(20160601)开源第三方学习之SVProgressHUD - iOS

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(20160601)开源第三方学习之SVProgressHUD(三)

2017-10-13 10:23:42 【大中小】浏览:2299次

Tags：20160601 开源第三方习之 SVProgressHUD

NSString *name; @property(nonatomic,assign) NSUInteger age; - (instancetype)init NS_UNAVAILABLE; - (instancetype)initWithName:(NSString *)name age:(NSUInteger)age; @end

b:属性后面加UI_APPEARANCE_SELECTOR表示这个是影响全局

@property (assign, nonatomic) SVProgressHUDStyle defaultStyle UI_APPEARANCE_SELECTOR;                   // default is SVProgressHUDStyleLight
@property (assign, nonatomic) SVProgressHUDMaskType defaultMaskType UI_APPEARANCE_SELECTOR;             // default is SVProgressHUDMaskTypeNone
@property (assign, nonatomic) SVProgressHUDAnimationType defaultAnimationType UI_APPEARANCE_SELECTOR;   // default is SVProgressHUDAnimationTypeFlat
@property (assign, nonatomic) CGSize minimumSize UI_APPEARANCE_SELECTOR;            // default is CGSizeZero, can be used to avoid resizing for a larger message

2.2 关键字extern 用于修饰常量可以让外面的引用文件应用

在头文件中使用extern来声明全局常量，并在相关实现文件中定义其值，这种常量要出现在全局符号表中，所以其名称应加以区别，通常用与之相关的类名做前缀；

在SVProgressHUD.h文件中定义的这些const

extern NSString * const SVProgressHUDDidReceiveTouchEventNotification;
extern NSString * const SVProgressHUDDidTouchDownInsideNotification;
extern NSString * const SVProgressHUDWillDisappearNotification;
extern NSString * const SVProgressHUDDidDisappearNotification;
extern NSString * const SVProgressHUDWillAppearNotification;
extern NSString * const SVProgressHUDDidAppearNotification;
extern NSString * const SVProgressHUDStatusUserInfoKey;

@interface SVProgressHUD : UIView
@end

然后在SVProgressHUD.m

NSString * const SVProgressHUDDidReceiveTouchEventNotification = @"SVProgressHUDDidReceiveTouchEventNotification";
NSString * const SVProgressHUDDidTouchDownInsideNotification = @"SVProgressHUDDidTouchDownInsideNotification";
NSString * const SVProgressHUDWillDisappearNotification = @"SVProgressHUDWillDisappearNotification";
NSString * const SVProgressHUDDidDisappearNotification = @"SVProgressHUDDidDisappearNotification";
NSString * const SVProgressHUDWillAppearNotification = @"SVProgressHUDWillAppearNotification";
NSString * const SVProgressHUDDidAppearNotification = @"SVProgressHUDDidAppearNotification";
NSString * const SVProgressHUDStatusUserInfoKey = @"SVProgressHUDStatusUserInfoKey";


@interface SVProgressHUD ()
@end

就可以在其它地方进行运用：

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleNotification:)
                                                 name:SVProgressHUDWillAppearNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleNotification:)
                                                 name:SVProgressHUDDidAppearNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleNotification:)
                                                 name:SVProgressHUDWillDisappearNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(handleNotification:)
                                                 name:SVProgressHUDDidDisappearNotification
                                               object:nil];
}

- (void)handleNotification:(NSNotification *)notification {
    NSLog(@"Notification recieved: %@", notification.name);
    NSLog(@"Status user info key: %@", no

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