本文实例为大家分享iOS自定义alertView提示框，先上图,弹框的背景色,按钮背景色,提示的消息的字体颜色都可以改变
利用单例实现丰富的自定义接口
// // PBAlertController.h // PBAlertDemo // // Created by 裴波波 on 16/4/20. // Copyright © 2016年 裴波波. All rights reserved. // #import <UIKit/UIKit.h> typedef void(^PBBlock)(); @interface PBAlertController : UIViewController /** 设置alertView背景色 */ @property (nonatomic, copy) UIColor *alertBackgroundColor; /** 设置确定按钮背景色 */ @property (nonatomic, copy) UIColor *btnConfirmBackgroundColor; /** 设置取消按钮背景色 */ @property (nonatomic, copy) UIColor *btnCancelBackgroundColor; /** 设置message字体颜色 */ @property (nonatomic, copy) UIColor *messageColor; /** 创建单例 */ +(instancetype)shareAlertController; /** 弹出alertView以及点击确定回调的block */ -(void)alertViewControllerWithMessage:(NSString *)message andBlock:(PBBlock) block; @end
.m文件中初始化控件以及对alertView的控件的属性进行懒加载,确定初始的颜色.
// // PBAlertController.m // PBAlertDemo // // Created by 裴波波 on 16/4/20. // Copyright © 2016年 裴波波. All rights reserved. // #import "PBAlertController.h" /** 屏幕尺寸 */ #define kMainScreenBounds [UIScreen mainScreen].bounds @interface PBAlertController () /** 蒙版 */ @property (nonatomic, strong) UIView *coverView; /** 弹框 */ @property (nonatomic, strong) UIView *alertView; /** 点击确定回调的block */ @property (nonatomic, copy) PBBlock block; @end @implementation PBAlertController - (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor whiteColor]; } -(void)alertViewControllerWithMessage:(NSString *)message andBlock:(PBBlock) block{ self.block = block; //创建蒙版 UIView * coverView = [[UIView alloc] initWithFrame:kMainScreenBounds]; self.coverView = coverView; [self.view addSubview:coverView]; coverView.backgroundColor = [UIColor blackColor]; coverView.alpha = 0.7; //创建提示框view UIView * alertView = [[UIView alloc] init]; alertView.backgroundColor = self.alertBackgroundColor; //设置圆角半径 alertView.layer.cornerRadius = 6.0; self.alertView = alertView; [self.view addSubview:alertView]; alertView.center = coverView.center; alertView.bounds = CGRectMake(0, 0, kMainScreenBounds.size.width * 0.75, kMainScreenBounds.size.width * 0.75 * 1.5/ 3); //创建操作提示 label UILabel * label = [[UILabel alloc] init]; [alertView addSubview:label]; label.text = @"操作提示"; label.font = [UIFont systemFontOfSize:19]; label.textAlignment = NSTextAlignmentCenter; CGFloat lblWidth = alertView.bounds.size.width; CGFloat lblHigth = 22; label.frame = CGRectMake(0, 0, lblWidth, lblHigth); //创建中间灰色分割线 UIView * separateLine = [[UIView alloc] init]; separateLine.backgroundColor = [UIColor grayColor]; [alertView addSubview:separateLine]; separateLine.frame = CGRectMake(0, lblHigth + 1, alertView.bounds.size.width, 1); //创建message label UILabel * lblMessage = [[UILabel alloc] init]; lblMessage.textColor = self.messageColor; [alertView addSubview:lblMessage]; lblMessage.text = message; lblMessage.textAlignment = NSTextAlignmentCenter; lblMessage.numberOfLines = 2; //最多显示两行Message CGFloat margin = 5; CGFloat msgX = margin; CGFloat msgY = lblHigth + 3; CGFloat msgW = alertView.bounds.size.width - 2 * margin; CGFloat msgH = 44; lblMessage.frame = CGRectMake(msgX, msgY, msgW, msgH); //创建确定 取消按钮 CGFloat buttonWidth = (alertView.bounds.size.width - 4 * margin) * 0.5; CGFloat buttonHigth = 25; UIButton * btnCancel = [[UIButton alloc] init]; [alertView addSubview:btnCancel]; [btnCancel setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; [btnCancel setTitle:@"取消" forState:UIControlStateNormal]; [btnCancel setBackgroundColor:self.btnCancelBackgroundColor]; btnCancel.frame = CGRectMake(margin, alertView.bounds.size.height - margin - buttonHigth, buttonWidth, buttonHigth); btnCancel.tag = 0; [btnCancel addTarget:self action:@selector(didClickBtnConfirm:) forControlEvents:UIControlEventTouchUpInside]; //确定按钮 UIButton * btnConfirm = [[UIButton alloc] init]; btnConfirm.tag = 1; [alertView addSubview:btnConfirm]; [btnConfirm setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; [btnConfirm setTitle:@"确定" forState:UIControlStateNormal]; [btnConfirm setBackgroundColor:self.btnConfirmBackgroundColor]; btnConfirm.frame = CGRectMake(alertView.bounds.size.width - margin - buttonWidth, alertView.bounds.size.height - margin - buttonHigth, buttonWidth, buttonHigth); [btnConfirm addTarget:self action:@selector(didClickBtnConfirm:) forControlEvents:UIControlEventTouchUpInside]; } /** 点击确定 or 取消触发事件 */ -(void)didClickBtnConfirm:(UIButton *)sender{ if (sender.tag == 0) { [self dismissViewControllerAnimated:YES completion:nil]; return; } self.block(); [self dismissViewControllerAnimated:YES completion:nil]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } static PBAlertController * instance = nil; +(instancetype)shareAlertController{ static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ instance = [[PBAlertController alloc] init]; }); return instance; } -(UIColor *)alertBackgroundColor{ if (_alertBackgroundColor == nil) { _alertBackgroundColor = [UIColor colorWithRed:249/255.0 green:249/255.0 blue:249/255.0 alpha:1]; } return _alertBackgroundColor; } /** 确定按钮背景色 */ -(UIColor *)btnConfirmBackgroundColor{ if (_btnConfirmBackgroundColor == nil) { _btnConfirmBackgroundColor = [UIColor orangeColor]; } return _btnConfirmBackgroundColor; } /** 取消按钮背景色 */ -(UIColor *)btnCancelBackgroundColor{ if (_btnCancelBackgroundColor == nil) { _btnCancelBackgroundColor = [UIColor blueColor]; } return _btnCancelBackgroundColor; } /** message字体颜色 */ -(UIColor *)messageColor{ if (_messageColor == nil) { _messageColor = [UIColor blackColor]; } return _messageColor; } @end
在需要调用的地方进行调用
// // ViewController.m // PBAlertDemo // // Created by 裴波波 on 16/4/20. // Copyright © 2016年 裴波波. All rights reserved. // #import "ViewController.h" #import "PBAlertController.h" @interface ViewController () @end @implementation ViewController //点击按钮弹出提示框 - (IBAction)clickShowAlertBtn:(id)sender { PBAlertController * alertVc = [PBAlertController shareAlertController]; alertVc.messageColor = [UIColor redColor]; [alertVc alertViewControllerWithMessage:@"这是一message沙哈" andBlock:^{ NSLog(@"点击确定后执行的方法"); }]; alertVc.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self presentModalViewController:alertVc animated:YES]; } @end
以上就是本文的全部内容，希望对大家学习iOS程序设计有所帮助。
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