专门做课件的网站,wordpress目录在哪里设置,大上海人才网,网站备案备案吗这里介绍一下网友开源的MBProgressHUD类#xff0c;实现等待框#xff0c; 一、网上下载 MBProgessHUD 类文件#xff0c;直接导入到工程即可 二、示例分析 在我的工程中示例如下#xff1a; 1#xff09;在ShowImageViewController.h头文件代码如下#xff1a; #import… 这里介绍一下网友开源的MBProgressHUD类实现等待框 一、网上下载 MBProgessHUD 类文件直接导入到工程即可 二、示例分析 在我的工程中示例如下 1在ShowImageViewController.h头文件代码如下 #import UIKit/UIKit.h #import MBProgressHUD.h interface ShowImageViewController : UIViewController MBProgressHUDDelegate{ NSString *_picUrlString; UIImageView *_imageView; MBProgressHUD *_progressHUD; } property (nonatomic, copy) NSString *picUrlString; property (nonatomic, retain) IBOutlet UIImageView *imageView; property (nonatomic, retain) MBProgressHUD *progressHUD; //请求图片资源 -(void)imageResourceRequest; //显示图片信息 -(void)displayImage:(UIImage *)image; - (IBAction)dismissModealView:(id)sender; -(void)removeModalView; end 2在ShowImageViewController.m实现文件代码如下 #import ShowImageViewController.h #import QuartzCore/QuartzCore.h implementation ShowImageViewController synthesize picUrlString _picUrlString; synthesize imageView _imageView; synthesize progressHUD _progressHUD; - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view from its nib. self.view.backgroundColor [UIColor grayColor]; self.view.alpha 0.8; //设置图片为圆角 self.imageView.backgroundColor [UIColor clearColor]; self.imageView.layer.borderColor [UIColor lightGrayColor].CGColor; self.imageView.layer.borderWidth 5.0; self.imageView.layer.masksToBounds YES; self.imageView.layer.cornerRadius 10.0; } -(void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; //当进入视图时重新设置imageView [self.imageView setImage:nil]; [self.imageView setFrame:CGRectMake(160, 200, 0, 0)]; //显示加载等待框 self.progressHUD [[MBProgressHUD alloc] initWithView:self.view]; [self.view addSubview:self.progressHUD]; [self.view bringSubviewToFront:self.progressHUD]; self.progressHUD.delegate self; self.progressHUD.labelText 加载中...; [self.progressHUD show:YES]; //开启线程请求图片资源 [NSThread detachNewThreadSelector:selector(imageResourceRequest) toTarget:self withObject:nil]; } //请求图片资源 -(void)imageResourceRequest { NSAutoreleasePool *pool [[NSAutoreleasePool alloc] init]; //根据网络数据获得到image资源 NSData *data [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:self.picUrlString]]; UIImage *image [[UIImage alloc] initWithData:data]; [data release]; //回到主线程显示图片信息 [self performSelectorOnMainThread:selector(displayImage:) withObject:image waitUntilDone:NO]; [image release]; [pool release]; } //显示图片信息 -(void)displayImage:(UIImage *)image { //若self.progressHUD为真则将self.progressHUD移除设为nil if (self.progressHUD){ [self.progressHUD removeFromSuperview]; [self.progressHUD release]; self.progressHUD nil; } //图片慢慢放大动画效果 [self.imageView setImage:image]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.5]; [self.imageView setFrame:CGRectMake(40, 100, 240, 160)]; [UIView commitAnimations]; } - (void)viewDidUnload { [self setImageView:nil]; [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet nil; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation UIInterfaceOrientationPortrait); } - (IBAction)dismissModealView:(id)sender { //设置定时器当动画结束时子视图从父视图中移除 [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:selector(removeModalView) userInfo:nil repeats:NO]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.5]; [self.imageView setFrame:CGRectMake(160, 200, 0, 0)]; [UIView commitAnimations]; } -(void)removeModalView { [self.view removeFromSuperview]; } #pragma mark - #pragma mark MBProgressHUDDelegate methods - (void)hudWasHidden:(MBProgressHUD *)hud { NSLog(Hud: %, hud); // Remove HUD from screen when the HUD was hidded [self.progressHUD removeFromSuperview]; [self.progressHUD release]; self.progressHUD nil; } - (void)dealloc { [_picUrlString release]; [_imageView release]; [super dealloc]; } end 三、效果展示 四、总结 利用MBProgressHUD实现加载等待框视觉效果大大提高 转载于:https://www.cnblogs.com/snake-hand/archive/2012/08/13/2636219.html
