//

//  SCAlertController.h

//  SCAlertController

//

//  Created by it3部01 on 16/8/3.

//  Copyright © 2016年 benben. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface SCAlertAction : UIAlertAction

@property (nonatomic,strong) UIColor *textColor; /**< 按钮title字体颜色 */

@end

@interface SCAlertController : UIAlertController

@property (nonatomic,strong) UIColor *tintColor; /**< 统一按钮样式 不写系统默认的蓝色 */

@property (nonatomic,strong) UIColor *titleColor; /**< 标题的颜色 */

@property (nonatomic,strong) UIColor *messageColor; /**< 信息的颜色 */

@end

SCAlertController.m

//

//  SCAlertController.m

//  SCAlertController

//

//  Created by it3部01 on 16/8/3.

//  Copyright © 2016年 benben. All rights reserved.

//

#import "SCAlertController.h"

#import <objc/runtime.h>

@implementation SCAlertAction

//按钮标题的字体颜色

-(void)setTextColor:(UIColor *)textColor

{

_textColor = textColor;

unsigned int count = 0;

Ivar *ivars = class_copyIvarList([UIAlertAction class], &count);

for(int i =0;i < count;i ++){

Ivar ivar = ivars[i];

NSString *ivarName = [NSString stringWithCString:ivar_getName(ivar) encoding:NSUTF8StringEncoding];

if ([ivarName isEqualToString:@"_titleTextColor"]) {

[self setValue:textColor forKey:@"titleTextColor"];

}

}

}

@end

@implementation SCAlertController

-(void)viewDidLoad

{

[super viewDidLoad];

unsigned int count = 0;

Ivar *ivars = class_copyIvarList([UIAlertController class], &count);

for(int i = 0;i < count;i ++){

Ivar ivar = ivars[i];

NSString *ivarName = [NSString stringWithCString:ivar_getName(ivar) encoding:NSUTF8StringEncoding];

//标题颜色

if ([ivarName isEqualToString:@"_attributedTitle"] && self.title && self.titleColor) {

NSMutableAttributedString *attr = [[NSMutableAttributedString alloc]initWithString:self.title attributes:@{NSForegroundColorAttributeName:self.titleColor,NSFontAttributeName:[UIFont boldSystemFontOfSize:14.0]}];

[self setValue:attr forKey:@"attributedTitle"];

}

//描述颜色

if ([ivarName isEqualToString:@"_attributedMessage"] && self.message && self.messageColor) {

NSMutableAttributedString *attr = [[NSMutableAttributedString alloc] initWithString:self.message attributes:@{NSForegroundColorAttributeName:self.messageColor,NSFontAttributeName:[UIFont systemFontOfSize:14.0]}];

[self setValue:attr forKey:@"attributedMessage"];

}

}

//按钮统一颜色

if (self.tintColor) {

for (SCAlertAction *action in self.actions) {

if (!action.textColor) {

action.textColor = self.tintColor;

}

}

}

}

@end

一般来说对于SCAlertController里面的属性应该像SCAlertAction一样放在setter方法里面修改,这里我表示为了方便就放在这个方法里面了.

-(void)viewDidLoad

{

[super viewDidLoad];

}

用法就很简单了,和系统原生UIAlertController一样,只是把UI换成SC,当然你可以改成自己喜欢的,但是别忘了改完.

SCAlertController *alertController = [SCAlertController alertControllerWithTitle:@"你确定要退出吗?" message:nil preferredStyle:UIAlertControllerStyleActionSheet];

alertController.tintColor = [UIColor redColor]; //这里统一设置各个按钮的颜色都为红色.

当然,你还可以自定义某一个按钮的颜色.比如下面的取消按钮

alertController.titleColor = [UIColor redColor];

//取消

SCAlertAction *cancelAction = [SCAlertAction actionWithTitle:@"我不想退出" style:UIAlertActionStyleCancel handler:nil];

//单独修改一个按钮的颜色

cancelAction.textColor = [UIColor greenColor];

[alertController addAction:cancelAction];

//退出

SCAlertAction *exitAction = [SCAlertAction actionWithTitle:@"退出" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

}];

[alertController addAction:exitAction];

[self presentViewController:alertController animated:YES completion:nil];

}

作者：青春微凉来时路

链接：https://www.jianshu.com/p/cecd1b4bbf27

來源：简书

简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。