UILabel 常用的属性

设置文字：

@property(nullable, nonatomic,copy) NSString *text; // default is nil

设置字体大小：

@property(null_resettable, nonatomic,strong) UIFont *font; // default is nil (system font 17 plain)

常用UIFont 类方法

+ (UIFont *)systemFontOfSize:(CGFloat)fontSize;
+ (UIFont *)boldSystemFontOfSize:(CGFloat)fontSize;
+ (UIFont *)italicSystemFontOfSize:(CGFloat)fontSize;

设置文字颜色：

@property(null_resettable, nonatomic,strong) UIColor *textColor; // default is nil (text draws black)

设置阴影颜色

@property(nullable, nonatomic,strong) UIColor *shadowColor; // default is nil (no shadow)

设置阴影位置

@property(nonatomic) CGSize shadowOffset; // default is CGSizeMake(0, -1) -- a top shadow

设置文字对齐方式

@property(nonatomic) NSTextAlignment textAlignment; // default is NSTextAlignmentLeft

是一个枚举

typedef NS_ENUM(NSInteger, NSTextAlignment) {
    NSTextAlignmentLeft      = 0,    // Visually left aligned
#if TARGET_OS_IPHONE
    NSTextAlignmentCenter    = 1,    // Visually centered
    NSTextAlignmentRight     = 2,    // Visually right aligned
#else /* !TARGET_OS_IPHONE */
    NSTextAlignmentRight     = 1,    // Visually right aligned
    NSTextAlignmentCenter    = 2,    // Visually centered
#endif
    NSTextAlignmentJustified = 3,    // Fully-justified. The last line in a paragraph is natural-aligned.
    NSTextAlignmentNatural   = 4,    // Indicates the default alignment for script
} NS_ENUM_AVAILABLE_IOS(6_0);

设置断行方式

@property(nonatomic) NSLineBreakMode lineBreakMode;

NSTextAlignment 这是一个枚举

NSLineBreakByWordWrapping =0, // Wrap at word boundaries, default

NSLineBreakByCharWrapping,// Wrap at character boundaries

NSLineBreakByClipping,// Simply clip

NSLineBreakByTruncatingHead,// Truncate at head of line: "...wxyz"

NSLineBreakByTruncatingTail,// Truncate at tail of line: "abcd..."

NSLineBreakByTruncatingMiddle// Truncate middle of line: "ab...yz"

~~@property(nullable,nonatomic,copy) NSAttributedString*attributedTextNS_AVAILABLE_IOS(6_0);// default is nil~~

设置高亮文字颜色

@property(nullable,nonatomic,strong) UIColor*highlightedTextColor;// default is nil

是否高亮文字

@property(nonatomic,getter=isHighlighted)BOOL highlighted;// default is NO

以下的不怎么用到以后补充

@property(nonatomic,getter=isUserInteractionEnabled)BOOLuserInteractionEnabled;// default is NO

@property(nonatomic,getter=isEnabled)BOOLenabled; // default is YES. changes how the label is drawn

// this determines the number of lines to draw and what to do when sizeToFit is called. default value is 1 (single line). A value of 0 means no limit

// if the height of the text reaches the # of lines or the height of the view is less than the # of lines allowed, the text will be

// truncated using the line break mode.

@property(nonatomic)NSIntegernumberOfLines;

// these next 3 property allow the label to be autosized to fit a certain width by scaling the font size(s) by a scaling factor >= the minimum scaling factor

// and to specify how the text baseline moves when it needs to shrink the font.

@property(nonatomic)BOOLadjustsFontSizeToFitWidth; // default is NO

@property(nonatomic)UIBaselineAdjustmentbaselineAdjustment;// default is UIBaselineAdjustmentAlignBaselines

@property(nonatomic)CGFloatminimumScaleFactorNS_AVAILABLE_IOS(6_0);// default is 0.0

// Tightens inter-character spacing in attempt to fit lines wider than the available space if the line break mode is one of the truncation modes before starting to truncate.

// The maximum amount of tightening performed is determined by the system based on contexts such as font, line width, etc.

@property(nonatomic)BOOLallowsDefaultTighteningForTruncationNS_AVAILABLE_IOS(9_0);// default is NO

// override points. can adjust rect before calling super.

// label has default content mode of UIViewContentModeRedraw

(CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines;
(void)drawTextInRect:(CGRect)rect;

// Support for constraint-based layout (auto layout)

// If nonzero, this is used when determining -intrinsicContentSize for multiline labels

@property(nonatomic)CGFloatpreferredMaxLayoutWidthNS_AVAILABLE_IOS(6_0);

// deprecated:

@property(nonatomic)CGFloatminimumFontSizeNS_DEPRECATED_IOS(2_0,6_0)__TVOS_PROHIBITED;// deprecated - use minimumScaleFactor. default is 0.0

// Non-functional. Hand tune by using NSKernAttributeName to affect tracking, or consider using the allowsDefaultTighteningForTruncation property.

@property(nonatomic)BOOLadjustsLetterSpacingToFitWidthNS_DEPRECATED_IOS(6_0,7_0)__TVOS_PROHIBITED;

UILabel