有時候UI給開發的資源跟實際的frame不一致，這個時候我們就要去拉伸圖片

UIImage* image = [[UIImage imageNamed:@"text_field_bg.png"] stretchableImageWithLeftCapWidth:20 topCapHeight:0];   //stretchableImageWithLeftCapWidth使圖片有拉伸效果

UITextField的屬性介紹：

  UITextField* field = [[UITextField alloc] initWithFrame:CGRectMake(80, 10, 170, 30)];
    _textField = field;
    _textField.autoresizingMask = UIViewAutoresizingFlexibleWidth;//自動調整自己的位置，使自己的左邊距和右邊距和superview保持不變
    _textField.enablesReturnKeyAutomatically = YES;  //使return在輸入時可以使用
    _textField.placeholder = @"please input:";     //設置hint的值
    _textField.textAlignment = NSTextAlignmentLeft;  //文字靠左顯示
    _textField.borderStyle = UITextBorderStyleNone;   //沒有邊框
    _textField.font = [UIFont systemFontOfSize:18.0f];   //設置字體大小
    _textField.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
    _textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;  //這兩個使文字會居中顯示
    _textField.clearButtonMode = UITextFieldViewModeWhileEditing;  //當輸入時有clear button
    UIImage* image = [[UIImage imageNamed:@"text_field_bg.png"] stretchableImageWithLeftCapWidth:20 topCapHeight:0];   //stretchableImageWithLeftCapWidth使圖片有拉伸效果  20表示圖片的左邊的邊框20像素處可以橫向拉伸
    _textField.delegate = self; //給textField設置代理
    _textField.background = image;  //背景設置
    _textField.leftViewMode = UITextFieldViewModeAlways;
    CGRect frame = [_textField frame];
    frame.size.width = 15;
    UIView* view1 = [[UIView alloc] initWithFrame:frame];
    _textField.leftView = view1;  //上面幾句話設置文字跟textField的左邊有些距離
    
    [self.view addSubview:_textField];

如何設置讓UITextField只能輸入英文,先讓Controller實現UITextFieldDelegate的代理

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    if ([string length]) {
        unichar single = [string characterAtIndex:0];
        if (single > 'a' && single < 'z') {
            return YES;
        }else{//輸入的數據格式不正確
            NSLog(@"格式不正確");
            [textField.text stringByReplacingCharactersInRange:range withString:@""];
            return NO;
        }
    }
    return YES;
}

如果想使鍵盤在進入界面的時候就彈出來，可以這樣來做:

[_textFieldbecomeFirstResponder];

UIButton的屬性介紹:

 UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom]; //init一個button,可以自定義背景
    [button setBackgroundImage:[[UIImage imageNamed:@"cancel_but_bg@2x.png"] stretchableImageWithLeftCapWidth:20 topCapHeight:0] forState:UIControlStateNormal];
    button.frame = CGRectMake(260,10, 49, 30);  //設置button的背景，有normal和highlight兩種狀態
    [button setBackgroundImage:[[UIImage imageNamed:@"cancel_but_bg2@2x.png"] stretchableImageWithLeftCapWidth:20 topCapHeight:0] forState:UIControlStateHighlighted];
    button.frame = CGRectMake(260,10, 49, 30);
    [button setTitle:@"確定" forState:UIControlStateNormal];  //設置Button的text
    [button setTitleColor:[MyViewController RGBColorFromHexString:@"#333333" alpha:1.0f] forState:UIControlStateNormal];
    [button setTitleColor:[MyViewController RGBColorFromHexString:@"#000000" alpha:1.0f] forState:UIControlStateHighlighted];
    [button addTarget:self action:@selector(onclick) forControlEvents:UIControlEventTouchUpInside];  //如果onclick帶冒號則寫方法的時候會把button也傳過去  像onclick:(id)sender
    [self.view addSubview:button];

UIWebView的屬性介紹:

  UIWebView* webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 46, 320, 480-46)];
    _webView = webView;
    webView.delegate = self;
    NSURL* url = [NSURL URLWithString:@"http://m.baidu.com"];
    NSURLRequest* request = [NSURLRequest requestWithURL:url];
    [webView loadRequest:request];
    [self.view addSubview:webView];

代碼可以在http://download.csdn.net/detail/baidu_nod/7595369下載

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