提示框第三方库之MBProgressHUD
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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:
[cpp] view plaincopy
- #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):
[cpp] view plaincopy
- - (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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