iOS自定义加载等待视图-MBProgressHUD

MBProgressHUD是一个开源项目，实现了很多种样式的提示框，使用上简单、方便，并且可以对显示的内容进行自定义，功能很强大，很多项目中都有使用到。到GitHub上可以下载到项目源码https://github.com/jdg/MBProgressHUD，下载下来后直接把MBProgressHUD.h和MBProgressHUD.m拖入工程中就行，别忘了选择拷贝到工程。完了在需要使用的地方导入头文件就可以开始使用了。首先看下工程截图：

                                                                

接下来是整个Demo的完整界面，这里我只选择出了几个常用的对话框，其他样式的在源码提供的Demo里可以找到，要用的话直接参考就可以。

                                                                         

接下来直接上代码了，头文件部分：

 #import <UIKit/UIKit.h>
 #import "MBProgressHUD.h"

 @interface ViewController : UIViewController
 {
     //HUD（Head-Up Display，意思是抬头显示的意思）
     MBProgressHUD *HUD;
 }

 - (IBAction)showTextDialog:(id)sender;
 - (IBAction)showProgressDialog:(id)sender;
 - (IBAction)showProgressDialog2:(id)sender;
 - (IBAction)showCustomDialog:(id)sender;
 - (IBAction)showAllTextDialog:(id)sender;

 @end

实现文件（按钮实现部分）：

 - (IBAction)showTextDialog:(id)sender {
     //初始化进度框，置于当前的View当中
     HUD = [[MBProgressHUD alloc] initWithView:self.view];
     [self.view addSubview:HUD];

     //如果设置此属性则当前的view置于后台
     HUD.dimBackground = YES;

     //设置对话框文字
     HUD.labelText = @"请稍等";

     //显示对话框
     [HUD showAnimated:YES whileExecutingBlock:^{
         //对话框显示时需要执行的操作
         sleep(3);
     } completionBlock:^{
         //操作执行完后取消对话框
         [HUD removeFromSuperview];
         [HUD release];
         HUD = nil;
     }];
 }

 - (IBAction)showProgressDialog:(id)sender {
     HUD = [[MBProgressHUD alloc] initWithView:self.view];
     [self.view addSubview:HUD];
     HUD.labelText = @"正在加载";

     //设置模式为进度框形的
     HUD.mode = MBProgressHUDModeDeterminate;
     [HUD showAnimated:YES whileExecutingBlock:^{
         float progress = 0.0f;
         while (progress < 1.0f) {
             progress += 0.01f;
             HUD.progress = progress;
             usleep(50000);
         }
     } completionBlock:^{
         [HUD removeFromSuperview];
         [HUD release];
         HUD = nil;
     }];
 }

 - (IBAction)showProgressDialog2:(id)sender {
     HUD = [[MBProgressHUD alloc] initWithView:self.view];
     [self.view addSubview:HUD];
     HUD.labelText = @"正在加载";
     HUD.mode = MBProgressHUDModeAnnularDeterminate;

     [HUD showAnimated:YES whileExecutingBlock:^{
         float progress = 0.0f;
         while (progress < 1.0f) {
             progress += 0.01f;
             HUD.progress = progress;
             usleep(50000);
         }
     } completionBlock:^{
         [HUD removeFromSuperview];
         [HUD release];
         HUD = nil;
     }];
 }

 - (IBAction)showCustomDialog:(id)sender {
     HUD = [[MBProgressHUD alloc] initWithView:self.view];
     [self.view addSubview:HUD];
     HUD.labelText = @"操作成功";
     HUD.mode = MBProgressHUDModeCustomView;
     HUD.customView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Checkmark"]] autorelease];
     [HUD showAnimated:YES whileExecutingBlock:^{
         sleep(2);
     } completionBlock:^{
         [HUD removeFromSuperview];
         [HUD release];
         HUD = nil;
     }];

 }

 - (IBAction)showAllTextDialog:(id)sender {
     HUD = [[MBProgressHUD alloc] initWithView:self.view];
     [self.view addSubview:HUD];
     HUD.labelText = @"操作成功";
     HUD.mode = MBProgressHUDModeText;

     //指定距离中心点的X轴和Y轴的偏移量，如果不指定则在屏幕中间显示
 //    HUD.yOffset = 150.0f;
 //    HUD.xOffset = 100.0f;

     [HUD showAnimated:YES whileExecutingBlock:^{
         sleep(2);
     } completionBlock:^{
         [HUD removeFromSuperview];
         [HUD release];
         HUD = nil;
     }];
 }

依次实现的效果如下：

                          

                          

下面这个效果就类似Android中的Toast：