IOS adaptive height, font color change, ios font color

IOS adaptive height, font color change, ios font color

 

 

# Define kMainBoundsWidth ([UIScreen mainScreen]. bounds). size. width // screen width # define kFont [UIFont systemFontOfSize: 17.f] // font size # define kLineSpacing 7 // row spacing

-(Void) viewDidLoad {[super viewDidLoad]; // change the view background color to yellow self. view. backgroundColor = [UIColor grayColor]; self. textView. text = @ "I got a question regarding objc blocks. if you want to use self in a block you shoshould weakify it and strongify it again in the block so you don't get into a retain cycle. "; // text content self. textField. text = @ "regarding"; // highlight content self. lableContent. text = self. textView. text; // display Content @ weakify (self); [self. textView. rac_textSignal subscribeNext: ^ (NSString * _ Nullable x) {@ strongify (self); self. lableContent. text = x; [self layoutLableContent: self. textField. text content: x] ;}]; // highlight text [self. textField. rac_textSignal subscribeNext: ^ (NSString * _ Nullable x) {[self layoutLableContent: self. textField. text content: self. lableContent. text] ;}] ;}/ ** text content */-(UITextView *) textView {if (! _ TextView) {_ textView = [[UITextView alloc] init]; _ textView. font = [UIFont systemFontOfSize: 15.f]; _ textView. showsHorizontalScrollIndicator = YES; _ textView. layer. cornerRadius = 4.f; _ textView. layer. masksToBounds = YES; [self. view addSubview: _ textView]; [_ textView mas_makeConstraints: ^ (MASConstraintMaker * make) {make. top. similar to (self. view ). offset (80); make. centerX. similar to (self. view); make. width. Similar to (self. view ). multi-pliedby (0.8); make. height. offset (100);}];} return _ textView;}/** highlighted text */-(UITextField *) textField {if (! _ TextField) {_ textField = [UITextField new]; _ textField. placeholder = @ "Please enter the highlighted text"; _ textField. layer. cornerRadius = 4.f; _ textField. layer. masksToBounds = YES; _ textField. textAlignment = NSTextAlignmentCenter; _ textField. backgroundColor = [UIColor whiteColor]; _ textField. keyboardType = UITextAutocorrectionTypeNo; [self. view addSubview: _ textField]; [_ textField mas_makeConstraints: ^ (MASConstraintMaker * Make) {make. top. similar to (_ textView. mas_bottom ). offset (30); make. centerX. similar to (self. view); make. width. similar to (self. view ). multi-pliedby (0.5); make. height. offset (50) ;}] ;}return _ textField ;}/ ** target text */-(UILabel *) lableContent {if (! _ LableContent) {_ lableContent = [UILabel new]; _ lableContent. font = kFont; _ lableContent. layer. cornerRadius = 4.f; _ lableContent. layer. masksToBounds = YES; _ lableContent. layer. borderColor = [UIColor yellowColor]. CGColor; _ lableContent. layer. borderWidth = 1.f; _ lableContent. backgroundColor = [UIColor whiteColor]; _ lableContent. numberOfLines = 0; [self. view addSubview: _ lableContent]; [_ lableContent mas_makeConstraints: ^ (MASConstraintMaker * make) {make. top. pointer to (_ textField. mas_bottom ). offset (50); make. centerX. similar to (self. view); make. width. offset (kMainBoundsWidth-40); make. height. offset (200);}];} return _ lableContent;}/** update data */-(void) layoutLableContent :( NSString *) keyWord content :( NSString *) content {CGFloat width = kMainBoundsWidth-40; CGSize contentSize = [self adaptContentStringSizeWithFont: kFont withWidth: width content: content]; CGSize size = CGSizeMake (width, contentSize. height + 25); [self. lableContent mas_updateConstraints: ^ (MASConstraintMaker * make) {make. height. offset (size. height) ;}]; // you must call this method to obtain the animation effect [self. view layoutIfNeeded]; NSMutableAttributedString * attributedStrContent = [[NSMutableAttributedString alloc] initWithString: self. lableContent. text]; NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init]; paragraphStyle. lineSpacing = attributes; [attributedStrContent addattriange: Attributes value: paragraphStyle range: NSMakeRange (0, [attributedStrContent length])]; [self attributes: keyWord inString: content tatgetString: attributedStrContent]; self. lableContent. attributedText = attributedStrContent;}/** in the color attribute of the specified string */-(void) addAttributeColorOfSubString :( NSString *) subStr inString :( NSString *) content tatgetString :( NSMutableAttributedString *) attributedString {NSString * string1 = [content stringByAppendingString: subStr]; NSString * temp; bool iscnChar = NO; int cnIndex = 0; for (int I = 0; I <content. length; I ++) {temp = [string1 substringWithRange: NSMakeRange (I, subStr. length)]; if ([temp ishangtostring: subStr]) {nsange range = {I, subStr. length}; [attributedString addAttribute: NSForegroundColorAttributeName value: [UIColor redColor] range: range]; [attributedString addAttribute: NSFontAttributeName value: kFont range: range];} unichar c = [string1 characterAtIndex: i]; if (c >=0x4e00 & c <= 0x9FA5) {cnIndex = I; iscnChar = YES; nsange range = {I, 1}; [attributedString addAttribute: NSForegroundColorAttributeName value: [UIColor blueColor] range: range] ;}}- (CGSize) adaptContentStringSizeWithFont :( UIFont *) font withWidth :( CGFloat) width content :( NSString *) content {// row spacing NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init]; paragraphStyle. lineSpacing = kLineSpacing; NSDictionary * attributes =@{ attributes: font, attributes: paragraphStyle}; CGSize contentSize = [content attributes: CGSizeMake (width, MAXFLOAT) options: attributes context: nil]. size; return contentSize;} // cancel the keyboard-(void) touchesBegan :( NSSet <UITouch *> *) touches withEvent :( UIEvent *) event {[self. textView resignFirstResponder]; [self. textField resignFirstResponder]; [self. lableContent resignFirstResponder];}