字符串拆分

作用：将一段文本根据url拆分出几个字符串存放在一个数组中，比如：xxxhttp://abc.com xxxxxx 拆分成xxx；http://abc.com；xxxxxx；3个字符串存放在数组中 

 参数：source，源文本

 返回：拆分的子字符串

 

- (NSMutableArray *)splitStringByUrl:(NSString *)source;

 作用：根据一个给定的宽度拆分字符串，如果字符串的宽度小于等于给定的宽度，返回数组只有一个source字符串元素，否则返回拆分的两个子字符串

 

- (NSMutableArray *)splitStringBylimitWidth:(CGFloat)width source:(NSString *)source;

 作用：找到一个字符串在label中的最后一个行显示的部分的子字符串在原字符串中的起点位置。比如一个字符串为“123456789abcdefghijk”,

 经过换行后在一个label中换成两行，最后一行显示“hijk”，则这个函数返回h在字符串中的index，值为16，根据这个index可以取出字符串“hijk”。

- (NSInteger)findStartIndexOfLastLineText:(NSString *)source;

 返回字符串的size

- (CGSize)sizeForString:(NSString *)string;

 返回给定字体的字符所站的高度

- (CGFloat)getHeightWithFontSize:(CGFloat)fontSize;

 根据拆分出的字符串布局URLView视图

- (void)layoutURLViewWithElements:(NSMutableArray *)elements;

 设置URLView视图的Frame

- (void)setFrame;

 根据url找出url相同的URLLabel，并设置颜色

- (void)setUrlLabelTextColorWithUrlString:(NSString *)url color:(UIColor *)color;

-------------------**********-------------

- (NSMutableArray *)splitStringByUrl:(NSString *)source {

[source retain];

 

NSMutableArray *elementsArray = [[[NSMutableArray alloc] init] autorelease];

NSInteger index = 0;

while (index < source.length) {

NSRange searchRange = NSMakeRange(index, source.length - index);

NSRange startRange = [source rangeOfString:@"http://" options:NSCaseInsensitiveSearch range:searchRange];

if (startRange.location == NSNotFound) {

DSStyleString *currentElement = [[DSStyleString alloc] init];

currentElement.isUrl = NO;

currentElement.string = [source substringWithRange:searchRange];

[elementsArray addObject:currentElement];

break;

}else {

NSRange beforeRange = NSMakeRange(searchRange.location, startRange.location - searchRange.location);

if (beforeRange.length) {

DSStyleString *beforeElement = [[DSStyleString alloc] init];

beforeElement.isUrl = NO;

beforeElement.string = [source substringWithRange:beforeRange];

[elementsArray addObject:beforeElement];

}

 

NSRange searchRange = NSMakeRange(startRange.location, source.length - startRange.location);

NSRange endRange = [source rangeOfString:@" " options:NSCaseInsensitiveSearch range:searchRange];

if (endRange.location == NSNotFound) {

DSStyleString *urlElement = [[DSStyleString alloc] init];

urlElement.isUrl = YES;

urlElement.string = [source substringWithRange:searchRange];

[elementsArray addObject:urlElement];

break;

}else {

NSRange urlRange = NSMakeRange(startRange.location, endRange.location - startRange.location);

DSStyleString *urlElement = [[DSStyleString alloc] init];

urlElement.isUrl = YES;

urlElement.string = [source substringWithRange:urlRange];

[elementsArray addObject:urlElement];

index = endRange.location;

}

}

}

 

[source release];

return elementsArray;

}

- (void)layoutURLViewWithElements:(NSMutableArray *)elements {

[elements retain];

NSInteger count = [elements count];

if (count == 0) return;

BOOL haveHttp = NO;

for (DSStyleString *styleString in elements) {

if (styleString.isUrl == YES) {

haveHttp = YES;

break;

}

}

 

if (haveHttp == YES) {

for (int i = 0; i < count; i ++) {

DSStyleString *styleString = (DSStyleString *)[elements objectAtIndex:i];

NSArray *existSubViews = [self subviews];

if ([existSubViews count] > 0) {

UIView *lastSubView = [existSubViews lastObject];

NSString *forwardSourceString = nil;

NSString *lastLineStringOfForwardSourceString = nil;

NSInteger lastLineStringWidthOfForwardSourceString = 0;

NSInteger leaveWidth = 0;

CGFloat originX = 0;

CGFloat originY = 0;

CGFloat width = 0;

CGFloat height = 0;

CGFloat characterHeight = [self getHeightWithFontSize:FontSize];

 

if ([[lastSubView class] isSubclassOfClass:[UILabel class]]) {

forwardSourceString = [(UILabel *)lastSubView text];

}else if ([[lastSubView class] isSubclassOfClass:[DSURLLabel class]]) {

forwardSourceString = [[(DSURLLabel *)lastSubView urlLabel] text];

}

 

CGSize forwardSourceStringSize = [self sizeForString:forwardSourceString];

lastLineStringOfForwardSourceString = [forwardSourceString substringFromIndex:[selffindStartIndexOfLastLineText:forwardSourceString]];

CGSize lastLineStringOfForwardSourceStringSize = [self sizeForString:lastLineStringOfForwardSourceString];

lastLineStringWidthOfForwardSourceString = lastLineStringOfForwardSourceStringSize.width;

if (forwardSourceStringSize.height > characterHeight) {

leaveWidth = _frameWidth - lastLineStringOfForwardSourceStringSize.width;

}else {

leaveWidth = _frameWidth - lastSubView.frame.origin.x - lastSubView.frame.size.width;

}

 

NSMutableArray *splitedSubStringByLimitWidthArray = [[NSMutableArray alloc] init];

[splitedSubStringByLimitWidthArray addObjectsFromArray:[self splitStringBylimitWidth:leaveWidthsource:styleString.string]];

 

if ([splitedSubStringByLimitWidthArray count] == 1) {

if (_needNewLine) {

originX = 0;

originY = lastSubView.frame.origin.y + lastSubView.frame.size.height;

}else {

if (forwardSourceStringSize.height > characterHeight) {

originX = lastLineStringOfForwardSourceStringSize.width;

}else {

originX = lastSubView.frame.origin.x + lastSubView.frame.size.width;

}

originY = lastSubView.frame.origin.y + lastSubView.frame.size.height - characterHeight;

}

 

CGSize newLabelSize = [self sizeForString:styleString.string];

width = newLabelSize.width;

height = newLabelSize.height;

 

if (styleString.isUrl == YES) {

DSURLLabel *urlLabel = [[DSURLLabel alloc] initWithFrame:CGRectMake(originX, originY, width, height)];

urlLabel.backgroundColor = [UIColor clearColor];

urlLabel.urlString = styleString.string;

urlLabel.urlLabel.text = styleString.string;

urlLabel.urlLabel.numberOfLines = 0;

urlLabel.urlLabel.lineBreakMode = LineBreakMode;

urlLabel.urlLabel.font = [UIFont systemFontOfSize:FontSize];

urlLabel.delegate = self;

[self addSubview:urlLabel];

[urlLabel release];

}else {

UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(originX, originY, width, height)];

textLabel.numberOfLines = 0;

textLabel.lineBreakMode = LineBreakMode;

textLabel.font = [UIFont systemFontOfSize:FontSize];

textLabel.backgroundColor = [UIColor clearColor];

textLabel.text = styleString.string;

[self addSubview:textLabel];

[textLabel release];

}

 

}else if ([splitedSubStringByLimitWidthArray count] == 2) {

for(int i = 0; i < 2; i++) {

NSString *currentSubString = [splitedSubStringByLimitWidthArray objectAtIndex:i];

CGSize newLabelSize = [self sizeForString:currentSubString];

if (i == 0) {

if (forwardSourceStringSize.height > characterHeight) {

originX = lastLineStringOfForwardSourceStringSize.width;

}else {

originX = lastSubView.frame.origin.x + lastSubView.frame.size.width;

}

originY = lastSubView.frame.origin.y + lastSubView.frame.size.height - characterHeight;

width = _frameWidth - originX;

}else if (i == 1) {

originX = 0;

originY = lastSubView.frame.origin.y + lastSubView.frame.size.height;

width = newLabelSize.width;

 

}

height = newLabelSize.height;

 

 

if (styleString.isUrl == YES) {

DSURLLabel *urlLabel = [[DSURLLabel alloc] initWithFrame:CGRectMake(originX, originY, width, height)];

urlLabel.backgroundColor = [UIColor clearColor];

urlLabel.urlString = styleString.string;

urlLabel.urlLabel.text = currentSubString;

urlLabel.urlLabel.font = [UIFont systemFontOfSize:FontSize];

urlLabel.urlLabel.lineBreakMode = LineBreakMode;

if (i == 0) {

urlLabel.urlLabel.numberOfLines = 1;

}else if (i == 1) {

urlLabel.urlLabel.numberOfLines = 0;

}

urlLabel.delegate = self;

[self addSubview:urlLabel];

[urlLabel release];

}else {

UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(originX, originY, width, height)];

textLabel.backgroundColor = [UIColor clearColor];

textLabel.font = [UIFont systemFontOfSize:FontSize];

textLabel.lineBreakMode = LineBreakMode;

if (i == 0) {

textLabel.numberOfLines = 1;

}else if (i == 1) {

textLabel.numberOfLines = 0;

}

textLabel.text = currentSubString;

[self addSubview:textLabel];

[textLabel release];

}

}

}

 

[splitedSubStringByLimitWidthArray release];

 

}else {

CGSize newLabelSize = [self sizeForString:styleString.string];

if (styleString.isUrl == YES) {

DSURLLabel *urlLabel = [[DSURLLabel alloc] initWithFrame:CGRectMake(0, 0, newLabelSize.width, newLabelSize.height)];

urlLabel.backgroundColor = [UIColor clearColor];

urlLabel.urlLabel.font = [UIFont systemFontOfSize:FontSize];

urlLabel.urlLabel.numberOfLines = 0;

urlLabel.urlLabel.lineBreakMode = LineBreakMode;

urlLabel.urlString = styleString.string;

urlLabel.urlLabel.text = styleString.string;

urlLabel.delegate = self;

[self addSubview:urlLabel];

[urlLabel release];

}else {

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, newLabelSize.width, newLabelSize.height)];

label.backgroundColor = [UIColor clearColor];

label.text = styleString.string;

label.font = [UIFont systemFontOfSize:FontSize];

label.numberOfLines = 0;

label.lineBreakMode = LineBreakMode;

[self addSubview:label];

[label release];

}

}

}

}else {

DSStyleString *styleString = [elements objectAtIndex:0];

CGSize textSize = [self sizeForString:styleString.string];

UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, textSize.width, textSize.height)];

textLabel.numberOfLines = 0;

textLabel.backgroundColor = [UIColor clearColor];

textLabel.lineBreakMode = LineBreakMode;

textLabel.text = _sourceText;

textLabel.font = [UIFont systemFontOfSize:FontSize];

[self addSubview:textLabel];

[textLabel release];

}

[self setFrame];

[elements release];

}

- (void)setFrame {

UIView *lastSubView = (UIView *)[[self subviews] lastObject];

CGFloat heigh = lastSubView.frame.origin.y + lastSubView.frame.size.height;

self.frame = CGRectMake(_frameOriginX, _frameOriginY , _frameWidth, heigh);

}

- (NSInteger)findStartIndexOfLastLineText:(NSString *)source {

[source retain];

CGSize sourceTextSize = [self sizeForString:source];

NSInteger lines = sourceTextSize.height / [self getHeightWithFontSize:FontSize];

NSInteger startIndex = 0;

if (lines > 1) {

NSInteger length = [source length];

for (int i = length; i > 0; i --) {

CGSize textSize = [self sizeForString:[source substringToIndex:i]];

if (textSize.height < sourceTextSize.height) {

startIndex = i;

break;

}

}

}

[source release];

return startIndex;

}

- (NSMutableArray *)splitStringBylimitWidth:(CGFloat)width source:(NSString *)source {

[source retain];

NSMutableArray *subStrings = [[[NSMutableArray alloc] init] autorelease];

NSInteger length = [source length];

for (int i = length; i > 0; i--) {

CGSize textSize = [self sizeForString:[source substringToIndex:i]];

if (textSize.width <= width && i == length) {

[subStrings addObject:source];

_needNewLine = NO;

break;

}

if ((textSize.width < width) && (textSize.height == [self getHeightWithFontSize:FontSize])) {

[subStrings addObject:[source substringToIndex:i]];

[subStrings addObject:[source substringFromIndex:i]];

break;

}

if (i == 1) {

[subStrings addObject:source];

_needNewLine = YES;

break;

}

}

[source release];

return subStrings;

}

- (CGSize)sizeForString:(NSString *)string {

CGSize textSize = [string sizeWithFont:[UIFont systemFontOfSize:FontSize]constrainedToSize:CGSizeMake(_frameWidth, 10000.0f) lineBreakMode:LineBreakMode];

return textSize;

}

- (CGFloat)getHeightWithFontSize:(CGFloat)fontSize {

NSString *character = @" ";

CGSize characterSize = [self sizeForString:character];

return characterSize.height;

}

- (void)setUrlLabelTextColorWithUrlString:(NSString *)url color:(UIColor *)color {

NSArray *subViews = [self subviews];

for (UIView *subView in subViews) {

if ([[subView class] isSubclassOfClass:[DSURLLabel class]]) {

if ([((DSURLLabel *)subView).urlString isEqualToString:url]) {

((DSURLLabel *)subView).urlLabel.textColor = color;

}

}

}

}

#pragma mark -

#pragma mark DSURLLabelDelegate methods

- (void)urlTouchesBegan:(DSURLLabel *)urlLabel {

[self setUrlLabelTextColorWithUrlString:urlLabel.urlString color:[UIColor redColor]];

}

- (void)urlTouchesEnd:(DSURLLabel *)urlLabel {

[self setUrlLabelTextColorWithUrlString:urlLabel.urlString color:[UIColor blueColor]];

if (_delegate && [(NSObject *)_delegate respondsToSelector:@selector(urlWasClicked:urlString:)]) {

[_delegate urlWasClicked:self urlString:urlLabel.urlString];

}

}