[崩溃]----关于UIScrollView有些你很难知晓的崩溃情形-

//
//  RootViewController.m
//  BUG
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "RootViewController.h"

@interface RootViewController ()

{
    UIView    *_showView;
}

@end

@implementation RootViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    _showView = [[UIView alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:_showView];
    
    NSArray *title = @[@"YouXianMing",
                       @"XianHui",
                       @"XianMing",
                       @"XianNeng",
                       @"XianRen"];
    
    [title enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        // 初始化button
        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(50, 50*(idx + 1), 130, 30)];
        button.layer.borderWidth = 1.f;
        [_showView addSubview:button];
        
        // 设置字体
        button.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin"
                                                 size:15.f];
        
        // 设置标题以及标题颜色
        [button setTitle:obj
                forState:UIControlStateNormal];
        [button setTitleColor:[UIColor redColor]
                     forState:UIControlStateNormal];
        
        // 添加事件
        [button addTarget:self
                   action:@selector(buttonsEvent:)
         forControlEvents:UIControlEventTouchUpInside];
    }];
}

- (void)buttonsEvent:(UIButton *)button
{
    [_showView.subviews enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        UIButton *tmpButton = obj;
        
        if ([tmpButton isEqual:button])
        {
            [tmpButton setTitleColor:[UIColor redColor]
                            forState:UIControlStateNormal];
        }
        else
        {
            [tmpButton setTitleColor:[UIColor blackColor]
                            forState:UIControlStateNormal];
        }
    }];
}

@end