iOS 轉換座標系

ios中檢視座標系的轉換主要用到uiview的四個api:

座標系轉換的實質是: 更改座標系的原點.

- (cgpoint)convertpoint:(cgpoint)point toview:(nullable uiview *)view;

- (cgpoint)convertpoint:(cgpoint)point fromview:(nullable uiview *)view;

- (cgrect)convertrect:(cgrect)rect toview:(nullable uiview *)view;

- (cgrect)convertrect:(cgrect)rect fromview:(nullable uiview *)view;

**：

#import "viewcontroller.h"

@inte***ce
viewcontroller ()
@property(nonatomic,strong)uiview *redview;
@property(nonatomic,strong)uiview *blueview;
@property(nonatomic,strong)uiview *yellowview;
@property(nonatomic,strong)uiview *orangeview;
@end
@implementation
viewcontroller
- (void)viewdidload 
- (void)touchesbegan:(nsset*)touches withevent:(uievent *)event
@end

2016-04-15 15:51:33.543 座標系轉換[2744:154111] 橘色view在父控制項中的frame = , }

2016-04-15 15:51:33.544 座標系轉換[2744:154111] 橘色view在藍色view中的frame1 = , }

2016-04-15 15:51:33.544 座標系轉換[2744:154111] 橘色view在藍色view中的frame2 = , }

2016-04-15 15:51:33.544 座標系轉換[2744:154111] 橘色view在紅色view中的frame = , }

2016-04-15 15:51:33.544 座標系轉換[2744:154111] 橘色view在控制器view中的frame = , }

2016-04-15 15:51:33.544 座標系轉換[2744:154111] 黃色view在控制view中的frame = , }

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