UIActionSheet减少在控制器再写一次代理

利用 CFRunLoopRun 和 CFRunLoopStop 方法来将 UIActionSheet 改造成同步的调用。

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

@interface SynchronizedUIActionSheet : NSObject

- (NSInteger)showInView:(UIView *)view;

@end

// SynchronizedUIActionSheet.m

// SynchronizedUIActionSheet

// Created by Evan on 16/6/29.

#import "SynchronizedUIActionSheet.h"

@interface SynchronizedUIActionSheet ()<UIActionSheetDelegate>

@property (nonatomic, strong) UIActionSheet *actionSheet;

@property (nonatomic, assign) NSInteger selectedIndex;

@end

@implementation SynchronizedUIActionSheet

- (NSInteger)showInView:(UIView *)view

{

_actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"111" otherButtonTitles:nil, nil];

[_actionSheet showInView:view];

CFRunLoopRun();

return _selectedIndex;

}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {

_selectedIndex = buttonIndex;

_actionSheet = nil;

CFRunLoopStop(CFRunLoopGetCurrent());

}

@end