iOS：便捷使用UIAlertController弹框

UIAlertController弹框的使用虽然不复杂，但是代码有点多，如果项目中频繁使用UIAlertController弹框的话会显得代码很累赘。

UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
}]];
    
[alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
}]];
    // 弹出对话框
[object presentViewController:alert animated:true completion:nil];

下面创建一个类用来统一处理弹窗，将需要实现的方法与对象通过参数的形式传递进来。

HYAlertManager.h文件

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>

@interface HYAlertManager : NSObject

+(instancetype)shareManager;


-(void)alertTitle:(NSString *)title message:(NSString *)message commit:(SEL)commitMethod object:(id)object;

@end

HYAlertManager.m文件

//传递函数、参数
#define SuppressPerformSelectorLeakWarning(Stuff) \
do { \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
Stuff; \
_Pragma("clang diagnostic pop") \
} while (0)


#import "HYAlertManager.h"

@implementation HYAlertManager

static HYAlertManager *alertManager = nil;
+(instancetype)shareManager{
    @synchronized ([HYAlertManager class]) {
        if (alertManager == nil) {
            alertManager = [[HYAlertManager alloc] init];
        }
    }
    return alertManager;
}

+(instancetype)alloc{
    @synchronized ([HYAlertManager class]) {
        alertManager = [super alloc];
    }
    return alertManager;
}

-(void)alertTitle:(NSString *)title message:(NSString *)message commit:(SEL)commitMethod object:(id)object{
    
    
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
        SuppressPerformSelectorLeakWarning([object performSelector:commitMethod withObject:nil]);
    }]];
    
    [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
    }]];
    // 弹出对话框
    [object presentViewController:alert animated:true completion:nil];
    
}

@end

调用

#import "ViewController.h"
#import "HYAlertManager.h"

@interface ViewController ()
@property (nonatomic, strong) UILabel *label;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(20, 100, 50, 30);
    [btn setTitle:@"弹框" forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
    btn.backgroundColor = [UIColor orangeColor];
    [self.view addSubview:btn];
    
    self.label = [[UILabel alloc] initWithFrame:CGRectMake(20, 60, 250, 30)];
    [self.view addSubview:self.label];
}

-(void)btnClick{
    
    [[HYAlertManager shareManager] alertTitle:@"提示" message:@"即将显示当前时间" commit:@selector(commit) object:self];
}

-(void)commit{
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSDate *date = [NSDate new];
    self.label.text = [formatter stringFromDate:date];
}

@end

小伙伴们可以根据自己的需要设置参数。

下面是为需要的小伙伴们提供的demo:https://github.com/ITHanYong/AlertManager.git