第三方库MBProgressHUD的使用
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
#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:^{
floatprogress = 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:^{
floatprogress = 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。
