【转】提示框第三方库之MBProgressHUD iOS toast效果 动态提示框效果

原文网址：http://www.zhimengzhe.com/IOSkaifa/37910.html

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： 
 
以上就简单介绍了MBProgressHUD的使用，这里都是采用block的形式来操作的，这样写起代码来更直观也更高效。

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