iOS不得姐项目--封装状态栏指示器(UIWindow实现)

一.头文件

 #import <UIKit/UIKit.h>

 @interface ChaosStatusBarHUD : NSObject
 /** 显示成功信息 */
 + (void)showSuccess:(NSString *)str;
 /** 显示失败信息 */
 + (void)showError:(NSString *)str;
 /** 显示正在加载的信息 */
 + (void)showLoading:(NSString *)str;
 /** 隐藏 */
 + (void)hide;
 /** 显示纯文本 */
 + (void)showMessage:(NSString *)str;
 /** 自定义图标 文字 */
 + (void)showMessage:(NSString *)str withImage:(UIImage *)image;
 @end

二.实现.m文件

 #import "ChaosStatusBarHUD.h"

 #define ChaosWindowH 20
 #define ChaosScreenW [UIScreen mainScreen].bounds.size.width

 @implementation ChaosStatusBarHUD

 static NSTimer *timer_;
 static UIWindow *window_;

 + (void)showWindow
 {
     // 首先结束之前的定时器
     [timer_ invalidate];
     UIWindow *window = [[UIWindow alloc] init];
     window.backgroundColor = [UIColor blackColor];
     window.windowLevel = UIWindowLevelStatusBar;
     window.hidden = NO;
     window_ = window;
     window.frame = CGRectMake(, -ChaosWindowH, ChaosScreenW, ChaosWindowH);

     // 动画效果
     [UIView animateWithDuration:0.25 animations:^{

         window.frame = CGRectMake(, , ChaosScreenW, ChaosWindowH);
     }];
 }
 /** 自定义图标 文字 */
 + (void)showMessage:(NSString *)str withImage:(UIImage *)image
 {
     // 创建窗体
     [self showWindow];
     // 添加按钮
     UIButton *button = [[UIButton alloc] init];
     button.frame = window_.bounds;
     [button setImage:image forState:UIControlStateNormal];
     [button setTitle:str forState:UIControlStateNormal];
     button.titleEdgeInsets = UIEdgeInsetsMake(, , , );
     button.titleLabel.font = [UIFont systemFontOfSize:];
     [window_ addSubview:button];

     // 两秒后结束动画
     timer_ = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(hide) userInfo:nil repeats:NO];
 }

 /** 显示纯文本 */
 + (void)showMessage:(NSString *)str
 {
     [self showMessage:str withImage:nil];
 }

 /** 显示成功信息 */
 + (void)showSuccess:(NSString *)str
 {
     [self showMessage:str withImage:[UIImage imageNamed:@"success"]];
 }

 /** 显示失败信息 */
 + (void)showError:(NSString *)str
 {
     [self showMessage:str withImage:[UIImage imageNamed:@"error"]];
 }

 /** 显示正在加载的信息 */
 + (void)showLoading:(NSString *)str
 {
     // 停止定时器
     [timer_ invalidate];
     timer_ = nil;
     // 创建窗口
     [self showWindow];
     // 添加按钮
     UIButton *button = [[UIButton alloc] init];
     button.frame = window_.bounds;
     [button setTitle:str forState:UIControlStateNormal];
     button.titleLabel.font = [UIFont systemFontOfSize:];
     [window_ addSubview:button];
     // 计算按钮文字宽度
     CGFloat titleWidth = [str sizeWithAttributes:@{NSFontAttributeName : [UIFont systemFontOfSize:]}].width;
     // 计算菊花的X值
     CGFloat x = (ChaosScreenW -  * titleWidth) * 0.5;
     // 计算loadingView的Y值
     CGFloat y = window_.frame.size.height * 0.5;
     UIActivityIndicatorView *loadingView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
     [loadingView startAnimating];
     [window_ addSubview:loadingView];
     loadingView.center = CGPointMake(x, y);
 }

 /** 隐藏 */
 + (void)hide
 {
     // 动画效果
     [UIView animateWithDuration:0.25 animations:^{

         window_.frame = CGRectMake(, -, ChaosScreenW, ChaosWindowH);
     } completion:^(BOOL finished) {

         timer_ = nil;
         window_ = nil;
     }];
 }
 @end