iOS中各种UI控件属性设置示例代码

//视图已经加载完了，可以进行ui的添加了
- (void)viewdidload {
 [superviewdidload];
 // do any additional setup after loading the view.
 //初始化uilabel注意指定该对象的位置及大小
 uilabel *lb = [[uilabelalloc]initwithframe:cgrectmake(0,20,300,200)];
 //设置文字
 lb.text =@"label测试我在学习中学些ui story水电费水电费未入围 i肉煨入味哦水电费水电费水电费";
 //设置背景色
 lb.backgroundcolor = [uicolorcolorwithred:0green:191.0/255.0blue:243.0/255.0alpha:1.0];
 //设置文字颜色
 lb.textcolor = [uicolorwhitecolor];
 //文字大小，文字字体
 lb.font = [uifontsystemfontofsize:25];
 nslog(@"系统字体名字：%@",lb.font.familyname);
 //打印文字字体列表
 nsarray *arrfonts = [uifontfamilynames];
 nslog(@"系统字体列表：%@",arrfonts);
 //文字对齐
 lb.textalignment =nstextalignmentjustified;
// nstextalignmentleft  = 0, //居左对齐，默认
// nstextalignmentcenter = 1, //居中对齐
// nstextalignmentright  = 2, //居右对齐
// nstextalignmentjustified = 3, // fully-justified. the last line in a paragraph is natural-aligned.
// nstextalignmentnatural = 4, // indicates the default alignment for script

 //换行模式
 lb.linebreakmode =nslinebreakbycharwrapping;
// nslinebreakbywordwrapping = 0, //每一行的结尾以字或者一个完整单词换行（若不够一个单词的位置）
// nslinebreakbycharwrapping,//在每一行的结尾以字母进行换行
// nslinebreakbyclipping,// simply clip
// nslinebreakbytruncatinghead,// truncate at head of line: "...wxyz"
// nslinebreakbytruncatingtail,// truncate at tail of line: "abcd..."
// nslinebreakbytruncatingmiddle// truncate middle of line: "ab...yz"

 //指定行数，0为不限制行树，可以指定具体的数字
 lb.numberoflines =0;
 //加圆角
 lb.layer.cornerradius =30;
 //此行必须加，将原来的矩形角剪掉
 lb.clipstobounds =yes;
 //加边框颜色，宽度，注意给layer加的颜色是cgcolor类型
 lb.layer.bordercolor = [[uicolorredcolor]cgcolor];
 lb.layer.borderwidth =1.0;

 //把label添加到视图上，并且会显示
 [self.viewaddsubview:lb];
}

@interface viewcontroller : uiviewcontroller
@property ( weak , nonatomic ) iboutlet uilabel *usernamelabel
@property ( weak , nonatomic ) iboutlet uilabel *contentlabel;
@end

- ( void )viewdidload {
self . usernamelabel . text = @"用户名jordan cz: " ;
self . usernamelabel . adjustsfontsizetofitwidth = yes ;
[ self . usernamelabel sizetofit ];
  self . contentlabel . text = @"首行缩进根据用户昵称自动调整 间隔可自定根据需求随意改变。。。。。。。" ;
self . contentlabel . adjustsfontsizetofitwidth = yes ;
self . contentlabel . adjustsletterspacingtofitwidth = yes ;
[ self resetcontent ];
}

- ( void )resetcontent{
nsmutableattributedstring *attributedstring = [[ nsmutableattributedstring alloc ]initwithstring : self . contentlabel . text ];
nsmutableparagraphstyle *paragraphstyle = [[ nsmutableparagraphstyle alloc ]init ];
paragraphstyle. alignment = nstextalignmentleft ;
paragraphstyle. maximumlineheight = 60 ; //最大的行高 
paragraphstyle. linespacing = 5 ; //行自定义行高度
[paragraphstyle setfirstlineheadindent : self . usernamelabel . frame . size .width + 5 ]; //首行缩进 根据用户昵称宽度在加5个像素
[attributedstring addattribute : nsparagraphstyleattributename value:paragraphstyle range : nsmakerange ( 0 , [ self . contentlabel . text length ])];
self . contentlabel . attributedtext = attributedstring;
[ self . contentlabel sizetofit ];
}

//初始化并定义大小 
 uitextview *textview = [[uitextview alloc] initwithframe:cgrectmake(20, 10, 280, 30)];
 textview.backgroundcolor=[uicolor whitecolor]; //背景色
 textview.scrollenabled = no; //当文字超过视图的边框时是否允许滑动，默认为“yes”
 textview.editable = yes;  //是否允许编辑内容，默认为“yes”
 textview.delegate = self;  //设置代理方法的实现类
 textview.font=[uifont fontwithname:@"arial" size:18.0]; //设置字体名字和字体大小;
 textview.returnkeytype = uireturnkeydefault;//return键的类型
 textview.keyboardtype = uikeyboardtypedefault;//键盘类型
 textview.textalignment = nstextalignmentleft; //文本显示的位置默认为居左
 textview.datadetectortypes = uidatadetectortypeall; //显示数据类型的连接模式（如电话号码、网址、地址等）
 textview.textcolor = [uicolor blackcolor];
 textview.text = @"uitextview详解";//设置显示的文本内容
 [self.view addsubview:textview];

//将要开始编辑
- (bool)textviewshouldbeginediting:(uitextview *)textview;

//将要结束编辑
- (bool)textviewshouldendediting:(uitextview *)textview;

//开始编辑
- (void)textviewdidbeginediting:(uitextview *)textview;

//结束编辑
- (void)textviewdidendediting:(uitextview *)textview;

//内容将要发生改变编辑
- (bool)textview:(uitextview *)textview shouldchangetextinrange:(nsrange)range replacementtext:(nsstring*)text;

//内容发生改变编辑
- (void)textviewdidchange:(uitextview *)textview;

//焦点发生改变
- (void)textviewdidchangeselection:(uitextview *)textview;

- (void)textviewdidchange:(uitextview *)textview{
 //计算文本的高度
 cgsize constraintsize;
 constraintsize.width = textview.frame.size.width-16;
 constraintsize.height = maxfloat;
 cgsize sizeframe =[textview.text sizewithfont:textview.font
 constrainedtosize:constraintsize
 linebreakmode:uilinebreakmodewordwrap];

 //重新调整textview的高度
 textview.frame =cgrectmake(textview.frame.origin.x,textview.frame.origin.y,textview.frame.size.width,sizeframe.height+5);
}

- (bool)textview:(uitextview *)textview shouldchangetextinrange:(nsrange)range replacementtext:(nsstring*)text
{
 if (range.location>=100)
 {
 //控制输入文本的长度
 return no;
 }
 if ([text isequaltostring:@"\n"]) {
 //禁止输入换行
 return no;
 }
 else
 {
 return yes;
 }
}

- (void)textviewdidbeginediting:(uitextview *)textview {

 uibarbuttonitem *done = [[uibarbuttonitem alloc] initwithbarbuttonsystemitem:uibarbuttonsystemitemdone
 target:self
 action:@selector(dismisskeyboard)];

 self.navigationitem.rightbarbuttonitem = done;

 [done release];
 done = nil;

}

- (void)textviewdidendediting:(uitextview *)textview { 
 self.navigationitem.rightbarbuttonitem = nil; 
}

- (void)dismisskeyboard { 
 [self.textview resignfirstresponder]; 
}

-(bool)textview:(uitextview *)textview shouldchangetextinrange:(nsrange)range replacementtext:(nsstring*)text
{
 if ([text isequaltostring:@"\n"]) {
  [textview resignfirstresponder];
 return no;
 }
 return yes;
}

 uitoolbar * topview = [[uitoolbar alloc]initwithframe:cgrectmake(0, 0, 320,30)];
 [topview setbarstyle:uibarstyleblack];

 uibarbuttonitem *btnspace = [[uibarbuttonitem alloc]initwithbarbuttonsystemitem:uibarbuttonsystemitemflexiblespace
 target:self
 action:nil];

 uibarbuttonitem *donebutton = [[uibarbuttonitem alloc]initwithtitle:@"done"
 style:uibarbuttonitemstyledone
 target:self
 action:@selector(dismisskeyboard)];

 nsarray * buttonsarray = @[btnspace, donebutton];;
 [donebutton release];
 [btnspace release];
 [topview setitems:buttonsarray];
 [textview setinputaccessoryview:topview];//当文本输入框加上topview
 [topview release];
 topview = nil;

-(ibaction)dismisskeyboard
{
 [tvtextview resignfirstresponder];
}