代码说明：
1、主要是通过对资源文件或者对从数据库中查询的资源进行遍历然后添加到ScrollView中
2.为了适应不同的屏幕给相应的组件添加了约束
3.ToolView组件的封装： ToolView就是在主屏幕上下面的类似于TabBar的东西，当键盘出来的时候,ToolView会运动到键盘上面的位置。为了使用不同的屏幕，也需要用自动布局来实现。
ToolView.h的代码如下：预留组件接口和声明block类型
// ToolView.h
// MyKeyBoard
//
// Created by 青玉伏案 on 14-9-16.
// Copyright (c) 2014年 Mrli. All rights reserved.
//
/*****************
封装下面的工具条组件
*****************/
#import //定义block块变量类型，用于回调,把本View上的按钮的index传到Controller中
typedef void (^ToolIndex) (NSInteger index);
@interface ToolView : UIView
//块变量类型的setter方法
-(void)setToolIndex:(ToolIndex) toolBlock;
@end
ToolView.m的代码实现：
// ToolView.m
// MyKeyBoard
//
// Created by 青玉伏案 on 14-9-16.
// Copyright (c) 2014年 Mrli. All rights reserved.
//
#import "ToolView.h"
@interface ToolView ()
//定义ToolIndex类型的block,用于接受外界传过来的block
@property (nonatomic, strong) ToolIndex myBlock;
@end
@implementation ToolView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
//1初始化表情按钮
UIButton *faceButton = [[UIButton alloc] initWithFrame:CGRectZero];
faceButton.backgroundColor = [UIColor orangeColor];
[faceButton setTitle:@"表情" forState:UIControlStateNormal];
[faceButton setShowsTouchWhenHighlighted:YES];
[faceButton addTarget:self action:@selector(tapFaceButton:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:faceButton];
//初始化更多按钮
UIButton *moreButton = [[UIButton alloc] initWithFrame:CGRectZero];
moreButton.backgroundColor = [UIColor grayColor];
[moreButton setTitle:@"More" forState:UIControlStateNormal];
[moreButton setShowsTouchWhenHighlighted:YES];
[moreButton addTarget:self action:@selector(tapMoreButton:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:moreButton];
//给我们的按钮添加约束来让按钮来占满toolView;
faceButton.translatesAutoresizingMaskIntoConstraints = NO;
moreButton.translatesAutoresizingMaskIntoConstraints = NO;
//添加水平约束
NSArray *buttonH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[faceButton][moreButton(==faceButton)]|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(faceButton,moreButton)];
[self addConstraints:buttonH];
//添加垂直约束
NSArray *button1V = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[faceButton]|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(faceButton)];
[self addConstraints:button1V];
NSArray *button2V = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[moreButton]|" options:0 metrics:0 views:NSDictionaryOfVariableBindings(moreButton)];
[self addConstraints:button2V];
}
return self;
}
//接受传入的回调
-(void) setToolIndex:(ToolIndex)toolBlock
{
self.myBlock = toolBlock;
}
//点击表情按钮要回调的方法
-(void) tapFaceButton: (id) sender
{
self.myBlock(1);
}
//点击more要回调的方法
-(void) tapMoreButton: (id) sender
{
self.myBlock(2);
}
@end
