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Multiline title support #47

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22 changes: 17 additions & 5 deletions ALAlertBanner/ALAlertBanner.m
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Original file line number Diff line number Diff line change
Expand Up @@ -48,14 +48,26 @@ this software and associated documentation files (the "Software"), to deal in

static CGFloat const kForceHideAnimationDuration = 0.1f;


@interface NSMutableParagraphStyle (LineBreak)
+ (NSMutableParagraphStyle *)defaultParagraphStyleWithLineBreakMode:(NSLineBreakMode)breakMode;
@end
@implementation NSMutableParagraphStyle(LineBreak)
+ (NSMutableParagraphStyle *)defaultParagraphStyleWithLineBreakMode:(NSLineBreakMode)breakMode {
NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
[style setLineBreakMode:breakMode];
return style;
}
@end

#define AL_DEVICE_ANIMATION_DURATION UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ? kRotationDurationIPad : kRotationDurationIphone;

//macros referenced from MBProgressHUD. cheers to @matej
#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000
#define AL_SINGLELINE_TEXT_HEIGHT(text, font) [text length] > 0 ? [text sizeWithAttributes:nil].height : 0.f;
#define AL_MULTILINE_TEXT_HEIGHT(text, font, maxSize, mode) [text length] > 0 ? [text boundingRectWithSize:maxSize \
options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading) \
attributes:nil \
attributes:@{NSFontAttributeName: font, NSParagraphStyleAttributeName: [NSMutableParagraphStyle defaultParagraphStyleWithLineBreakMode:mode]} \
context:NULL].size.height : 0.f;
#else
#define AL_SINGLELINE_TEXT_HEIGHT(text, font) [text length] > 0 ? [text sizeWithFont:font].height : 0.f;
Expand Down Expand Up @@ -174,12 +186,12 @@ - (void)setupSubviews {
_titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:13.f];
_titleLabel.textColor = [UIColor colorWithWhite:1.f alpha:0.9f];
_titleLabel.textAlignment = NSTextAlignmentLeft;
_titleLabel.numberOfLines = 1;
_titleLabel.lineBreakMode = NSLineBreakByTruncatingTail;
_titleLabel.layer.shadowColor = [UIColor blackColor].CGColor;
_titleLabel.layer.shadowOffset = CGSizeMake(0.f, -1.f);
_titleLabel.layer.shadowOpacity = 0.3f;
_titleLabel.layer.shadowRadius = 0.f;
_titleLabel.numberOfLines = 0;
_titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
[self addSubview:_titleLabel];

_subtitleLabel = [[UILabel alloc] init];
Expand Down Expand Up @@ -531,7 +543,7 @@ - (void)setInitialLayout {
BOOL isSuperviewKindOfWindow = ([superview isKindOfClass:[UIWindow class]]);

CGSize maxLabelSize = CGSizeMake(superview.bounds.size.width - (kMargin*3) - self.styleImageView.image.size.width, CGFLOAT_MAX);
CGFloat titleLabelHeight = AL_SINGLELINE_TEXT_HEIGHT(self.titleLabel.text, self.titleLabel.font);
CGFloat titleLabelHeight = AL_MULTILINE_TEXT_HEIGHT(self.titleLabel.text, self.titleLabel.font, maxLabelSize, self.titleLabel.lineBreakMode);
CGFloat subtitleLabelHeight = AL_MULTILINE_TEXT_HEIGHT(self.subtitleLabel.text, self.subtitleLabel.font, maxLabelSize, self.subtitleLabel.lineBreakMode);
CGFloat heightForSelf = titleLabelHeight + subtitleLabelHeight + (self.subtitleLabel.text == nil || self.titleLabel.text == nil ? kMargin*2 : kMargin*2.5);

Expand Down Expand Up @@ -578,7 +590,7 @@ - (void)setInitialLayout {

- (void)updateSizeAndSubviewsAnimated:(BOOL)animated {
CGSize maxLabelSize = CGSizeMake(self.superview.bounds.size.width - (kMargin*3.f) - self.styleImageView.image.size.width, CGFLOAT_MAX);
CGFloat titleLabelHeight = AL_SINGLELINE_TEXT_HEIGHT(self.titleLabel.text, self.titleLabel.font);
CGFloat titleLabelHeight = AL_MULTILINE_TEXT_HEIGHT(self.titleLabel.text, self.titleLabel.font, maxLabelSize, self.titleLabel.lineBreakMode);
CGFloat subtitleLabelHeight = AL_MULTILINE_TEXT_HEIGHT(self.subtitleLabel.text, self.subtitleLabel.font, maxLabelSize, self.subtitleLabel.lineBreakMode);
CGFloat heightForSelf = titleLabelHeight + subtitleLabelHeight + (self.subtitleLabel.text == nil || self.titleLabel.text == nil ? kMargin*2.f : kMargin*2.5f);

Expand Down