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19974831731背景：在開發過程中，iOS8之后，當觸發textField時鍵盤響應，此時如果點擊按鈕彈出UIAlertView點擊取消或者確定時，鍵盤會收回再次彈出（閃現一次）
在iOS8之后，UIAlertView被棄用，改用UIAlertController，所以在使用過程中需要對系統進行判斷，在iOS8之前用UIAlertView，在iOS8之后用UIAlertController，在這里我做了一下封裝，直接上代碼：
//宏定義 判斷手機系統 #define iOS8 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) #define iOS7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) #define iOS6 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 6.0) |
創建自定義的AlertView（我這里就直接用ZGYAlertView）繼承NSObject
.h文件中 typedef NS_ENUM(NSInteger){ CANCLEBTN = 0, ENTERBTN, }AlertViewBtnIndex; typedef void(^AlertViewSselectBlock)(AlertViewBtnIndex index); @interface ZGYAlertView : NSObject @property (nonatomic, copy) AlertViewSselectBlock block; - (void)showAlertViewMessage:(NSString *)msg Title:(NSString *)title cancleItem:(NSString *)cancle andOtherItem:(NSString *)other viewController:(UIViewController *)controller onBlock:(void (^)(AlertViewBtnIndex))alertViewBlock; |
.m文件中代碼 @interface ZGYAlertView (){ AlertViewSselectBlock _alertViewBlock; } @end @implementation ZGYAlertView - (void)showAlertViewMessage:(NSString *)msg Title:(NSString *)title cancleItem:(NSString *)cancle andOtherItem:(NSString *)other viewController:(UIViewController *)controller onBlock:(void (^)(AlertViewBtnIndex))alertViewBlock{ if (iOS8) { UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:msg preferredStyle:UIAlertControllerStyleAlert]; if (cancle != nil) { [alert addAction:[UIAlertAction actionWithTitle:cancle style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { alertViewBlock(CANCLEBTN); }]]; } if (other != nil) { [alert addAction:[UIAlertAction actionWithTitle:other style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { alertViewBlock(ENTERBTN); }]]; } [controller presentViewController:alert animated:YES completion:nil]; }else{ UIAlertView *goHomePage = [[UIAlertView alloc] initWithTitle:title message:msg delegate:controller cancelButtonTitle:cancle otherButtonTitles:other, nil]; [goHomePage show]; _alertViewBlock = alertViewBlock; } } - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{ _alertViewBlock(buttonIndex); } |
完成之后直接調用即可，采用block回調的方式監聽點擊取消或者確定的按鈕。
