UILabel垂直居上對齊[label sizeToFit];
//設(shè)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(shè)置label的行數(shù)，這個可以根據(jù)上節(jié)的UITextView自適應高度
label.numberOfLines = 2;
label.lineBreakMode = UILineBreakModeWordWrap;
label.textAlignment =? UITextAlignmentCenter;//設(shè)置文字對齊位置，居左，居中，居右
label.text = @ "123" ;//設(shè)置顯示文字
//設(shè)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(shè)置字體:粗體，正常的是 SystemFontOfSize，調(diào)用系統(tǒng)的字體配置
label.font = [UIFont boldSystemFontOfSize:20];
label.font = [UIFont fontWithName:@ "Arial Rounded MT Bold"? size:(36.0)];
//[UIFont fontWithName:@ "Arial" size:14.0]]; //非加粗
//設(shè)置文本是否高亮和高亮時的顏色
scoreLabel.highlighted = YES;
scoreLabel.highlightedTextColor = [UIColor orangeColor];
//設(shè)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(shè)置是否能與用戶進行交互
scoreLabel.userInteractionEnabled = YES;
//設(shè)置label中的文字是否可變，默認值是YES
scoreLabel.enabled = NO;
//設(shè)置字體大小是否適應label寬度
label.adjustsFontSizeToFitWidth = YES;
//如果adjustsFontSizeToFitWidth屬性設(shè)置為YES，這個屬性就來控制文本基線的行為
coreLabel.baselineAdjustment = UIBaselineAdjustmentNone
typedefenum {
UIBaselineAdjustmentAlignBaselines =0,// default. used when shrinking text to position based on the original baseline
UIBaselineAdjustmentAlignCenters,
UIBaselineAdjustmentNone,
} UIBaselineAdjustment;
//最小文字號數(shù)
minimumFontSize
設(shè)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(nèi)，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(diào)用super可以按默認圖形屬性繪制,若自己完全重寫繪制函數(shù)，就不用調(diào)用super了.
- (void)drawTextInRect:(CGRect)rect;
eg：
UILabel *label = [[UILabelalloc] initWithFrame:CGRectMake(0, 0, 75, 40)];? //聲明UIlbel并指定其位置和長寬
label.backgroundColor = [UIColorclearColor];? //設(shè)置label的背景色，這里設(shè)置為透明色。
label.font = [UIFont fontWithName:@"Helvetica-Bold" size:13];? //設(shè)置label的字體和字體大小。
//lable的旋轉(zhuǎn)
label.transform = CGAffineTransformMakeRotation(0.1);? ? //設(shè)置label的旋轉(zhuǎn)角度
label.text = @“helloworld”;? //設(shè)置label所顯示的文本
label.textColor = [UIColorwhiteColor];? ? //設(shè)置文本的顏色
label.shadowColor = [UIColorcolorWithWhite:0.1falpha:0.8f];? ? //設(shè)置文本的陰影色彩和透明度。
label.shadowOffset = CGSizeMake(2.0f, 2.0f);? ? //設(shè)置陰影的傾斜角度。
label.textAlignment = UITextAlignmentCenter;? ? //設(shè)置文本在label中顯示的位置，這里為居中。
//換行技巧：如下?lián)Q行可實現(xiàn)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(shù)
讓label自適應里面的文字，自動調(diào)整寬度和高度的
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,0,0,0)];這個frame是初設(shè)的，沒關(guān)系，后面還會重新設(shè)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(diào)整其大小了。
UILabel跑馬燈效果//http://www.cocoachina.com/bbs/read.php?tid=74540#import@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(zhí)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(nèi)部調(diào)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(guān)閉定時器
- (void)cancelRun
{
if (_timer)
{
[_timerinvalidate];
}
}
//定時器執(zhí)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(diào)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%96UILabel%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%84UILabel-weblog-64796-7239.html
讓UILabel具有鏈接功能，點擊后調(diào)用safari打開網(wǎng)址
[objc] view plain copy 在CODE上查看代碼片派生到我的代碼片
//儂儂官網(wǎng)連接
UILabel *labelGovUrl = [[UILabel alloc] initWithFrame:CGRectMake(73.0, 330.0, 180.0, 40.0)];
labelGovUrl.autoresizingMask = (UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight);
labelGovUrl.text = @"儂儂官網(wǎng) >";
labelGovUrl.backgroundColor = [UIColor clearColor];
labelGovUrl.textColor = [UIColor whiteColor];
labelGovUrl.font = [UIFont fontWithName:@"Helvetica-Bold" size:14];
labelGovUrl.userInteractionEnabled = YES;
labelGovUrl.tag = K_NNGOV_WEBSITE_LABEL_URL;
UITapGestureRecognizer *tapGesture =
[[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(openURL:)] autorelease];
[labelGovUrl addGestureRecognizer:tapGesture];
[self.view addSubview:labelGovUrl];
[labelGovUrl release];
-(void)openURL:(UITapGestureRecognizer *)gesture{
NSInteger tag = gesture.view.tag;
NSString *url = nil;
if (tag == K_NNWEIBO_LABEL_URL) {
url = @"http://t.qq.com/yourgame/";
}
if(tag == K_NNGOV_WEBSITE_LABEL_URL){
url = @"http://www.zjnn.cn/";
}
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}
