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];
}