Some properties of iOS Uitextfield,uibutton,uiwebview and tips for using iOS image resources

Sometimes the UI is inconsistent with the actual frame, so we're going to stretch the picture.

uiimage* image = [[UIImage imagenamed:@ "Text_field_bg.png"] stretchableimagewithleftcapwidth:20 topcapheight:0];   Stretchableimagewithleftcapwidth make a picture have a stretch effect

The properties of Uitextfield are described in:

  uitextfield* field = [[Uitextfield alloc] Initwithframe:cgrectmake (80, 10, 170, 30)];    _textfield = field; _textfield.autoresizingmask = uiviewautoresizingflexiblewidth;//automatically adjusts its position so that its left and right margins and Superview remain the same _  textfield.enablesreturnkeyautomatically = YES;     Make return available at input _textfield.placeholder = @ "Please input:";  Set the value of hint _textfield.textalignment = nstextalignmentleft;   Text on the left shows _textfield.borderstyle = Uitextborderstylenone;   No Border _textfield.font = [Uifont systemfontofsize:18.0f];    Set Font Size _textfield.contenthorizontalalignment = Uicontrolcontenthorizontalalignmentcenter;  _textfield.contentverticalalignment = Uicontrolcontentverticalalignmentcenter;  These two make the text appear centered _textfield.clearbuttonmode = uitextfieldviewmodewhileediting; When entered, there is a clear button uiimage* image = [[UIImage imagenamed:@ "Text_field_bg.png"] stretchableimagewithleftcapwidth:20 to   PCAPHEIGHT:0]; Stretchableimagewithleftcapwidth make the picture have a stretch effect 20 means that the left border of the picture 20 pixels can be stretched horizontally _textfield.delegate = self;  Set proxy _textfield.background = image for TextField;    Background setting _textfield.leftviewmode = Uitextfieldviewmodealways;    CGRect frame = [_textfield frame];    Frame.size.width = 15;    uiview* view1 = [[UIView alloc] initwithframe:frame];  _textfield.leftview = View1; Above a few words set the text with TextField left some distance [Self.view Addsubview:_textfield];

How to set up let Uitextfield only input in English, first let controller implement Uitextfielddelegate agent

-(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{//input data format is incorrect            NSLog (@ "format is incorrect");            [Textfield.text stringbyreplacingcharactersinrange:range withstring:@ "];            return NO;        }    }    return YES;}

If you want the keyboard to pop up when you enter the interface, you can do this:

[_textfieldbecomefirstresponder];

The properties of UIButton are described in:

 uibutton* button = [UIButton buttonwithtype:uibuttontypecustom]; Init a button, you can customize the background [button Setbackgroundimage:[[uiimage imagenamed:@ "[email protected]"]    Stretchableimagewithleftcapwidth:20 topcapheight:0] forstate:uicontrolstatenormal];  Button.frame = CGRectMake (260,10, 49, 30); Set button background with normal and highlight two states [button Setbackgroundimage:[[uiimage imagenamed:@ "[email protected]"]    Stretchableimagewithleftcapwidth:20 topcapheight:0] forstate:uicontrolstatehighlighted];    Button.frame = CGRectMake (260,10, 49, 30);  [Button settitle:@ "OK" forstate:uicontrolstatenormal]; Set the button's 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]; If the onclick has a colon, the button will be passed when the method is written.  Like onclick: (ID) sender [self.view Addsubview:button]; 

The properties of UIWebView are described in:

  uiwebview* WebView = [[UIWebView alloc] Initwithframe:cgrectmake (0, +, +, 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];

Code can be downloaded in http://download.csdn.net/detail/baidu_nod/7595369

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