1、UILabel字體加粗 IOS
加粗;
[UILabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:20]];
加粗並且傾斜
[UILabel setFont:[UIFont fontWithName:@"Helvetica-BoldOblique" size:20]];
2、分享一個可垂直頂端對齊的UILabel
http://www.devdiv.com/分享一個可垂直頂端對齊的UILabel-weblog-64796-7239.html
/*
Accessing the Text Attributes
text property
font property
textColor property
textAlignment property
lineBreakMode property
enabled property
Sizing the Label’s Text
adjustsFontSizeToFitWidth property
baselineAdjustment property
minimumFontSize property 無例
numberOfLines property
Managing Highlight Values
highlightedTextColor property
highlighted property
Drawing a Shadow
shadowColor property
shadowOffset property
Drawing and Positioning Overrides
– textRectForBounds:limitedToNumberOfLines: 無例
– drawTextInRect: 無例
Setting and Getting Attributes
userInteractionEnabled property
*/
UILabel UIFont // default system font 17 plain
UILabel垂直居上對齊[label sizeToFit];
//設置文字過長時的顯示格式
label.lineBreakMode = UILineBreakModeWordWrap;
typedefenum {
UILineBreakModeWordWrap =0, // Wrap at word boundaries
UILineBreakModeCharacterWrap, // Wrap at character boundaries
UILineBreakModeClip, //截去多余部分 Simply clip when it hits the end of the rect截去多余部分
UILineBreakModeHeadTruncation, //截去頭部Truncate at head of line: "...wxyz". Will truncate multiline text on first line
UILineBreakModeTailTruncation,//截去尾部 Truncate at tail of line: "abcd...". Will truncate multiline text on last line
UILineBreakModeMiddleTruncation,//截去中間 Truncate middle of line: "ab...yz". Will truncate multiline text in the middle
} UILineBreakMode;
//設置label的行數，這個可以根據上節的UITextView自適應高度
label.numberOfLines = 2;
label.lineBreakMode = UILineBreakModeWordWrap;
label.textAlignment = UITextAlignmentCenter;//設置文字對齊位置，居左，居中，居右
label.text = @ "123" ;//設置顯示文字
//設置文字顏色，可以有多種顏色可以選擇
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor blackColor];
//設置字體:粗體，正常的是 SystemFontOfSize，調用系統的字體配置
label.font = [UIFont boldSystemFontOfSize:20];
label.font = [UIFont fontWithName:@ "Arial Rounded MT Bold" size:(36.0)];
//設置文本是否高亮和高亮時的顏色
scoreLabel.highlighted = YES;
scoreLabel.highlightedTextColor = [UIColor orangeColor];
//設置陰影的顏色和陰影的偏移位置
scoreLabel.shadowColor = [UIColor redColor];
scoreLabel.shadowOffset = CGSizeMake(1.0,1.0);
//設置是否能與用戶進行交互
scoreLabel.userInteractionEnabled = YES;
//設置label中的文字是否可變，默認值是YES
scoreLabel.enabled = NO;
//設置字體大小是否適應label寬度
label.adjustsFontSizeToFitWidth = YES;
//如果adjustsFontSizeToFitWidth屬性設置為YES，這個屬性就來控制文本基線的行為
typedefenum {
UIBaselineAdjustmentAlignBaselines =0,// default. used when shrinking text to position based on the original baseline
UIBaselineAdjustmentAlignCenters,
UIBaselineAdjustmentNone,
} UIBaselineAdjustment;
//最小文字號數
minimumFontSize
設置背景色為透明
scoreLabel.backgroudColor=[UIColor clearColor];
自定義的顏色：
scoreLabel.backgroudColor=[UIColor clearColor];
UIColor *color = [UIColor colorWithRed:1.0f green:50.0f blue:0.0f alpha:1.0f];
scoreLabel.textColor = [UIColor color]
//UIColor 里的 RGB 值是CGFloat類型的在0～1范圍內，對應0～255的顏色值范圍。
- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines;
//改變繪文字屬性.重寫時調用super可以按默認圖形屬性繪制,若自己完全重寫繪制函數，就不用調用super了.
- (void)drawTextInRect:(CGRect)rect;
eg：
UILabel *label = [[UILabelalloc] initWithFrame:CGRectMake(0, 0, 75, 40)]; //聲明UIlbel並指定其位置和長寬 label.backgroundColor = [UIColorclearColor]; //設置label的背景色，這里設置為透明色。 label.font = [UIFont fontWithName:@"Helvetica-Bold" size:13]; //設置label的字體和字體大小。
//lable的旋轉 label.transform = CGAffineTransformMakeRotation(0.1); //設置label的旋轉角度 label.text = @“helloworld”; //設置label所顯示的文本 label.textColor = [UIColorwhiteColor]; //設置文本的顏色 label.shadowColor = [UIColorcolorWithWhite:0.1falpha:0.8f]; //設置文本的陰影色彩和透明度。 label.shadowOffset = CGSizeMake(2.0f, 2.0f); //設置陰影的傾斜角度。 label.textAlignment = UITextAlignmentCenter; //設置文本在label中顯示的位置，這里為居中。 //換行技巧：如下換行可實現多行顯示，但要求label有足夠的寬度。 label.lineBreakMode = UILineBreakModeWordWrap; //指定換行模式 label.numberOfLines = 2; // 指定label的行數
讓label自適應里面的文字，自動調整寬度和高度的
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,0,0,0)];這個frame是初設的，沒關系，后面還會重新設置其size。
[label setNumberOfLines:0];
NSString *s = @"string......";
UIFont *font = [UIFont fontWithName:@"Arial" size:12];
CGSize size = CGSizeMake(320,2000);
CGSize labelsize = [s sizeWithFont:font constrainedToSize:size lineBreakMode:UILineBreakModeWordWrap];
[label setFrame:CGRectMake:(0,0, labelsize.width, labelsize.height)];
[self.view addSubView:label];
這樣就可以對s賦值讓其自動調整其大小了。
UILabel跑馬燈效果
|
//http://www.cocoachina.com/bbs/read.php?tid=74540
#import <UIKit/UIKit.h>
@interface TextFlowView : UIView {
//顯示文本的標簽 UILabel *_firstLabel; UILabel *_secondLabel;
//定時器 NSTimer *_timer;
//顯示的文本 NSString *_text;
//是否需要滾動 BOOL _needFlow;
//控件的框架大小 CGRect _frame;
//文本的字體 UIFont *_font;
//當前第一個控件的索引 NSInteger _startIndex;
//定時器每次執行偏移后，累計的偏移量之和 CGFloat _XOffset;
//文本顯示一行，需要的框架大小 CGSize _textSize;
}
- (id)initWithFrame:(CGRect)frame Text:(NSString *)text; - (void)setFont:(UIFont *)font; - (void)setText:(NSString *)text; @end
//////////////////////////////////////////////////////////////////////////////////
#import "TextFlowView.h"
@implementation TextFlowView
#pragma mark - #pragma mark 內部調用
#define SPACE_WIDTH 50 #define LABEL_NUM 2
//改變一個TRect的起始點位置，但是其終止店點的位置不變，因此會導致整個框架大小的變化 - (CGRect)moveNewPoint:(CGPoint)point rect:(CGRect)rect { CGSize tmpSize; tmpSize.height = rect.size.height + (rect.origin.y - point.y); tmpSize.width = rect.size.width + (rect.origin.x - point.x); returnCGRectMake(point.x, point.y, tmpSize.width, tmpSize.height); } //開啟定時器 - (void)startRun { _timer = [NSTimerscheduledTimerWithTimeInterval:0.02target:selfselector:@selector(timerAction) userInfo:nilrepeats:YES]; }
//關閉定時器 - (void)cancelRun { if (_timer) { [_timerinvalidate]; } }
//定時器執行的操作 - (void)timerAction { staticCGFloat offsetOnce = -1; _XOffset += offsetOnce; if (_XOffset + _textSize.width <= 0) { _XOffset += _textSize.width; _XOffset += SPACE_WIDTH; } [selfsetNeedsDisplay];
}
//計算在給定字體下，文本僅顯示一行需要的框架大小 - (CGSize)computeTextSize:(NSString *)text { if (text == nil) { returnCGSizeMake(0, 0); } CGSize boundSize = CGSizeMake(10000, 100); CGSize stringSize = [_textsizeWithFont:_fontconstrainedToSize:boundSize lineBreakMode:UILineBreakModeWordWrap]; return stringSize; }
- (id)initWithFrame:(CGRect)frame Text:(NSString *)text { self = [superinitWithFrame:frame]; if (self) { _text = [text retain]; _frame = frame; //默認的字體大小 _font = [UIFontsystemFontOfSize:16.0F]; self.backgroundColor = [UIColorredColor]; //初始化標簽 //判斷是否需要滾動效果 _textSize = [selfcomputeTextSize:text]; //需要滾動效果 if (_textSize.width > frame.size.width) { _needFlow = YES; [selfstartRun]; } } returnself; }
// Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { CGContextRef context= UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [UIColorwhiteColor].CGColor); // Drawing code CGFloat startYOffset = (rect.size.height - _textSize.height)/2; CGPoint origin = rect.origin; if (_needFlow == YES) { // NSLog(@"OFFSETX:%f", _XOffset); // NSLog(@"textwidth:%f",_textSize.width); rect = [selfmoveNewPoint:CGPointMake(_XOffset, startYOffset) rect:rect]; // NSLog(@"rect X:%f Y:%f",rect.origin.x, rect.origin.y); // NSLog(@"rect W:%f H:%f", rect.size.width, rect.size.height); while (rect.origin.x <= rect.size.width+rect.origin.x) { [_textdrawInRect:rect withFont:_font]; rect = [selfmoveNewPoint:CGPointMake(rect.origin.x+_textSize.width+SPACE_WIDTH, rect.origin.y) rect:rect]; // NSLog(@"inner->rect X:%f Y:%f",rect.origin.x, rect.origin.y); // NSLog(@"inner->rect W:%f H:%f", rect.size.width, rect.size.height); }
} else { //在控件的中間繪制文本 origin.x = (rect.size.width - _textSize.width)/2; origin.y = (rect.size.height - _textSize.height)/2; rect.origin = origin; [_textdrawInRect:rect withFont:_font]; } }
- (void)dealloc { [_textrelease]; [superdealloc]; }
#pragma mark - #pragma mark 外部調用 - (void)setFont:(UIFont *)font { _font = font; }
- (void)setText:(NSString *)text { [_textrelease]; _text = [text retain];
} @end |
美化 UILabel中的字體代碼分享
http://www.devdiv.com/iOS_iPhone-%E7%BE%8E%E5%8C%96 UILabel%E4%B8%AD%E7%9A%84%E5%AD%97%E4%BD%93%E4%BB%A3%E7%A0%81%E5%88%86%E4%BA%AB-thread-122319-1-1.html
UILabel跑馬燈效果
http://hi.baidu.com/suxinde2009/blog/item/5bcd0e60dd9bb77f0d33fac3.html
分享一個可 垂直頂端對齊的 UILabel
http://www.devdiv.com/%E5%88%86%E4%BA%AB%E4%B8%80%E4%B8%AA%E5%8F%AF%E5%9E%82%E7%9B%B4%E9%A1%B6%E7%AB%AF%E5%AF%B9%E9%BD%90%E7%9A%84 UILabel-weblog-64796-7239.html