本文将带你了解IOS开发入门ios 开发中UIBottom的image的上下左右方向排列实现方法，希望本文对大家学IOS有所帮助。

ios   开发中UIBottom的image的上下左右方向排列实现方法

主要代码：继承于UIBottom，主要修改titleEdgeInsets和imageEdgeInsets   属性

CustomizeBtn.h

#import <uikit uikit.h="">

typedef   IBInspectable NS_ENUM(NSUInteger, CustomizeBtnImagePosition)   {

    CustomizeBtnImagePositionTop,   //   image在上，label在下

    CustomizeBtnImagePositionLeft,   //   image在左，label在右

    CustomizeBtnImagePositionBottom,   //   image在下，label在上

    CustomizeBtnImagePositionRight   //   image在右，label在左

};

IB_DESIGNABLE

@interface CustomizeBtn : UIButton

@property(nonatomic,unsafe_unretained)IBInspectable NSUInteger   imagePosition;

@property(nonatomic,unsafe_unretained)IBInspectable   NSUInteger space;

@end</uikit>

CustomizeBtn.m

#import "CustomizeBtn.h"

@implementation CustomizeBtn

-   (void)drawRect:(CGRect)rect {

    [self BtnImagePosition:self.imagePosition   imageTitleSpace:self.space];

}

-(void)setImagePosition:(NSUInteger)imagePosition   {

    _imagePosition =   imagePosition;

    [self BtnImagePosition:imagePosition   imageTitleSpace:self.space];

}

-(void)setSpace:(NSUInteger)space {

    _space =   space;

    [self BtnImagePosition:self.imagePosition   imageTitleSpace:space];

}

-   (void)BtnImagePosition:(CustomizeBtnImagePosition)style

                        imageTitleSpace:(CGFloat)space   {

    CGFloat imageWith = self.imageView.frame.size.width;

    CGFloat imageHeight =   self.imageView.frame.size.height;

    CGFloat labelWidth = 0.0;

    CGFloat labelHeight = 0.0;

    if ([UIDevice currentDevice].systemVersion.floatValue >=   8.0)   {

        //   由于iOS8中titleLabel的size为0，用下面的这种设置

        labelWidth =   self.titleLabel.intrinsicContentSize.width;

        labelHeight =   self.titleLabel.intrinsicContentSize.height;

    } else {

        labelWidth =   self.titleLabel.frame.size.width;

        labelHeight =   self.titleLabel.frame.size.height;

    }

    UIEdgeInsets imageEdgeInsets =   UIEdgeInsetsZero;

    UIEdgeInsets labelEdgeInsets =   UIEdgeInsetsZero;

    switch (style) {

        case CustomizeBtnImagePositionTop:

        {

            imageEdgeInsets =   UIEdgeInsetsMake(-labelHeight-space/2.0,   0, 0,   -labelWidth);

            labelEdgeInsets =   UIEdgeInsetsMake(0,   -imageWith, -imageHeight-space/2.0,   0);

        }

            break;

        case CustomizeBtnImagePositionLeft:

        {

            imageEdgeInsets =   UIEdgeInsetsMake(0,   -space/2.0, 0,   space/2.0);

            labelEdgeInsets =   UIEdgeInsetsMake(0,   space/2.0,   0, -space/2.0);

        }

            break;

        case CustomizeBtnImagePositionBottom:

        {

            imageEdgeInsets =   UIEdgeInsetsMake(0,   0, -labelHeight-space/2.0, -labelWidth);

            labelEdgeInsets =   UIEdgeInsetsMake(-imageHeight-space/2.0,   -imageWith, 0,   0);

        }

            break;

        case CustomizeBtnImagePositionRight:

        {

            imageEdgeInsets =   UIEdgeInsetsMake(0,   labelWidth+space/2.0,   0, -labelWidth-space/2.0);

            labelEdgeInsets =   UIEdgeInsetsMake(0,   -imageWith-space/2.0,   0, imageWith+space/2.0);

        }

            break;

        default:

            break;

    }

    self.titleEdgeInsets =   labelEdgeInsets;

    self.imageEdgeInsets =   imageEdgeInsets;

}

@end

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