本文共 10346 字，大约阅读时间需要 34 分钟。

1.UIWebView：

- (void)viewDidLoad {    [super viewDidLoad];    self.webView = [[UIWebView alloc] initWithFrame:[UIScreen mainScreen].bounds];    NSURLRequest *reduest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]];    [self.webView loadRequest:reduest];    [self.view addSubview:self.webView];    self.webView.delegate = self;            // Do any additional setup after loading the view, typically from a nib.}-(void)webViewDidStartLoad:(UIWebView *)webView {    NSLog(@"STARTing");}-(void)webViewDidFinishLoad:(UIWebView *)webView {    NSLog(@"finish......");        #pragma mark----将你设置的背景图和小菊花删除    {        [self.act stopAnimating];        UIView *ab = (UIView *)[self.view viewWithTag:103];//用tag强转  因为之前view1不是属性，不能直接用self点出来        [ab removeFromSuperview];    }}- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {    NSLog(@"error");#pragma mark--当加载网页出错的时候:设置背景图和小菊花，一直缓冲    数据出来之后，删除背景图与菊花        {        UIView *view1 = [[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds];        view1.backgroundColor = [UIColor redColor];        [self.view addSubview:view1];        view1.alpha = 0.3;                self.act = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(100, 100, 50, 50)];        self.act.center = view1.center;        self.act.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;        [view1 addSubview:self.act];        view1.tag = 103;        [self.act startAnimating];    }}

2. UIAlertController：

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];        RootViewController *rootVC = [[RootViewController alloc] init];        UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:rootVC];        self.window.rootViewController = naVC;    return YES;}

- (void)viewDidLoad {    [super viewDidLoad];    #pragma mark-----1. 初始化    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"确定" message:@"取消" preferredStyle:UIAlertControllerStyleAlert];    #pragma mark-----2. 添加类似于按钮的东西 block里面写点击后的操作    // 三种按钮的格式default cancel destructive：    UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"default" style: UIAlertActionStyleDefault handler:^(UIAlertAction *action) {        NSLog(@"11111");                // 获取输入框里的文本内容：需要强转一下（xcode6）        UITextField *str = (UITextField *)alert.textFields[0];        NSLog(@"%@", str.text);    }];        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"cancel" style: UIAlertActionStyleCancel handler:^(UIAlertAction *action) {        NSLog(@"22222");    }];        UIAlertAction *destruAction = [UIAlertAction actionWithTitle:@"destructive" style: UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {        NSLog(@"333333");    }];    #pragma mark-----3. 添加输入框：    [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {        textField.text = @"smg";    }];        [alert addAction:defaultAction];    [alert addAction:cancelAction];    [alert addAction:destruAction];            [self presentViewController:alert animated:YES completion:nil];}

3. UIPickerView：

先学习UITableView  这个就简单了

#import "ViewController.h"@interface ViewController ()
   
    @property (nonatomic,strong) UIPickerView *pick;@property (nonatomic,strong) NSMutableArray *arrayData;@property (nonatomic,strong) NSMutableArray *arrayData2;@property (nonatomic,strong) NSMutableArray *arrayData3;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        // 初始化同样是三步：    self.pick = [[UIPickerView alloc] initWithFrame:CGRectMake(10, 50, 350, 200)];    self.pick.backgroundColor = [UIColor redColor];    [self.view addSubview:self.pick];        //和tableView类似 遵循两个协议:
    
         self.pick.delegate = self;    self.pick.dataSource = self;        self.arrayData = [NSMutableArray arrayWithObjects:@"水瓶座",@"双鱼座",@"白羊座",@"金牛座",@"双子座",@"巨蟹座",@"狮子座",@"处女座",@"天秤座",@"天蝎座",@"射手座",@"山羊座", nil];        self.arrayData2 = [NSMutableArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12", nil];            self.arrayData3 = [NSMutableArray arrayWithObjects:@"2010" , @"2011", @"2012", @"2013",@"2014",@"2015",@"2016", @"2017",  nil];        // 加载视图时显示的是第几列的第几行  行列都是从0开始    //Component：列   row：行    [self.pick selectRow:4 inComponent:1 animated:YES];    }#pragma mark   1. 设置某列中每行的高度- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component {    return 30;}#pragma mark   2. 设置列数- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {    return 3;}#pragma mark   3. 设置某列中的行数- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {    if (component == 0) {        return self.arrayData3.count;    }else if (component == 1) {        return self.arrayData2.count;    }else {        return self.arrayData.count;    }    }#pragma mark   4. 每列中每行显示的内容- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {    if (component == 0) {         return self.arrayData3[row];    }else if (component == 1) {        return self.arrayData2[row];    }else {        return self.arrayData[row];    }}#pragma mark   5. 选中的响应事件- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {        if (component == 0) {         NSLog(@"%@", self.arrayData3[row]);    }else if (component == 1) {        NSLog(@"%@", self.arrayData2[row]);    }else {         NSLog(@"%@", self.arrayData[row]);    }   }
    
   

补充：

// 可永久保存数据    NSUserDefaults *user = [NSUserDefaults standardUserDefaults];    [user setValue:@"wang" forKey:@"userName"];

4. UIImagePickerController：

- (void)viewDidLoad {    [super viewDidLoad];    self.imV = [[UIImageView alloc] initWithFrame:CGRectMake(50, 50, 300, 300)];    self.imV.layer.cornerRadius = 150;    self.imV.backgroundColor = [UIColor redColor];                self.button = [UIButton buttonWithType:UIButtonTypeCustom];    self.button.frame = CGRectMake(50, CGRectGetMaxY(self.imV.frame)+30, 100, 50);    [self.button setTitle:@"ha" forState:UIControlStateNormal];    self.button.backgroundColor = [UIColor blackColor];        // 设置这个属性之后，选中的图片会和你设置的imV边框一致  （而不是方的）    self.imV.layer.masksToBounds = YES;        // 给按钮添加事件 跳转到系统相册    [self.button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];            [self.view addSubview:self.button];    [self.view addSubview:self.imV];    }#pragma mark ====  ==== 按钮的响应事件：- (void)buttonAction:(UIButton *)sender {    // 系统封装的控制器  初始化一下就可以    UIImagePickerController *pickerVC = [[UIImagePickerController alloc] init];        // 设置代理  遵守两个协议：
   
        pickerVC.delegate = self;        // 可以编辑图片    pickerVC.allowsEditing = YES;        // xcode6这样写 才会显示系统相册    pickerVC.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;    [self presentViewController:pickerVC animated:YES completion:nil];}#pragma mark ====  ==== 选中系统相册图片：- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {        // 选中系统的图片后  将其返回到自己设置的imV上显示    self.imV.image = [info objectForKey:UIImagePickerControllerOriginalImage];    [self dismissViewControllerAnimated:YES completion:nil];    }#pragma mark ====  ==== 点击取消的时候：- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {    NSLog(@"CANCEL...");    [self dismissViewControllerAnimated:YES completion:nil];}
   

5. UIDatePicker：

// 初始化    self.datePicker = [[UIDatePicker alloc] init];        [self.datePicker setDatePickerMode:UIDatePickerModeDate];    [self.datePicker setMaximumDate:[NSDate date]];        [self.view addSubview:self.datePicker];

6. 调用电话 短信：

还有一个mailto

- (void)viewDidLoad {    [super viewDidLoad];    //调用网址//    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.baidu.com"]];        // 调用发送短信    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://10086"]];        // 调用打电话//    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://10086"]];        MFMessageComposeViewController *MF = [[MFMessageComposeViewController alloc] init];    if ([MFMessageComposeViewController canSendText]) {        MF.body = @"hello word";        MF.recipients = @[@"10086"];        MF.messageComposeDelegate = self;        [self presentViewController:MF animated:YES completion:nil];            }}- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result {    switch (result) {        case MessageComposeResultSent:            NSLog(@"ok");            break;        case MessageComposeResultFailed:            NSLog(@"fail");            break;        case MessageComposeResultCancelled:            NSLog(@"cancel");            break;        default:            break;    }}

7. UIWindowLevel:

UIWindowLevel 只是window的层级关系  有三种情况：UIWindowLevelNormal   UIWindowLevelStatusBar  UIWindowLevelAlert

默认是UIWindowLevelNormal是最底层 中间是UIWindowLevelStatusBar   最上层：UIWindowLevelAlert

8. 谓词：

NSArray *arrayPerson = [NSArray arrayWithObjects:                                [Person personWithName:@"zhang" age:10] ,                                [Person personWithName:@"3" age:15],                                [Person personWithName:@"1" age:23],                                [Person personWithName:@"1z" age:5],                                [Person personWithName:@"2" age:34], nil];        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name = '1' && age > 20"];        NSArray *array1 = [arrayPerson filteredArrayUsingPredicate:predicate];        NSLog(@"%@", array1);                        NSPredicate *precidate2 = [NSPredicate predicateWithFormat:@"name IN {'zhang','2','3'} || age IN {30, 50}"];        NSArray *array2 = [arrayPerson filteredArrayUsingPredicate:precidate2];        NSLog(@"%@", array2);

@"name contains 'z'"

@"name like '*z'"

like '?'// 问号代表一个字符    *：表示多个字符

BEGINSWITH 'z'// 以什么开始   （大小写敏感）

ENDSWITH 'z' // 以什么结束   （大小写敏感）

转载地址：https://blog.csdn.net/Evelynzn/article/details/49304517 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！