SVProgressHUD

原文：http://cht005288201307234627.iteye.com/blog/1927961

SVProgressHUD和MBProgressHUD效果差不多，不过不需要使用协议，同时也不需要声明实例。
直接通过类方法进行调用即可：

[SVProgressHUD method];

可以使用一下方法显示状态：

+ (void)show;

+ (void)showWithMaskType:(SVProgressHUDMaskType)maskType;

+ (void)showWithStatus:(NSString*)status;

+ (void)showWithStatus:(NSString*)status maskType:(SVProgressHUDMaskType)maskType;

// stops the activity indicator, shows a glyph + status, and dismisses HUD 1s later

//+ (void)showStringWithNoIndicator:(NSString *)status;

+ (void)showSuccessWithStatus:(NSString*)string;

+ (void)showSuccessWithStatusNoAutoDismiss:(NSString *)string;

+ (void)showErrorWithStatusNoAutoDismiss:(NSString *)string;

+ (void)showErrorWithStatus:(NSString *)string;

+ (void)showImage:(UIImage*)image status:(NSString*)status; // use 28x28 white pngs