IOS基础

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1、修改UI大小

2、设置颜色

3、禁止横屏

4、点击空白处隐藏键盘

5、弹出键盘时，后面的UI整体上移

6、我的工具类[宏定义等]

1、修改UI大小可以通过frame或bounds属性来实现，但二者效果不同。

frame:

修改大小后，原先的左上角的坐标不会改变，既以原来的左上角坐标位置保持不变为前提进行尺寸的改变。

bounds

功能同frame,不同之处在于，以一身中点位置进行缩放。

修改位置的时候使用frame属性，它的坐标位置表示是的是一身在父空间种的坐标位置。

frame 修改下地址和尺寸

center 修改位置

bounds 只能修改尺寸，因为它的x,y一般为0

2、颜色设置：

指定RGB，参数是：红、绿、黄、透明度，范围是0-1

+ (UIColor *)colorWithRed:(CGFloat)redgreen:(CGFloat)greenblue:(CGFloat)bluealpha:(CGFloat)alpha;

指定HSB，参数是：色调（hue），饱和的（saturation），亮度（brightness）

+ (UIColor *)colorWithHue:(CGFloat)huesaturation:(CGFloat)saturationbrightness:(CGFloat)brightnessalpha:(CGFloat)alpha;

在自定义View的时候 设置蒙版的颜色可以这样弄，蒙版用一个UIImageView来做 kenshin笔记

当前的颜色改变透明度后的颜色：

UIColor *color = [UIColor redColor];UIColor *cl = [color colorWithAlphaComponent:0.5f];

自定义255的颜色值，将255转成0-1

CGFloatR  = (CGFloat) 225/255.0;CGFloatG = (CGFloat) 66/255.0;CGFloatB = (CGFloat) 88/255.0;CGFloat alpha = (CGFloat) 1.0;    UIColor *myColorRGB = [ UIColorcolorWithRed:Rgreen:Gblue:Balpha: alpha  ];self.tableView.backgroundColor = myColorRGB;

3.IOS禁止横屏

4.对键盘的隐藏——点击空白处隐藏、点击return键隐藏、

5.键盘出现时，后面的视图整体上移的方法



3.IOS禁止横屏(两种方式) 可以通过 cmd ＋右 方向键 在模拟器中测试
1：在AppDelegate中增加，这个方法可以禁止横屏

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window  
    {  
         return UIInterfaceOrientationMaskPortrait;  
    }
2:修改xcode中的配置 如下图（只保留第一个选项勾选即可）

4.对键盘的隐藏——点击键盘return键隐藏键盘、点击空白处隐藏键盘、
点击键盘return键隐藏键盘
2.1在需要实现的控制器中实现代理<UITextFieldDelegate>
2.2需要使用该功能的UITextField处，委托代理。记住一定是要在实例化之前【这一步很重要】
2.3实现代理方法
#pragma mark TextField代理
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}

点击空白处隐藏键盘、
#pragma mark view代理 点击空白区域是触发
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    //关闭键盘
    [self.username resignFirstResponder];
    [self.password resignFirstResponder];
}


5.键盘出现时，后面的视图整体上移的方法
- (void)viewDidLoad
{
    //[步骤1/3]获取键盘的监听广播
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillAppear2:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillDisappear2:) name:UIKeyboardWillHideNotification object:nil];
}

#pragma mark 键盘 高度的计算
-(CGFloat)keyboardEndingFrameHeight:(NSDictionary *)userInfo//计算键盘的高度
{
//    传入的(NSDictionary *)userInfo用于存放键盘的各种信息，其中UIKeyboardFrameEndUserInfoKey对应的存放键盘的尺寸信息，以CGRect形式取出
    CGRect keyboardEndingUncorrectedFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
    CGRect keyboardEndingFrame = [self.view convertRect:keyboardEndingUncorrectedFrame fromView:nil];
    return keyboardEndingFrame.size.height;
}
#pragma mark [步骤2/3]根据键盘高度将当前视图向上滚动同样高度。
-(void)keyboardWillAppear2:(NSNotification *)notification
{
    CGRect currentFrame = self.view.frame;
   
    if (currentFrame.origin.y < 0)//这里弥补了一个bug：当两个TextField来回切换的时候，软键盘一直都在，所以会重复调用keyboardWillAppear函数，从而导致currentFrame.origin.y = currentFrame.origin.y - keyBoardH * 0.4;执行，而此时的currentFrame只就累加了，所以必须清零
    {
        currentFrame.origin.y = 0;
        self.view.frame = currentFrame;
    }
   
    CGFloat keyBoardH = [self keyboardEndingFrameHeight:[notification userInfo]];
    currentFrame.origin.y = currentFrame.origin.y - keyBoardH * 0.4;
    self.view.frame = currentFrame;
}
#pragma mark [步骤3/3]当键盘消失后，视图需要恢复原状。
-(void)keyboardWillDisappear2:(NSNotification *)notification
{
    CGRect currentFrame = self.view.frame;
    CGFloat keyBoardH = [self keyboardEndingFrameHeight:[notification userInfo]];
    currentFrame.origin.y = currentFrame.origin.y + keyBoardH * 0.4;
    self.view.frame = currentFrame;
   
    //下面if语句的原理和keyboardWillAppear
    if (currentFrame.origin.y < 0)
    {
        currentFrame.origin.y = 0;
        self.view.frame = currentFrame;
    }
}
6、我的工具类[宏定义等]
////  Tools.m//  Device////  Created by kenshin on 15-9-9.//  Copyright (c) 2015年 kenshin. All rights reserved.//#import <Foundation/Foundation.h>#import <sqlite3.h>//获取手机屏幕的宽、高#define screenWidth [[UIScreen mainScreen] bounds].size.width#define screenHeight [[UIScreen mainScreen] bounds].size.height//字体颜色 为蓝色==帮助页面的背景色#define blueMyColor [UIColor colorWithRed:84.0/255 green:173.0/255 blue:235.0/255 alpha:1.0]#define colorMyButton [UIColor colorWithRed:0.0/255 green:122.0/255 blue:255.0/255 alpha:1.0]//参照IOS默认的Alert按钮颜色#define colorPageIn [UIColor colorWithRed:27.0/255 green:73.0/255 blue:97.0/255 alpha:1.0]//深#define colorPageCu [UIColor colorWithRed:120.0/255 green:180.0/255 blue:215.0/255 alpha:1.0]//浅#define colorTextBack [UIColor colorWithRed:214.0/255 green:214.0/255 blue:214.0/255 alpha:1.0]//浅灰色//全部按钮的背景#define imgBtnHighlighted [UIImage imageNamed:@"buddy_header_bg_highlighted"]//UI的圆角#define YUANJIAO 8//获取状态栏高度 貌似都使20#define statusHeight [[UIApplication sharedApplication] statusBarFrame].size.height//开关 字体大小#define switchFontSize [UIFont systemFontOfSize:14]#import "Tools.h"#import "sys/utsname.h"@implementation Tools- （void)intoFirtstVC{    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];    ViewController *rootController = [[ViewController alloc]init];    self.window.rootViewController = rootController;    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];}
//获取当前手机型号+ (NSString *)getCurrentDeviceModel{    struct utsname systemInfo;    uname(&systemInfo);    NSString *platform = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];            if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 2G (A1203)";    if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G (A1241/A1324)";    if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS (A1303/A1325)";    if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4 (A1332)";    if ([platform isEqualToString:@"iPhone3,2"]) return @"iPhone 4 (A1332)";    if ([platform isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (A1349)";    if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S (A1387/A1431)";    if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5 (A1428)";    if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (A1429/A1442)";    if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (A1456/A1532)";    if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (A1507/A1516/A1526/A1529)";    if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (A1453/A1533)";    if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5s (A1457/A1518/A1528/A1530)";    if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6 Plus (A1522/A1524)";    if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6 (A1549/A1586)";    if ([platform isEqualToString:@"iPhone8,1"]) return @"iPhone 6s Plus (A1522/A1524)";    if ([platform isEqualToString:@"iPhone8,2"]) return @"iPhone 6s (A1549/A1586)";        if ([platform isEqualToString:@"iPod1,1"])   return @"iPod Touch 1G (A1213)";    if ([platform isEqualToString:@"iPod2,1"])   return @"iPod Touch 2G (A1288)";    if ([platform isEqualToString:@"iPod3,1"])   return @"iPod Touch 3G (A1318)";    if ([platform isEqualToString:@"iPod4,1"])   return @"iPod Touch 4G (A1367)";    if ([platform isEqualToString:@"iPod5,1"])   return @"iPod Touch 5G (A1421/A1509)";        if ([platform isEqualToString:@"iPad1,1"])   return @"iPad 1G (A1219/A1337)";        if ([platform isEqualToString:@"iPad2,1"])   return @"iPad 2 (A1395)";    if ([platform isEqualToString:@"iPad2,2"])   return @"iPad 2 (A1396)";    if ([platform isEqualToString:@"iPad2,3"])   return @"iPad 2 (A1397)";    if ([platform isEqualToString:@"iPad2,4"])   return @"iPad 2 (A1395+New Chip)";    if ([platform isEqualToString:@"iPad2,5"])   return @"iPad Mini 1G (A1432)";    if ([platform isEqualToString:@"iPad2,6"])   return @"iPad Mini 1G (A1454)";    if ([platform isEqualToString:@"iPad2,7"])   return @"iPad Mini 1G (A1455)";        if ([platform isEqualToString:@"iPad3,1"])   return @"iPad 3 (A1416)";    if ([platform isEqualToString:@"iPad3,2"])   return @"iPad 3 (A1403)";    if ([platform isEqualToString:@"iPad3,3"])   return @"iPad 3 (A1430)";    if ([platform isEqualToString:@"iPad3,4"])   return @"iPad 4 (A1458)";    if ([platform isEqualToString:@"iPad3,5"])   return @"iPad 4 (A1459)";    if ([platform isEqualToString:@"iPad3,6"])   return @"iPad 4 (A1460)";        if ([platform isEqualToString:@"iPad4,1"])   return @"iPad Air (A1474)";    if ([platform isEqualToString:@"iPad4,2"])   return @"iPad Air (A1475)";    if ([platform isEqualToString:@"iPad4,3"])   return @"iPad Air (A1476)";    if ([platform isEqualToString:@"iPad4,4"])   return @"iPad Mini 2G (A1489)";    if ([platform isEqualToString:@"iPad4,5"])   return @"iPad Mini 2G (A1490)";    if ([platform isEqualToString:@"iPad4,6"])   return @"iPad Mini 2G (A1491)";        if ([platform isEqualToString:@"i386"])      return @"iPhone Simulator";    if ([platform isEqualToString:@"x86_64"])    return @"iPhone Simulator";    return platform;}@end

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