iOS开发——UIAlertController
iOS8之后，UIAlertView和UIActionSheet被干掉了，取而代之的是UIAlertController和UIAlertAction。
UIAlertController有两种样式，一个是UIAlertControllerStyleAlert，就是以前的UIAlertView，还有一个就是UIAlertControllerStyleActionSheet，也就是以前的UIActionSheet。UIAlertControllerStyleAlert模式中可以加输入框，UIAlertControllerStyleActionSheet不行。为了更像点样子，我设置文本框有输入才能点击确定。
废话不多说，上代码：
//
// ViewController.m
// Demo-hehehe
//
// Created by yyt on 16/4/21.
// Copyright © 2016年 yyt. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()<UIAlertViewDelegate>
@property(nonatomic,strong) UITextField *myTextField;
@property(nonatomic,strong) UIAlertAction *otherAction;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *alertButton = [UIButton buttonWithType:UIButtonTypeSystem];
alertButton.frame = CGRectMake(40, 140, 200, 40);
alertButton.backgroundColor = [UIColor orangeColor];
[alertButton setTitle:@"AlertButton" forState:UIControlStateNormal];
[alertButton addTarget:self action:@selector(clickAlertButton:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:alertButton];
UIButton *actionSheetButton = [UIButton buttonWithType:UIButtonTypeSystem];
actionSheetButton.frame = CGRectMake(40, 200, 200, 40);
actionSheetButton.backgroundColor = [UIColor orangeColor];
[actionSheetButton setTitle:@"ActionSheetButton" forState:UIControlStateNormal];
[actionSheetButton addTarget:self action:@selector(clickActionSheetButton:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:actionSheetButton];
}
- (void)clickAlertButton:(UIButton*)sender {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"AlertButton" message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
NSLog(@"11111");
}];
[alertController addAction:cancelAction];
UIAlertAction *otherAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSLog(@"222222");
}];
self.otherAction = otherAction;
otherAction.enabled = NO;
[alertController addAction:otherAction];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
self.myTextField = textField;
textField.placeholder = @"必填";
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleTextFieldTextDidChangeNotification:) name:UITextFieldTextDidChangeNotification object:textField];
}];
[self presentViewController:alertController animated:YES completion:nil];
}
- (void)handleTextFieldTextDidChangeNotification:(NSNotification *)notification {
if(self.myTextField.text.length > 0) {
self.otherAction.enabled = YES;
} else {
self.otherAction.enabled = NO;
}
}
- (void)clickActionSheetButton:(UIButton*)sender {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"ActionSheet" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
NSLog(@"11111");
}];
[alertController addAction:cancelAction];
UIAlertAction *otherAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSLog(@"222222");
}];
[alertController addAction:otherAction];
[self presentViewController:alertController animated:YES completion:nil];
}
@end
