在状态栏上做渐变动画效果

效果

说明

1. 在状态栏上显示信息并覆盖状态栏信息需要技巧

2. 本设计支持外部消息view的定制,只需要实现规定的协议方法即可

源码

https://github.com/YouXianMing/StatusBarMessage

//
//  StatusMessage.h
//  StatusBarView
//
//  Created by YouXianMing on 15/7/24.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "StatusMessageProtocol.h"

@interface StatusMessage : UIView

/**
 *  显示加载的view
 *
 *  @param view     实现了StatusMessageProtocol的view
 *  @param duration 动画显示时间
 */
+ (void)showWithView:(UIView <StatusMessageProtocol> *)view duration:(NSTimeInterval)duration;

/**
 *  隐藏加载的view
 *
 *  @param duration 隐藏动画显示时间
 */
+ (void)hideWithDuration:(NSTimeInterval)duration;

///////////////////////////////////////////////////////////////////////////////////////////////////

/**
 *  设置显示以及隐藏的动画时间(不设置,默认为1s)
 *
 *  @param duration 动画时间
 */
+ (void)showAndHideDuration:(NSTimeInterval)duration;

/**
 *  显示view,然后几秒后隐藏
 *
 *  @param view    实现了StatusMessageProtocol的view
 *  @param seconds 延时几秒后隐藏
 */
+ (void)showWithView:(UIView<StatusMessageProtocol> *)view hideAfterSeconds:(NSTimeInterval)seconds;

@end

//
//  StatusMessage.m
//  StatusBarView
//
//  Created by YouXianMing on 15/7/24.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "StatusMessage.h"

#define  Status_Message  @"StatusMessage"

static UIWindow        *_statusWindow      = nil;
static NSMapTable      *_weakDictionary    = nil;
static NSTimeInterval   _animationDuration = 1.f;

@implementation StatusMessage

+ (void)initialize {

    if (self == [StatusMessage class]) {

        _weakDictionary = [NSMapTable strongToWeakObjectsMapTable];

        _statusWindow                        = [[UIWindow alloc] initWithFrame:STATUS_BAR_FRAME];
        _statusWindow.windowLevel            = UIWindowLevelStatusBar + 1;
        _statusWindow.userInteractionEnabled = NO;
        [_statusWindow makeKeyAndVisible];
    }
}

+ (void)showWithView:(UIView <StatusMessageProtocol> *)view duration:(NSTimeInterval)duration {

    [_weakDictionary setObject:view forKey:Status_Message];
    [_statusWindow addSubview:view];
    [view showWithDuration:duration];
}

+ (void)hideWithDuration:(NSTimeInterval)duration {

    UIView <StatusMessageProtocol> *tmpView = [_weakDictionary objectForKey:Status_Message];
    [tmpView hideWithDuration:duration];
}

+ (void)showAndHideDuration:(NSTimeInterval)duration {

    _animationDuration = duration;
}

+ (void)showWithView:(UIView<StatusMessageProtocol> *)view hideAfterSeconds:(NSTimeInterval)seconds {

    [_weakDictionary setObject:view forKey:Status_Message];
    [_statusWindow addSubview:view];
    [view showWithDuration:_animationDuration];

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, seconds * NSEC_PER_SEC), dispatch_get_main_queue(), ^{

        UIView <StatusMessageProtocol> *tmpView = [_weakDictionary objectForKey:Status_Message];
        [tmpView hideWithDuration:_animationDuration];
    });
}

@end

//
//  StatusMessageProtocol.h
//  StatusBarView
//
//  Created by YouXianMing on 15/7/24.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>

/**
 *  状态栏的frame值
 */
#define  STATUS_BAR_FRAME  [[UIApplication sharedApplication] statusBarFrame]

@protocol StatusMessageProtocol <NSObject>

@required
/**
 *  显示动画
 *
 *  @param seconds 显示持续时间
 */
- (void)showWithDuration:(NSTimeInterval)seconds;

/**
 *  隐藏动画(隐藏动画的时候请移除掉自己)
 *
 *  @param seconds 隐藏持续时间
 */
- (void)hideWithDuration:(NSTimeInterval)seconds;

@end