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18472316003背景：在开发过程中，iOS8之后，当触发textField时键盘响应，此时如果点击按钮弹出UIAlertView点击取消或者确定时，键盘会收回再次弹出（闪现一次）
在iOS8之后，UIAlertView被弃用，改用UIAlertController，所以在使用过程中需要对系统进行判断，在iOS8之前用UIAlertView，在iOS8之后用UIAlertController，在这里我做了一下封装，直接上代码：
//宏定义 判断手机系统 #define iOS8 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) #define iOS7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) #define iOS6 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 6.0) |
创建自定义的AlertView（我这里就直接用ZGYAlertView）继承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文件中代码 @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); } |
完成之后直接调用即可，采用block回调的方式监听点击取消或者确定的按钮。
