addSubview: tempHud];
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self.hud.dimBackground = YES;
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self.hud.delegate = self;
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self.hud.labelText = @"正在处理";
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[self.hud showWhileExecuting:@selector(selectorForMPProgressHUD) onTarget:self withObject: nil animated:YES];
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[tempHud release];
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}
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- (void) selectorForMPProgressHUD
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{
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OSAtomicCompareAndSwapInt(0,
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1,
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&WAITING_RESPONSE_FOR_SERVERRESPONSE);
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[self performSelectorInBackground: @selector(tempSelector) withObject: nil];
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[self.condition lock];
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while (OSAtomicCompareAndSwapInt(1,
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1,
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&WAITING_RESPONSE_FOR_SERVERRESPONSE)) {
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NSDate* timeOutDate = [NSDate dateWithTimeIntervalSinceNow: 5.0f];
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[self.condition waitUntilDate: timeOutDate];
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}
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[self.condition unlock];
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}
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- (void) notifyMPProgressHUDToDisappear
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{
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[self.condition lock];
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OSAtomicCompareAndSwapInt(1,
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0,
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&WAITING_RESPONSE_FOR_SERVERRESPONSE);
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[self.condition signal];
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[self.condition unlock];
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}
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- (void)hudWasHidden:(MBProgressHUD *)hud
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{
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[self.hud removeFromSuperview];
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self.hud = nil;
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}
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- (void) tempSelector
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{
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sleep(3.0f);
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[self notifyMPProgressHUDToDisappear];
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}
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@end
开源类库之三（MPProgressHUD）
原文：http://blog.csdn.net/hnjyzqq/article/details/43328383
